Publications by Type

Click Here for Publications by Year

Preprints

2026

  1. J. Yim, G. I. Kim, V. Workman, S. Kim, O. A. Barrera, R. Lu, and G. Bahl, “Non-reciprocal electrooptic intermodal scattering with momentum engineered RF waves,” arXiv, arXiv:2602.21527 [physics.optics], Feb. 2026, doi: 10.48550/arXiv.2602.21527.
  2. I. Anderson, A. Posadas, A. A. Demkov, and R. Lu, “Tunable ferroelectric acoustic resonators in monolithic thin-film barium titanate,” arXiv, arXiv:2602.16102 [eess.SY], Feb. 2026, doi: 10.48550/arXiv.2602.16102.
  3. T. Anusorn, B. Kim, I. Anderson, Z. Yao, and R. Lu, “Lattice XBAR filters in thin-film lithium niobate,” arXiv, arXiv:2602.14937 [eess.SP], Feb. 2026, doi: 10.48550/arXiv.2602.14937.

2025

  1. V. Chulukhadze, Z. Liu, Z. Yao, L. Matto, T.-H. Hsu, N. Ravi, X. Niu, M. E. Liao, M. S. Goorsky, N. Hall, and R. Lu, “Bimorph lithium niobate piezoelectric micromachined ultrasonic transducers,” arXiv, arXiv:2512.07718 [cond-mat.mtrl-sci], Dec. 2025, doi: 10.48550/arXiv.2512.07718.
  2. Z. Yao, C. Daniel, L. Matto, H. Chang, V. Chulukhadze, M. Liao, J. Kramer, E. Stolt, M. S. Goorsky, J. Rivas-Davila, and R. Lu, “Periodically poled piezoelectric lithium niobate resonator for piezoelectric power conversion,” arXiv, arXiv:2508.09407, 2025, doi: 10.48550/arXiv.2508.09407.

Journal Publications

2026

  1. J. Kramer, J. Campbell, T.-H. Hsu, I. Anderson, and R. Lu, “Cryogenic Q enhancement in 50 GHz piezoelectric resonators,” Appl. Phys. Lett., vol. 128, no. 10, Art. no. 102205, 2026, doi: 10.1063/5.0311741.
  2. O. Barrera, J. Kramer, L. Matto, V. Chulukhadze, S. Cho, M. Liao, M. S. Goorsky, and R. Lu, “50 GHz piezoelectric acoustic filter,” IEEE J. Microw., pp. 1–10, 2026, doi: 10.1109/JMW.2026.3661341.
  3. Z. Liu, X. Niu, E. Vatankhah, Y. Meng, S. Kim, R. Lu, A. Alù, and N. A. Hall, “High-velocity laser Doppler vibrometry measurements on an aluminum nitride bimorph wedge resonator,” Communications Engineering, 2026, doi: 10.1038/s44172-026-00595-7.
  4. I. Anderson, J. Kramer, T.-H. Hsu, Y. Wang, V. Chulukhadze, and R. Lu, “Phononic combs in lithium niobate acoustic resonators,” Appl. Phys. Lett., vol. 128, no. 5, Art. no. 052201, 2026, doi: 10.1063/5.0304587.
  5. Y. Wang, B. Kim, N. Ravi, K. Saha, S. Dasgupta, V. Chulukhadze, E. Kwon, L. Matto, P. Simeoni, O. Barrera, I. Anderson, T.-H. Hsu, J. Hou, M. Rinaldi, M. S. Goorsky, and R. Lu, “62.6 GHz ScAlN solidly mounted acoustic resonators,” Appl. Phys. Lett., vol. 128, no. 4, Art. no. 042201, 2026, doi: 10.1063/5.0306947.
  6. V. Chulukhadze, Y. Wang, L. Matto, M. E. Liao, I. Anderson, J. Kramer, S. Cho, M. S. Goorsky, and R. Lu, “Toward miniature high-coupling lithium niobate thin-film bulk acoustic wave resonators at millimeter wave,” IEEE Trans. Electron Devices, vol. 73, no. 2, pp. 988–994, Feb. 2026, doi: 10.1109/TED.2025.3644272.

2025

  1. S. Cho, B. Kim, L. Matto, O. Barrera, P. Simeoni, Y. Wang, M. Liao, T.-H. Hsu, J. Kramer, M. Rinaldi, M. S. Goorsky, and R. Lu, “An 11.7-GHz ScAlN FBAR filter: case study on scaling limits and challenges,” IEEE J. Microelectromech. Syst., 2025, doi: 10.1109/JMEMS.2025.3635664.
  2. T. Anusorn, O. Barrera, J. Kramer, I. Anderson, Z. Yao, V. Chulukhadze, and R. Lu, “Practical demonstrations of FR3-band thin-film lithium niobate acoustic filter design,” IEEE Trans. Ultrason., Ferroelectr., Freq. Control, 2025, doi: 10.1109/TUFFC.2025.3632215.
  3. O. Barrera, S. Cho, J. Kramer, V. Chulukhadze, T.-H. Hsu, and R. Lu, “19.3 GHz acoustic filter with high close-in rejection in tri-layer thin-film lithium niobate,” IEEE Electron Device Lett., 2025, doi: 10.1109/LED.2025.3616983.
  4. M. Chaudhari, L. Matto, N. Ahmed, M. Liao, V. Tallavajhula, Y. Long, Z. Yao, J. Campbell, T.-H. Hsu, M. S. Goorsky, and R. Lu, “Thermal endurance of suspended thin-film lithium niobate up to 800 °C,” IEEE Trans. Ultrason., Ferroelectr., Freq. Control, 2025, doi: 10.1109/TUSON.2025.3650497.
  5. T.-H. Hsu, L. Matto, J. Campbell, J. Kramer, Z.-Q. Lee, I. Anderson, K. Chow, M. S. Goorsky, M.-H. Li, and R. Lu, “Toward mmWave surface acoustic wave resonators in lithium niobate on silicon carbide,” IEEE Trans. Ultrason., Ferroelectr., Freq. Control, vol. 72, no. 11, pp. 1522–1532, Nov. 2025, doi: 10.1109/TUFFC.2025.3611298.
  6. V. Chulukhadze, J. Kramer, T.-H. Hsu, O. Barrera, and R. Lu, “High-Q millimeter-wave acoustic resonators in thin-film lithium niobate using higher-order antisymmetric modes,” IEEE Electron Device Lett., vol. 46, no. 11, pp. 2185–2188, Nov. 2025, doi: 10.1109/LED.2025.3602762.
  7. J. Kramer and R. Lu, “A generalized acoustic framework for multilayer piezoelectric platforms,” IEEE Trans. Ultrason., Ferroelectr., Freq. Control, vol. 72, no. 9, pp. 1302–1311, Sept. 2025, doi: 10.1109/TUFFC.2025.3595433.
  8. V. Chulukhadze, J. Kramer, T.-H. Hsu, I. Anderson, O. Barrera, S. Cho, J. Campbell, and R. Lu, “Cross-sectional Lamé mode acoustic resonators in thin-film lithium niobate,” IEEE J. Microelectromech. Syst., 2025, doi: 10.1109/JMEMS.2025.3595506.
  9. R. Lu, “Recent advances in high-performance millimeter-wave acoustic resonators and filters using thin-film lithium niobate,” Prog. Quantum Electron., vols. 100–101, Art. no. 100565, Mar. 2025, doi: 10.1016/j.pquantelec.2025.100565.
  10. S. Cano, C. Caballero, O. Barrera, R. Lu, J. Verdú, and P. de Paco, “General synthesis methodology for acoustic wave ladder filters in the bandpass domain,” IEEE Trans. Microw. Theory Techn., vol. 73, no. 10, pp. 7055–7068, Oct. 2025, doi: 10.1109/TMTT.2025.3565809.
  11. O. Barrera, T. Anusorn, S. Cho, J. Kramer, V. Chulukhadze, T.-H. Hsu, J. Campbell, I. Anderson, and R. Lu, “Frequency and bandwidth design towards millimeter-wave thin-film lithium niobate acoustic filters,” IEEE Microw. Wireless Technol. Lett., vol. 35, no. 6, pp. 796–799, June 2025, doi: 10.1109/LMWT.2025.3559400.
  12. X. Niu, V. Chulukhadze, Z. Liu, E. Vatankhah, Y. Wang, Y. Meng, L. Matto, M. S. Goorsky, R. Lu, and N. A. Hall, “Lithium niobate microphone with high SNR potential,” IEEE Sensors J., vol. 25, no. 10, pp. 18115–18122, May 2025, doi: 10.1109/JSEN.2025.3555885.
  13. I. Anderson, O. Barrera, N. Ravi, L. Matto, K. Saha, S. Dasgupta, J. Campbell, J. Kramer, E. Kwon, T.-H. Hsu, S. Cho, P. Simeoni, J. Hou, M. Rinaldi, M. S. Goorsky, and R. Lu, “Solidly mounted scandium aluminum nitride on acoustic Bragg reflector platforms at 14–20 GHz,” IEEE Trans. Ultrason., Ferroelectr., Freq. Control, vol. 72, no. 5, pp. 656–662, May 2025, doi: 10.1109/TUFFC.2025.3554597.
  14. J. Kramer, B. T. Bosworth, L. Matto, N. R. Jungwirth, O. Barrera, F. Bergmann, S. Cho, V. Chulukhadze, M. Goorsky, N. D. Orloff, and R. Lu, “Acoustic resonators above 100 GHz,” Appl. Phys. Lett., vol. 127, no. 1, Art. no. 012204, 2025, doi: 10.1063/5.0275691.
  15. J. Campbell, T.-H. Hsu, L. Matto, N. Ahmed, M. Chaudhari, Z. Du, I. Anderson, J. Kramer, V. Chulukhadze, K. Chow, M.-H. Li, M. S. Goorsky, and R. Lu, “52 GHz surface acoustic wave resonators in thin-film lithium niobate on silicon carbide,” IEEE Trans. Ultrason., Ferroelectr., Freq. Control, vol. 72, no. 2, pp. 275–282, Feb. 2025, doi: 10.1109/TUFFC.2024.3522042.

2024

  1. O. Barrera, N. Ravi, K. Saha, S. Dasgupta, J. Campbell, J. Kramer, E. Kwon, T.-H. Hsu, S. Cho, I. Anderson, P. Simeoni, J. Hou, M. Rinaldi, M. S. Goorsky, and R. Lu, “18 GHz solidly mounted resonator in scandium aluminum nitride on SiO2/Ta2O5 Bragg reflector,” IEEE J. Microelectromech. Syst., vol. 33, no. 6, pp. 711–716, Dec. 2024, doi: 10.1109/JMEMS.2024.3472615.
  2. T. Zhang, Y.-W. Chang, O. Barrera, N. Ahmed, J. Kramer, and R. Lu, “Acoustic and electromagnetic co-modeling of piezoelectric devices at millimeter wave,” IEEE J. Microelectromech. Syst., vol. 33, no. 5, pp. 640–645, Oct. 2024, doi: 10.1109/JMEMS.2024.3431576.
  3. Z.-Q. Lee, T.-H. Hsu, Y.-C. Yu, C.-C. Lin, Y.-C. Liao, S. Cho, R. Lu, and M.-H. Li, “Spectrum-clean dispersion-engineered YX-LN/SiO2/Si wideband SH-SAW resonators with crossed interdigital transducers,” IEEE Trans. Electron Devices, vol. 71, no. 6, pp. 3880–3887, June 2024, doi: 10.1109/TED.2024.3392169.
  4. T.-H. Hsu, J. Campbell, J. Kramer, S. Cho, M.-H. Li, and R. Lu, “C-band lithium niobate on silicon carbide surface acoustic wave resonator with figure of merit of 124 at 6.5 GHz,” IEEE J. Microelectromech. Syst., vol. 33, no. 5, pp. 604–609, Oct. 2024, doi: 10.1109/JMEMS.2024.3423768.
  5. S. Cho, O. Barrera, J. Kramer, V. Chulukhadze, T.-H. Hsu, J. Campbell, I. Anderson, and R. Lu, “23.8 GHz acoustic filter in periodically poled piezoelectric film lithium niobate with 1.52 dB IL and 19.4% FBW,” IEEE Microw. Wireless Technol. Lett., vol. 34, no. 4, pp. 391–394, Apr. 2024, doi: 10.1109/LMWT.2024.3368354.
  6. W. D. Braun, E. Stolt, K. Nguyen, J. Segovia-Fernandez, S. Chakraborty, R. Lu, and J. Rivas-Davila, “A stacked piezoelectric converter using a segmented IDT lithium niobate resonator,” IEEE Open J. Power Electron., vol. 5, pp. 286–294, 2024, doi: 10.1109/OJPEL.2024.3365029.

2023

  1. S. Cho, O. Barrera, P. Simeoni, E. N. Marshall, J. Kramer, K. Motoki, T.-H. Hsu, V. Chulukhadze, M. Rinaldi, W. A. Doolittle, and R. Lu, “Millimeter wave thin-film bulk acoustic resonator in sputtered scandium aluminum nitride,” IEEE J. Microelectromech. Syst., vol. 32, no. 6, pp. 529–532, Dec. 2023, doi: 10.1109/JMEMS.2023.3321284.
  2. O. Barrera, S. Cho, L. Matto, J. Kramer, K. Huynh, V. Chulukhadze, Y.-W. Chang, M. S. Goorsky, and R. Lu, “Thin-film lithium niobate acoustic filter at 23.5 GHz with 2.38 dB IL and 18.2% FBW,” IEEE J. Microelectromech. Syst., vol. 32, no. 6, pp. 622–625, Dec. 2023, doi: 10.1109/JMEMS.2023.3314666.
  3. K. Nguyen, V. Chulukhadze, E. Stolt, W. Braun, J. Segovia-Fernandez, S. Chakraborty, J. Rivas-Davila, and R. Lu, “Near spurious-free thickness shear mode lithium niobate resonator for piezoelectric power conversion,” IEEE Trans. Ultrason., Ferroelectr., Freq. Control, 2023, doi: 10.1109/TUFFC.2023.3303123.
  4. D. Lee, S. Jahanbani, J. Kramer, R. Lu, and K. Lai, “Nanoscale imaging of super-high-frequency microelectromechanical resonators with femtometer sensitivity,” Nat. Commun., vol. 14, Art. no. 1188, Mar. 2023, doi: 10.1038/s41467-023-36936-9.

2021

  1. D. Lee, S. Meyer, S. Gong, R. Lu, and K. Lai, “Visualization of acoustic power flow in suspended thin-film lithium niobate phononic devices,” Appl. Phys. Lett., vol. 119, no. 21, Art. no. 214101, Nov. 2021, doi: 10.1063/5.0073530.
  2. E. Stolt, W. D. Braun, L. Gu, J. Segovia-Fernandez, S. Chakraborty, R. Lu, and J. Rivas-Davila, “Fixed-frequency control of piezoelectric resonator DC-DC converters for spurious mode avoidance,” IEEE Open J. Power Electron., vol. 2, pp. 582–590, 2021, doi: 10.1109/OJPEL.2021.3128509.
  3. R. Lu, Y. Yang, and S. Gong, “Acoustic loss of GHz higher-order Lamb waves in thin-film lithium niobate: A comparative study,” J. Microelectromech. Syst., vol. 30, no. 6, pp. 876–884, Dec. 2021, doi: 10.1109/JMEMS.2021.3114627.
  4. R. Lu and S. Gong, “RF acoustic microsystems based on suspended lithium niobate thin films: advances and outlook,” J. Micromech. Microeng., vol. 31, no. 11, Art. no. 114001, Nov. 2021, doi: 10.1088/1361-6439/ac288f.
  5. R. Lu, Y. Yang, and S. Gong, “Acoustic loss in thin-film lithium niobate: An experimental study,” J. Microelectromech. Syst., vol. 30, no. 4, pp. 632–641, Aug. 2021, doi: 10.1109/JMEMS.2021.3092724.
  6. A. E. Hassanien, R. Lu, and S. Gong, “Near-zero drift and high electromechanical coupling acoustic resonators at >3.5 GHz,” IEEE Trans. Microw. Theory Techn., vol. 69, no. 8, pp. 3706–3714, Aug. 2021, doi: 10.1109/TMTT.2021.3079497.
  7. R. Lu, Y. Yang, A. E. Hassanien, and S. Gong, “Gigahertz low-loss and high power handling acoustic delay lines using thin-film lithium-niobate-on-sapphire,” IEEE Trans. Microw. Theory Techn., vol. 69, no. 7, pp. 3246–3254, Jul. 2021, doi: 10.1109/TMTT.2021.3074918.
  8. W. D. Braun, E. A. Stolt, L. Gu, J. Segovia-Fernandez, S. Chakraborty, R. Lu, and J. M. Rivas-Davila, “Optimized resonators for piezoelectric power conversion,” IEEE Open J. Power Electron., vol. 2, pp. 212–224, 2021, doi: 10.1109/OJPEL.2021.3067020.
  9. S. Gong, R. Lu, Y. Yang, L. Gao, and A. E. Hassanien, “Microwave acoustic devices: recent advances and outlook,” IEEE J. Microw., vol. 1, no. 2, pp. 601–609, Apr. 2021, doi: 10.1109/JMW.2021.3064825.
  10. Y. Yang, L. Gao, R. Lu, and S. Gong, “Lateral spurious mode suppression in lithium niobate A1 resonators,” IEEE Trans. Ultrason., Ferroelectr., Freq. Control, vol. 68, no. 5, pp. 1930–1937, May 2021, doi: 10.1109/TUFFC.2020.3049084.
  11. S. R. Eisner, C. A. Chapin, R. Lu, Y. Yang, S. Gong, and D. G. Senesky, “A laterally vibrating lithium niobate MEMS resonator array operating at 500 °C in air,” Sensors, vol. 21, no. 1, Art. no. 149, 2021, doi: 10.3390/s21010149.
  12. R. Lu, Y. Yang, S. Link, and S. Gong, “Low-loss 5-GHz first-order antisymmetric mode acoustic delay lines in thin-film lithium niobate,” IEEE Trans. Microw. Theory Techn., vol. 69, no. 1, pp. 541–550, Jan. 2021, doi: 10.1109/TMTT.2020.3022942.
  13. J. Guan, J. Zhang, R. Lu, H. Seo, J. Zhou, S. Gong, and H. Hassanieh, “Efficient wideband spectrum sensing using MEMS acoustic resonators,” GetMobile: Mobile Comput. Commun., vol. 25, no. 3, pp. 23–27, 2021, doi: 10.1145/3511285.3511293.

Pre-2021

  1. R. Lu, M. Breen, A. E. Hassanien, Y. Yang, and S. Gong, “A piezoelectric micromachined ultrasonic transducer using thin-film lithium niobate,” J. Microelectromech. Syst., vol. 29, no. 6, pp. 1412–1414, Dec. 2020, doi: 10.1109/JMEMS.2020.3026547.
  2. Y. Yang, R. Lu, L. Gao, and S. Gong, “10–60-GHz electromechanical resonators using thin-film lithium niobate,” IEEE Trans. Microw. Theory Techn., vol. 68, no. 12, pp. 5211–5220, Dec. 2020, doi: 10.1109/TMTT.2020.3027694.
  3. R. Lu, Y. Yang, and S. Gong, “Low-loss unidirectional acoustic focusing transducer in thin-film lithium niobate,” IEEE Trans. Ultrason., Ferroelectr., Freq. Control, vol. 67, no. 12, pp. 2731–2737, Dec. 2020, doi: 10.1109/TUFFC.2020.3011624.
  4. R. Lu, Y. Yang, S. Link, and S. Gong, “Enabling higher-order Lamb wave acoustic devices with complementarily oriented piezoelectric thin films,” J. Microelectromech. Syst., vol. 29, no. 5, pp. 1332–1346, Oct. 2020, doi: 10.1109/JMEMS.2020.3007590.
  5. S. Zhang, R. Lu, H. Zhou, S. Link, Y. Yang, Z. Li, K. Huang, X. Ou, and S. Gong, “Surface acoustic wave devices using lithium niobate on silicon carbide,” IEEE Trans. Microw. Theory Techn., vol. 68, no. 9, pp. 3653–3666, Sept. 2020, doi: 10.1109/TMTT.2020.3006294.
  6. A. Kourani, R. Lu, and S. Gong, “A wideband oscillator exploiting multiple resonances in lithium niobate MEMS resonator,” IEEE Trans. Ultrason., Ferroelectr., Freq. Control, vol. 67, no. 9, pp. 1854–1866, Sept. 2020, doi: 10.1109/TUFFC.2020.2989623.
  7. R. Lu, Y. Yang, M.-H. Li, and S. Gong, “GHz low-loss acoustic RF couplers in lithium niobate thin film,” IEEE Trans. Ultrason., Ferroelectr., Freq. Control, vol. 67, no. 7, pp. 1448–1461, July 2020, doi: 10.1109/TUFFC.2020.2971196.
  8. R. Lu, Y. Yang, S. Link, and S. Gong, “A1 resonators in 128° Y-cut lithium niobate with electromechanical coupling of 46.4%,” J. Microelectromech. Syst., vol. 29, no. 3, pp. 313–319, June 2020, doi: 10.1109/JMEMS.2020.2982775.
  9. R. Lu, S. Link, and S. Gong, “A unidirectional transducer design for scaling GHz AlN-based RF microsystems,” IEEE Trans. Ultrason., Ferroelectr., Freq. Control, vol. 67, no. 6, pp. 1250–1257, June 2020, doi: 10.1109/TUFFC.2020.2968245.
  10. Y. Yang, R. Lu, and S. Gong, “High Q antisymmetric mode lithium niobate MEMS resonators with spurious mitigation,” J. Microelectromech. Syst., vol. 29, no. 2, pp. 135–143, Apr. 2020, doi: 10.1109/JMEMS.2020.2967784.
  11. M.-H. Li, R. Lu, T. Manzaneque, and S. Gong, “Low phase noise RF oscillators based on thin-film lithium niobate acoustic delay lines,” J. Microelectromech. Syst., vol. 29, no. 2, pp. 129–131, Apr. 2020, doi: 10.1109/JMEMS.2019.2961976.
  12. R. Lu, Y. Yang, S. Link, and S. Gong, “5-GHz antisymmetric mode acoustic delay lines in lithium niobate thin film,” IEEE Trans. Microw. Theory Techn., vol. 68, no. 2, pp. 573–589, Feb. 2020, doi: 10.1109/TMTT.2019.2949808.
  13. R. Lu, Y. Yang, M.-H. Li, T. Manzaneque, and S. Gong, “GHz broadband SH0 mode lithium niobate acoustic delay lines,” IEEE Trans. Ultrason., Ferroelectr., Freq. Control, vol. 67, no. 2, pp. 402–412, Feb. 2020, doi: 10.1109/TUFFC.2019.2943355.
  14. J. Moody, S. Gong, B. H. Calhoun, S. M. Bowers, A. Dissanayake, H. Bishop, R. Lu, N. Liu, D. Duvvuri, A. Gao, D. Truesdell, and N. S. Barker, “A highly reconfigurable bit-level duty-cycled TRF receiver achieving -106-dBm sensitivity and 33-nW average power consumption,” IEEE Solid-State Circuits Lett., vol. 2, no. 12, pp. 309–312, Dec. 2019, doi: 10.1109/LSSC.2019.2956419.
  15. M.-H. Li, C.-Y. Chen, R. Lu, Y. Yang, T. Wu, and S. Gong, “Temperature stability analysis of thin-film lithium niobate SH0 plate wave resonators,” J. Microelectromech. Syst., vol. 28, no. 5, pp. 799–809, Oct. 2019, doi: 10.1109/JMEMS.2019.2934126.
  16. Y. Yang, R. Lu, L. Gao, and S. Gong, “4.5 GHz lithium niobate MEMS filters with 10% fractional bandwidth for 5G front-ends,” J. Microelectromech. Syst., vol. 28, no. 4, pp. 575–577, Aug. 2019, doi: 10.1109/JMEMS.2019.2922935.
  17. R. Lu, S. Link, S. Zhang, M. Breen, and S. Gong, “Aluminum nitride Lamb wave delay lines with sub-6 dB insertion loss,” J. Microelectromech. Syst., vol. 28, no. 4, pp. 569–571, Aug. 2019, doi: 10.1109/JMEMS.2019.2919031.
  18. R. Lu, T. Manzaneque, Y. Yang, M.-H. Li, and S. Gong, “Gigahertz low-loss and wideband S0 mode lithium niobate acoustic delay lines,” IEEE Trans. Ultrason., Ferroelectr., Freq. Control, vol. 66, no. 8, pp. 1373–1386, Aug. 2019, doi: 10.1109/TUFFC.2019.2916259.
  19. T. Manzaneque, R. Lu, Y. Yang, and S. Gong, “Low-loss and wideband acoustic delay lines,” IEEE Trans. Microw. Theory Techn., vol. 67, no. 4, pp. 1379–1391, Apr. 2019, doi: 10.1109/TMTT.2019.2900246.
  20. R. Lu, M.-H. Li, Y. Yang, T. Manzaneque, and S. Gong, “Accurate extraction of large electromechanical coupling in piezoelectric MEMS resonators,” J. Microelectromech. Syst., vol. 28, no. 2, pp. 209–218, Apr. 2019, doi: 10.1109/JMEMS.2019.2892708.
  21. P. Bassirian, J. Moody, R. Lu, A. Gao, T. Manzaneque, A. Roy, N. S. Barker, B. H. Calhoun, S. Gong, and S. M. Bowers, “Nanowatt-level wakeup receiver front ends using MEMS resonators for impedance transformation,” IEEE Trans. Microw. Theory Techn., vol. 67, no. 4, pp. 1615–1627, Apr. 2019, doi: 10.1109/TMTT.2019.2894645.
  22. R. Lu, J. Krol, L. Gao, and S. Gong, “A frequency independent framework for synthesis of programmable non-reciprocal networks,” Sci. Rep., vol. 8, no. 1, Art. no. 14655, 2018, doi: 10.1038/s41598-018-32898-x.
  23. R. Lu, T. Manzaneque, Y. Yang, J. Zhou, H. Hassanieh, and S. Gong, “RF filters with periodic passbands for sparse Fourier transform-based spectrum sensing,” J. Microelectromech. Syst., vol. 27, no. 5, pp. 931–944, Oct. 2018, doi: 10.1109/JMEMS.2018.2864177.
  24. R. Lu, T. Manzaneque, Y. Yang, and S. Gong, “Lithium niobate phononic crystals for tailoring performance of RF laterally vibrating devices,” IEEE Trans. Ultrason., Ferroelectr., Freq. Control, vol. 65, no. 6, pp. 934–944, June 2018, doi: 10.1109/TUFFC.2018.2804861.
  25. T. Manzaneque, R. Lu, Y. Yang, and S. Gong, “Lithium niobate MEMS chirp compressors for near zero power wake-up radios,” J. Microelectromech. Syst., vol. 26, no. 6, pp. 1204–1215, Dec. 2017, doi: 10.1109/JMEMS.2017.2750176.
  26. R. Liu, S. Dev, Y. Zhong, R. Lu, W. Streyer, J. W. Allen, M. S. Allen, B. R. Wenner, S. Gong, and D. Wasserman, “Enhanced responsivity resonant RF photodetectors,” Opt. Express, vol. 24, no. 23, pp. 26044–26054, 2016, doi: 10.1364/OE.24.026044.
  27. Y.-H. Song, R. Lu, and S. Gong, “Analysis and removal of spurious response in SH0 lithium niobate MEMS resonators,” IEEE Trans. Electron Devices, vol. 63, no. 5, pp. 2066–2073, May 2016, doi: 10.1109/TED.2016.2543742.
  28. R. Liu, R. Lu, C. Roberts, S. Gong, J. W. Allen, M. S. Allen, B. R. Wenner, and D. Wasserman, “Multiplexed infrared photodetection using resonant RF circuits,” Appl. Phys. Lett., vol. 108, no. 6, Art. no. 061101, 2016, doi: 10.1063/1.4941431.
  29. Y. Lu, X. Wang, X. Wu, J. Qin, and R. Lu, “A non-resonant, gravity-induced micro triboelectric harvester to collect kinetic energy from low-frequency jiggling movements of human limbs,” J. Micromech. Microeng., vol. 24, no. 6, Art. no. 065010, 2014, doi: 10.1088/0960-1317/24/6/065010.

Peer-Reviewed Conference Publications

2026

  1. I. Anderson, X. Gao, Z. Yao, B. Kim, J. Kramer, D. Burghoff, and R. Lu, “Enabling lithium niobate phononic frequency combs via thermal engineering and design,” in Hilton Head Workshop, Hilton Head Island, SC, USA, May 31–Jun. 4, 2026.
  2. V. Chulukhadze, Z. Liu, L. Matto, Z. Yao, M. Liao, T.-H. Hsu, M. S. Goorsky, N. Hall, and R. Lu, “Thickness-field excited bimorph lithium niobate piezoelectric transducer,” in Hilton Head Workshop, Hilton Head Island, SC, USA, May 31–Jun. 4, 2026.
  3. T.-H. Hsu, Z. Liu, H. Gupta, Z. Yao, W. Wang, V. Chulukhadze, J. Kramer, N. Hall, and R. Lu, “Whip-mode flexural resonance in LiTaO3-on-SiO2 bimorph piezoelectric microresonator enabling near 60 m/s tip velocity,” in Hilton Head Workshop, Hilton Head Island, SC, USA, May 31–Jun. 4, 2026.
  4. J. Kramer, H. Gupta, T.-H. Hsu, and R. Lu, “Gigahertz acoustoelectric effect in monolayer graphene–lithium niobate heterostructures,” in Hilton Head Workshop, Hilton Head Island, SC, USA, May 31–Jun. 4, 2026.
  5. Z. Yao, I. Anderson, J. Kramer, T.-H. Hsu, L. Matto, M. S. Goorsky, and R. Lu, “Bimorph lithium niobate thickness-shear overtone resonator with high Q above 20,000 at 779 MHz,” in Hilton Head Workshop, Hilton Head Island, SC, USA, May 31–Jun. 4, 2026.
  6. J. Campbell, T.-H. Hsu, L. Matto, M. S. Goorsky, and R. Lu, “12.3 GHz longitudinal mode surface acoustic wave resonator in lithium niobate on silicon carbide,” in Hilton Head Workshop, Hilton Head Island, SC, USA, May 31–Jun. 4, 2026.
  7. Y. Yu, R. Yin, Z. Sakotic, I. Anderson, S. Guadagnini, Y. Wang, I. Christen, R. Lu, M. Povinelli, D. Wasserman, and M. Yu, “Monolithic room-temperature mid-infrared detector based on thin-film lithium niobate optomechanical resonator,” in Proc. Conf. Lasers Electro-Opt. (CLEO), Charlotte, NC, USA, May 17–21, 2026.
  8. R. Yin, Y. Yu, I. Christen, R. Lu, and M. Yu, “Opto-electro-mechanical oscillator on thin-film lithium niobate,” in Proc. Conf. Lasers Electro-Opt. (CLEO), Charlotte, NC, USA, May 17–21, 2026.
  9. Z. Yao, C. Daniel, K. Pan, T.-H. Hsu, H. Chang, M. S. Goorsky, J. Rivas-Davila, and R. Lu, “Single-crystal AlN wafer-based bulk acoustic resonators for piezoelectric power conversion,” in Proc. IEEE Int. Frequency Control Symp. (IFCS), Tampa, FL, USA, May 10–13, 2026.
  10. T. Anusorn, T.-H. Hsu, Y. Ma, and R. Lu, “Q-enhanced SH-SAW ladder filter in thin-film lithium tantalate using Bartlett apodization,” in Proc. IEEE Int. Frequency Control Symp. (IFCS), Tampa, FL, USA, May 10–13, 2026.
  11. Z. Yao, H. Chang, E. Stolt, C. Daniel, T.-H. Hsu, J. Rivas-Davila, and R. Lu, “Radial mode lithium niobate Rosen transformer,” in Proc. IEEE 39th Int. Conf. Micro Electro Mechanical Syst. (MEMS), Salzburg, Austria, Jan. 25–29, 2026.
  12. B. Kim, I. Anderson, T.-H. Hsu, Z. Yao, M. Chaudhari, S. Cho, and R. Lu, “Residual stress anisotropy in thin-film lithium niobate for stress-managed MEMS,” in Proc. IEEE 39th Int. Conf. Micro Electro Mechanical Syst. (MEMS), Salzburg, Austria, Jan. 25–29, 2026.

2025

  1. S. Cano, C. Caballero, M. Faura, O. Barrera, R. Lu, J. Verdú, and P. de Paco, “Enhanced modeling of wideband acoustic wave ladder filters,” in Proc. IEEE Int. Ultrason. Symp. (IUS), Utrecht, Netherlands, Sept. 15–18, 2025, doi: 10.1109/IUS62464.2025.11201248.
  2. Z. Yao, V. Chulukhadze, Z. Liu, X. Niu, T.-H. Hsu, B. Kim, N. Hall, and R. Lu, “Bimorph lithium niobate piezoelectric micromachined ultrasonic transducer,” in Proc. IEEE Int. Ultrason. Symp. (IUS), Utrecht, Netherlands, Sept. 15–18, 2025.
  3. G. Giribaldi, F. B. Ayed, K. Saha, L. Colombo, O. Barrera, R. Lu, and M. Rinaldi, “Beyond CLMRs: advanced bi-dimensional resonator topologies to enhance electromechanical coupling and power handling,” in Proc. IEEE Int. Freq. Control Symp. Eur. Freq. Time Forum (IFCS-EFTF), Querétaro, Mexico, May 12–16, 2025.
  4. R. Yin, Y. Yu, X. Ren, C.-H. Lee, Y. Liang, I. Anderson, J. Kramer, R. Lu, and M. Yu, “Intrinsic frequency noise of the thin-film lithium niobate platforms,” in Proc. Conf. Lasers Electro-Opt. (CLEO), Long Beach, CA, USA, May 4–9, 2025.
  5. Y. Yu, R. Yin, I. Anderson, J. Kramer, C.-H. Lee, X. Ren, C. Cheung, R. Lu, and M. Yu, “Room-temperature optomechanical-resonator-based thermal sensor on thin-film lithium niobate,” in Proc. Conf. Lasers Electro-Opt. (CLEO), Long Beach, CA, USA, May 4–9, 2025.
  6. V. Chulukhadze, Z. Yao, N. Ahmed, Z. Liu, X. Niu, T.-H. Hsu, N. Hall, and R. Lu, “Lithium niobate planar single-layer piezoelectric transducer with no passive layer,” in Proc. 23rd Int. Conf. Solid-State Sensors, Actuators and Microsystems (Transducers), Orlando, FL, USA, Jun. 29–Jul. 3, 2025, pp. 1600–1603, doi: 10.1109/Transducers61432.2025.11109260.
  7. T.-H. Hsu, K. Saha, J. Kramer, O. Barrera, R. Zhang, P. Simeoni, M. Rinaldi, and R. Lu, “Ku-band AlScN-on-diamond SAW resonators with phase velocity above 8600 m/s,” in Proc. 23rd Int. Conf. Solid-State Sensors, Actuators and Microsystems (Transducers), Orlando, FL, USA, Jun. 29–Jul. 3, 2025, pp. 172–175, doi: 10.1109/Transducers61432.2025.11109438.
  8. S. Cho, Y. Wang, E. Kwon, R. Zhang, L. Matto, O. Barrera, M. Liao, J. Kramer, T.-H. Hsu, V. Chulukhadze, I. Anderson, M. S. Goorsky, and R. Lu, “Thin-film scandium aluminum nitride bulk acoustic resonator with high Q of 208 and k2 of 9.5% at 12.5 GHz,” in Proc. 23rd Int. Conf. Solid-State Sensors, Actuators and Microsystems (Transducers), Orlando, FL, USA, Jun. 29–Jul. 3, 2025, pp. 1823–1826, doi: 10.1109/Transducers61432.2025.11110376.
  9. Z. Yao, C. Daniel, E. Stolt, V. Chulukhadze, J. Rivas-Davila, and R. Lu, “Lithium tantalate bulk acoustic resonator for piezoelectric power conversion,” in Proc. 23rd Int. Conf. Solid-State Sensors, Actuators and Microsystems (Transducers), Orlando, FL, USA, Jun. 29–Jul. 3, 2025, doi: 10.1109/Transducers61432.2025.11110984.
  10. M. Chaudhari, N. Ahmed, V. Tallavajhula, J. Campbell, Y. Wang, Z. Du, and R. Lu, “Thermal resilience of suspended thin-film lithium niobate acoustic resonators up to 550 °C,” in Proc. 23rd Int. Conf. Solid-State Sensors, Actuators and Microsystems (Transducers), Orlando, FL, USA, Jun. 29–Jul. 3, 2025, pp. 1859–1862, doi: 10.1109/Transducers61432.2025.11109295.
  11. V. Chulukhadze, Y. Wang, I. Anderson, J. Kramer, S. Cho, and R. Lu, “Miniature high-coupling lithium niobate thin-film bulk acoustic wave resonators at 10–30 GHz,” in Proc. IEEE Int. Microw. Symp. (IMS), San Francisco, CA, USA, Jun. 15–20, 2025, pp. 782–785, doi: 10.1109/IMS40360.2025.11103794.
  12. Z.-Q. Lee, S.-Y. Huang, T.-H. Hsu, J. Campbell, J. Kramer, R. Lu, and M.-H. Li, “6 GHz lithium niobate on insulator low-loss SAW delay line adapting non-leaky composite waveguide mode,” in Proc. IEEE 38th Int. Conf. Micro Electro Mechanical Syst. (MEMS), Kaohsiung, Taiwan, Jan. 19–23, 2025, pp. 1149–1152, doi: 10.1109/MEMS61431.2025.10917993.
  13. S.-Y. Huang, Z.-Q. Lee, T.-H. Hsu, J. Campbell, J. Kramer, R. Lu, and M.-H. Li, “A 4.3 GHz lithium niobate on insulator wideband surface acoustic wave delay line with multi-mode composition,” in Proc. IEEE 38th Int. Conf. Micro Electro Mechanical Syst. (MEMS), Kaohsiung, Taiwan, Jan. 19–23, 2025, pp. 1153–1156, doi: 10.1109/MEMS61431.2025.10917467.

2024

  1. V. Chulukhadze, E. Stolt, C. Daniel, J. Rivas-Davila, and R. Lu, “Lithium niobate resonators for piezoelectric power conversion: spurious mode suppression via an active ring,” in Proc. IEEE Ultrason., Ferroelectr., Freq. Control Joint Symp. (UFFC-JS), Taipei, Taiwan, Sept. 22–26, 2024.
  2. J. Campbell, I. Anderson, T.-H. Hsu, O. Barrera, J. Kramer, S. Cho, V. Chulukhadze, G. Latham, M.-H. Li, and R. Lu, “21.4 GHz surface acoustic wave resonator with 11,400 m/s phase velocity in thin-film lithium niobate on silicon carbide,” in Proc. IEEE Ultrason., Ferroelectr., Freq. Control Joint Symp. (UFFC-JS), Taipei, Taiwan, Sept. 22–26, 2024, pp. 1–4, doi: 10.1109/UFFC-JS60046.2024.10793800.
  3. I. Anderson, T.-H. Hsu, V. Chulukhadze, J. Kramer, S. Cho, O. Barrera, J. Campbell, M.-H. Li, and R. Lu, “Low-loss higher-order cross-sectional Lamé mode SAW devices in 10-20 GHz range,” in Proc. IEEE Ultrason., Ferroelectr., Freq. Control Joint Symp. (UFFC-JS), Taipei, Taiwan, Sept. 22–26, 2024.
  4. S. Cho, O. Barrera, H. Bansal, M. Liao, E.-Y. Wang, V. Chulukhadze, J. Kramer, J. Campbell, T.-H. Hsu, I. Anderson, M. S. Goorsky, and R. Lu, “13 GHz acoustic resonator with Q of 600 in high-quality thin-film aluminum nitride,” in Proc. IEEE Ultrason., Ferroelectr., Freq. Control Joint Symp. (UFFC-JS), Taipei, Taiwan, Sept. 22–26, 2024.
  5. V. Chulukhadze, J. Kramer, T.-H. Hsu, O. Barrera, I. Anderson, S. Cho, J. Campbell, and R. Lu, “2 to 16 GHz fundamental symmetric-mode acoustic resonators in piezoelectric thin-film lithium niobate,” in Hilton Head Workshop 2024, Hilton Head Island, SC, USA, June 2–6, 2024. (Best Student Poster Award)
  6. J. Kramer, T.-H. Hsu, J. Campbell, and R. Lu, “Ultra-wideband tapered transducers in thin-film lithium niobate on silicon carbide,” in Hilton Head Workshop 2024, Hilton Head Island, SC, USA, June 2–6, 2024.
  7. T.-H. Hsu, J. Campbell, J. Kramer, S. Cho, Z.-Q. Lee, M.-H. Li, and R. Lu, “Thin-film lithium niobate on insulator surface acoustic wave devices for 6G centimeter bands,” in Proc. IEEE MTT-S Int. Conf. Microw. Acoust. Mech. (IC-MAM), Chengdu, China, May 13–15, 2024, pp. 117–120, doi: 10.1109/IC-MAM60575.2024.10538487.
  8. J. Kramer, O. Barrera, S. Cho, V. Chulukhadze, T.-H. Hsu, and R. Lu, “Experimental study of periodically poled piezoelectric film lithium niobate resonator at cryogenic temperatures,” in Proc. IEEE/MTT-S Int. Microw. Symp. (IMS), Washington, DC, USA, June 16–21, 2024, pp. 154–157, doi: 10.1109/IMS40175.2024.10600212.
  9. C. Daniel, E. Stolt, W. Braun, R. Lu, and J. Rivas-Davila, “Nonlinear losses and material limits of piezoelectric resonators for DC-DC converters,” in Proc. IEEE Appl. Power Electron. Conf. Expo. (APEC), Long Beach, CA, USA, Feb. 25–29, 2024, pp. 1560–1565, doi: 10.1109/APEC48139.2024.10509514.
  10. O. Barrera, S. Cho, J. Kramer, V. Chulukhadze, J. Campbell, and R. Lu, “38.7 GHz thin-film lithium niobate acoustic filter,” in Proc. IEEE Int. Microw. Filter Workshop (IMFW), Cocoa Beach, FL, USA, Feb. 21–23, 2024.
  11. S. Cho, O. Barrera, P. Simeoni, E. Y. Wang, J. Kramer, V. Chulukhadze, J. Campbell, M. Rinaldi, and R. Lu, “Millimeter-wave thin-film bulk acoustic resonator in sputtered scandium aluminum nitride using platinum electrodes,” in Proc. IEEE 37th Int. Conf. Micro Electro Mech. Syst. (MEMS), Austin, TX, USA, Jan. 21–25, 2024, doi: 10.1109/MEMS58180.2024.10439299. (Best Student Poster Award Finalist)
  12. T.-H. Hsu, Z.-Q. Lee, C.-H. Tsai, V. Chulukhadze, C.-C. Lin, Y.-C. Yu, R. Lu, and M.-H. Li, “A dispersion-engineered YX-LN/SiO2/sapphire SH-SAW resonator for enhanced electromechanical coupling and Rayleigh mode suppression,” in Proc. IEEE 37th Int. Conf. Micro Electro Mech. Syst. (MEMS), Austin, TX, USA, Jan. 21–25, 2024, pp. 27–30, doi: 10.1109/MEMS58180.2024.10439591. (Best Student Poster Award Finalist)
  13. O. Barrera, S. Cho, K. Hyunh, J. Kramer, M. Liao, V. Chulukhadze, L. Matto, M. S. Goorsky, and R. Lu, “Transferred thin-film lithium niobate as millimeter-wave acoustic filter platforms,” in Proc. IEEE 37th Int. Conf. Micro Electro Mech. Syst. (MEMS), Austin, TX, USA, Jan. 21–25, 2024. (Best Student Poster Award Finalist)

2023

  1. J. Kramer, K. Huynh, R. Tetro, L. Matto, O. Barrera, V. Chulukhadze, S. Cho, D. Luccioni, L. Colombo, M. S. Goorsky, and R. Lu, “Trilayer periodically poled piezoelectric film lithium niobate resonator,” in Proc. IEEE Int. Ultrason. Symp. (IUS), Montreal, QC, Canada, Sept. 3–8, 2023, pp. 1026–1029, doi: 10.1109/IUS51837.2023.10306831.
  2. V. Chulukhadze, J. Kramer, N. Ahmed, O. Barrera, S. Cho, and R. Lu, “Frequency tuning of suspended millimeter wave lithium niobate acoustic resonators by ion beam assisted argon gas cluster etching,” in Proc. IEEE Int. Ultrason. Symp. (IUS), Montreal, QC, Canada, Sept. 3–8, 2023, pp. 1833–1836.
  3. O. Barrera, J. Kramer, R. Tetro, S. Cho, V. Chulukhadze, L. Colombo, and R. Lu, “Fundamental antisymmetric mode acoustic resonator in periodically poled piezoelectric film lithium niobate,” in Proc. IEEE Int. Ultrason. Symp. (IUS), Montreal, QC, Canada, Sept. 3–8, 2023, pp. 1868–1871, doi: 10.1109/IUS51837.2023.10307135.
  4. S. Cho, O. Barrera, P. Simeoni, J. Kramer, V. Chulukhadze, W. Zhao, and R. Lu, “55.4 GHz bulk acoustic resonator in thin-film scandium aluminum nitride,” in Proc. IEEE Int. Ultrason. Symp. (IUS), Montreal, QC, Canada, Sept. 3–8, 2023, pp. 1661–1664, doi: 10.1109/IUS51837.2023.10307629.
  5. J. Kramer, S. Cho, K. Huynh, V. Chulukhadze, O. Barrera, M. S. Goorsky, and R. Lu, “Extracting acoustic loss of high-order Lamb modes at millimeter-wave using acoustic delay lines,” in Proc. IEEE/MTT-S Int. Microw. Symp. (IMS), San Diego, CA, USA, June 11–16, 2023, pp. 907–910.
  6. V. Chulukhadze, K. Huynh, J. Kramer, M. Liao, S. Cho, L. Matto, O. Barrera, C. Cui, M. S. Goorsky, and R. Lu, “Frequency scaling millimeter wave acoustic resonators using ion beam trimmed lithium niobate,” in Proc. Joint Conf. Eur. Freq. Time Forum IEEE Int. Freq. Control Symp. (EFTF/IFCS), Toyama, Japan, May 15–19, 2023, pp. 421–424.
  7. J. Kramer, V. Chulukhadze, K. Huynh, O. Barrera, M. Liao, S. Cho, L. Matto, M. S. Goorsky, and R. Lu, “Thin-film lithium niobate acoustic resonator with high Q of 237 and k2 of 5.1% at 50.74 GHz,” in Proc. Joint Conf. Eur. Freq. Time Forum IEEE Int. Freq. Control Symp. (EFTF/IFCS), Toyama, Japan, May 15–19, 2023, pp. 361–364, doi: 10.1109/EFTF/IFCS57587.2023.10272149.
  8. K. Nguyen, E. Stolt, W. Braun, V. Chulukhadze, J. Segovia-Fernandez, S. Chakraborty, J. Rivas-Davila, and R. Lu, “Spurious-free lithium niobate bulk acoustic resonator for piezoelectric power conversion,” in Proc. Joint Conf. Eur. Freq. Time Forum IEEE Int. Freq. Control Symp. (EFTF/IFCS), Toyama, Japan, May 15–19, 2023, pp. 199–202, doi: 10.1109/EFTF/IFCS57587.2023.10272177.
  9. S. Cho, J. Guida, J. Kramer, O. Barrera, V. Chulukhadze, C. Cui, S. Ghosh, and R. Lu, “Analysis of 5–10 GHz higher-order Lamb acoustic waves in thin-film scandium aluminum nitride,” in Proc. Joint Conf. Eur. Freq. Time Forum IEEE Int. Freq. Control Symp. (EFTF/IFCS), Toyama, Japan, May 15–19, 2023, pp. 345–348.

2022

  1. J. Kramer, S. Cho, M. E. Liao, K. Huynh, O. Barrera, L. Matto, M. S. Goorsky, and R. Lu, “57 GHz acoustic resonator with k2 of 7.3% and Q of 56 in thin-film lithium niobate,” in IEDM Tech. Dig., San Francisco, CA, USA, Dec. 3–7, 2022, pp. 382–385.
  2. K. Nguyen, E. Stolt, W. Braun, J. Segovia-Fernandez, S. Chakraborty, J. Rivas, and R. Lu, “Near-spurious-free lithium niobate resonator for piezoelectric power conversion with Q of 3500 and kt2 of 45%,” in Proc. IEEE Int. Ultrason. Symp. (IUS), Venice, Italy, Oct. 10–13, 2022, pp. 546–549, doi: 10.1109/IUS54386.2022.9958319.
  3. J. Kramer, D. Lee, S. Cho, S. Jahanbani, K. Lai, and R. Lu, “Acoustic wave focusing lens at radio frequencies in thin-film lithium niobate,” in Proc. IEEE Int. Conf. Microw. Acoust. Mech. (IC-MAM), Munich, Germany, Jul. 18–20, 2022, pp. 9–12, doi: 10.1109/ICMAM55200.2022.9855343.
  4. S. Ghosh, S. Cho, and R. Lu, “Experimental observation of electron-phonon interaction in semiconductor on solidly mounted thin-film lithium niobate,” in Proc. IEEE Int. Conf. Microw. Acoust. Mech. (IC-MAM), Munich, Germany, Jul. 18–20, 2022, pp. 90–93.
  5. S. Cho, Y. Wang, J. Kramer, K. Nguyen, and R. Lu, “Acoustic delay lines in thin-film lithium niobate on silicon carbide,” in Proc. IEEE/MTT-S Int. Microw. Symp. (IMS), Denver, CO, USA, Jun. 19–24, 2022, pp. 809–812.
  6. S. Jog, J. Guan, S. Madani, R. Lu, S. Gong, D. Vasisht, and H. Hassanieh, “Enabling IoT self-localization using ambient 5G signals,” in Proc. 19th USENIX Symp. Netw. Syst. Des. Implement. (NSDI 22), Renton, WA, USA, Apr. 4–6, 2022, pp. 1011–1026.

2021

  1. R. Lu and S. Gong, “Power flow angles of GHz propagating acoustic waves in thin-film lithium niobate,” in Proc. IEEE Int. Ultrason. Symp. (IUS), 2021, doi: 10.1109/IUS52206.2021.9593653.
  2. R. Lu and S. Gong, “A 15.8 GHz A6 mode resonator with Q of 720 in complementarily oriented piezoelectric lithium niobate thin films,” in Proc. 2021 Joint Conf. Eur. Freq. Time Forum and IEEE Int. Freq. Control Symp. (EFTF/IFCS), 2021, doi: 10.1109/EFTF/IFCS52194.2021.9604327.
  3. R. Lu, Y. Yang, A. E. Hassanien, and S. Gong, “Low-loss and high power handling acoustic delay lines using thin-film lithium niobate on sapphire,” in Proc. IEEE/MTT-S Int. Microw. Symp. (IMS), pp. 270–273, 2021, doi: 10.1109/IMS19712.2021.9574829.

Pre-2021

  1. R. Lu, Y. Yang, and S. Gong, “5 GHz A1 mode lateral overtone bulk acoustic resonators in thin-film lithium niobate,” in Proc. IEEE Int. Ultrason. Symp. (IUS), 2020, doi: 10.1109/IUS46767.2020.9251334.
  2. R. Lu, M. Breen, A. E. Hassanien, Y. Yang, and S. Gong, “Thin-film lithium niobate based piezoelectric micromachined ultrasound transducers,” in Proc. IEEE Int. Ultrason. Symp. (IUS), 2020, doi: 10.1109/IUS46767.2020.9251707.
  3. R. Lu, Y. Yang, S. Link, and S. Gong, “5.4 GHz acoustic delay lines in lithium niobate thin film with 3 dB insertion loss,” in Proc. IEEE MTT-S Int. Microw. Symp. (IMS), 2020, pp. 245–248, doi: 10.1109/IMS30576.2020.9223789.
  4. R. Lu, Y. Yang, M. Breen, M.-H. Li, and S. Gong, “8.5 GHz and 11.5 GHz acoustic delay lines using higher-order Lamb modes in lithium niobate thin film,” in Proc. IEEE Int. Conf. Micro Electro Mechanical Syst. (MEMS), 2020, pp. 1242–1245, doi: 10.1109/MEMS46641.2020.9056190.
  5. R. Lu, Y. Yang, M. Breen, M.-H. Li, and S. Gong, “5 GHz acoustic delay lines using antisymmetric mode in lithium niobate thin film,” in Proc. IEEE Int. Ultrason. Symp. (IUS), 2019, pp. 265–268, doi: 10.1109/ULTSYM.2019.8926305.
  6. R. Lu, T. Manzaneque, Y. Yang, M.-H. Li, and S. Gong, “Towards digitally addressable delay synthesis: GHz low-loss acoustic delay elements from 20 ns to 900 ns,” in Proc. IEEE Int. Conf. Micro Electro Mechanical Syst. (MEMS), 2019, pp. 121–124, doi: 10.1109/MEMSYS.2019.8870729.
  7. R. Lu, T. Manzaneque, Y. Yang, and S. Gong, “S0-mode lithium niobate acoustic delay lines with 1 dB insertion loss,” in Proc. IEEE Int. Ultrason. Symp. (IUS), 2018, doi: 10.1109/ULTSYM.2018.8580062.
  8. R. Lu, T. Manzaneque, Y. Yang, J. Zhou, H. Al-Hassanieh, and S. Gong, “A radio frequency comb filter for sparse Fourier transform-based spectrum sensing,” in Proc. IEEE Int. Ultrason. Symp. (IUS), 2018, doi: 10.1109/ULTSYM.2018.8579645.
  9. R. Lu, T. Manzaneque, Y. Yang, A. Gao, L. Gao, and S. Gong, “A radio frequency non-reciprocal network based on switched low-loss acoustic delay lines,” in Proc. IEEE Int. Ultrason. Symp. (IUS), 2018, doi: 10.1109/ULTSYM.2018.8579758.
  10. R. Lu, T. Manzaneque, Y. Yang, A. Kourani, and S. Gong, “Lithium niobate lateral overtone resonators for low power frequency-hopping applications,” in Proc. IEEE Int. Conf. Micro Electro Mechanical Syst. (MEMS), 2018, pp. 751–754, doi: 10.1109/MEMSYS.2018.8346664.
  11. R. Lu, T. Manzaneque, Y. Yang, and S. Gong, “Exploiting parallelism in resonators for large voltage gain in low power wake up radio front ends,” in Proc. IEEE Int. Conf. Micro Electro Mechanical Syst. (MEMS), 2018, pp. 747–750, doi: 10.1109/MEMSYS.2018.8346663.
  12. R. Lu, T. Manzaneque, Y. Yang, and S. Gong, “Lithium niobate phononic crystals for radio frequency SH0 waves,” in Proc. Joint Conf. Eur. Freq. Time Forum and IEEE Int. Freq. Control Symp. (EFTF/IFCS), 2017, pp. 846–849, doi: 10.1109/FCS.2017.8089051.
  13. R. Lu, M. Breen, A. Gao, and S. Gong, “Piezoelectric RF resonant voltage amplifiers for IoT applications,” in Proc. IEEE MTT-S Int. Microw. Symp. (IMS), 2016, doi: 10.1109/MWSYM.2016.7540065.
  14. R. Lu, A. Gao, and S. Gong, “Deciphering intermodulation in AlN laterally vibrating resonators,” in Proc. IEEE Int. Conf. Micro Electro Mechanical Syst. (MEMS), 2016, pp. 671–674, doi: 10.1109/MEMSYS.2016.7421715.
  15. R. Lu and S. Gong, “Study of thermal nonlinearity in lithium niobate-based MEMS resonators,” in Proc. 18th Int. Conf. Solid-State Sensors, Actuators and Microsystems (Transducers), 2015, pp. 1993–1996, doi: 10.1109/TRANSDUCERS.2015.7181345.
  16. R. Lu, A. Gao, and S. Gong, “Parametric excitation in geometrically optimized AlN contour mode resonators,” in Proc. Joint Conf. IEEE Int. Freq. Control Symp. and Eur. Freq. Time Forum (IFCS-EFTF), 2015, pp. 1–4, doi: 10.1109/FCS.2015.7138781.