November 2024

• Three collaborated papers were accepted to GOMACTECH 2025.
• Our review paper “RF Acoustic Microsystems Based on Suspended Lithium Niobate Thin Films: Advances and Outlook” received IOP Top Cited Paper Awards 2024
• Congrats to Vato for receiving the prestigious junior Ben Streetman Award for 2024-2025

October 2024

• Congrats to Joshua and Ian for receiving Dean’s Prestigious Fellowship Supplement!
• Our collaborated works with Prof. Ming-Huang Li are accepted to IEEE MEMS 25:
  • 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., the 38th IEEE Micro Electro Mechanical Systems (MEMS’25), Kaohsiung, Taiwan, Jan. 19-23, 2025.
  • 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., the 38th IEEE Micro Electro Mechanical Systems (MEMS’25), Kaohsiung, Taiwan, Jan. 19-23, 2025.

September 2024

• Prof. Lu received the IEEE Ultrasonics Early Career Investigator Award
• Omar’s paper was accepted by IEEE JMEMS. Congrats. 18 GHz Solidly Mounted Resonator in Scandium Aluminum Nitride on SiO2/Ta2O5 Bragg Reflector

August 2024

• Three papers are accepted to TRF Topical Workshop
  • V. Chulukhadze, X. Niu, L. Matto, Y. Wang, Z. Liu, E. Stolt, M. S. Goorsky, N. Hall, and R. Lu, “Lateral Field Excited Lithium Niobate for High Bandwidth Transducers“, TRF Topical Workshop on Hybrid and Heterogenous Microsystem 2024
  • Y. Wang, O. Barrera, N. Ravi, K. Saha, S. Dasgupta, E. Kwon, S. Cho, L. Matto, P. Simeoni, J. Hou, M. Rinaldi, M. S. Goorsky, and R. Lu, “Solidly Mounted Resonator Platform Using ScAlN on Bottom Electrode on Bragg Reflector“, TRF Topical Workshop on Hybrid and Heterogenous Microsystem 2024
  • Y. Yu, R. Yin, C. Lee, X. Ren, I. Anderson, J. Kramer, R. Lu, and M. Yu, “Room-temperature optomechanical-resonator-based sensor on thin film lithium niobate“, TRF Topical Workshop on Hybrid and Heterogenous Microsystem 2024

July 2024

• Welcome, Taran, to our team!
• Two papers were accepted to IEEE JMEMS. Congrats.
  • 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 JMEMS, 2024
  • 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 JMEMS, 2024

June 2024

• Congratulations to Sinwoo for receiving the IEEE IMS 2024 third-place Best Student Paper Award. Great achievement! This is the top 3 out of 306 student papers at IMS.
• Vato received the Hilton Head 2024 Best Poster Award. Congratulations!
• Nine of our papers are accepted as Lecture Presentations by IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium (UFFC-S) 2024. Congratulations!
  • V. Chulukhadze, E. Stolt, J. Rivas, and R. Lu, “Lithium Niobate Resonators for Piezoelectric Power Conversion: Spurious Mode Suppression via an Active Ring“, IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium (UFFC-JS), 2024
  • J. Kramer, O. Barrera, B. Bosworth, N. Jungwirth, L. Matto, S. Cho, N. Orloff, M. Goorsky, and R. Lu, “Piezoelectric Acoustics Exceeding 100 GHz“, IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium (UFFC-JS), 2024
  • O. Barrera, S. Cho, J. Kramer, V. Chulukhadze, T.-H. Hsu, J. Campbell, I. Anderson, and R. Lu, “19.3 GHz Acoustic Filter with 2.2 dB IL, 8.5% FBW, and 47 dB Close-in Rejection in Trilayer Periodically Poled Piezoelectric Thin-Film Lithium Niobate“, IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium (UFFC-JS), 2024
  • 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“, IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium (UFFC-JS), 2024
  • T.-H. Hsu, J. Campbell, J. Kramer, S. Cho, Z.-Q. Lee, M.-H. Li, and R. Lu, “22.4 GHz Longitudinal SAW Resonator with k2 of 3.4% and Q of 192“, IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium (UFFC-JS), 2024
  • I. Anderson, T.-H. Tsu, 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“, IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium (UFFC-JS), 2024
  • V. Chulukhadze, J. Kramer, O. Barrera, N. Ahmed, I. Anderson, J. Campbell, S. Cho, and R. Lu, “High Figure of Merit A3 Mode Lithium Niobate Acoustic Resonators from 30 to 60 GHz“, IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium (UFFC-JS), 2024
  • 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“, IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium (UFFC-JS), 2024
  • R. Lu, “Scaling of Acoustic Resonators Into Millimeter Wave Regime Using Piezoelectric Thin Films“, IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium (UFFC-JS), 2024 (Invited)

May 2024

• Congratulations to Sinwoo for receiving the IEEE IMS 2024 Best Student Paper Finalist. Great achievement!

April 2024

• Dr. Lu received the Junior Faculty Excellence in Teaching Award from Chandra Family Department of Electrical and Computer Engineering at UT Austin. It is a great honor!
• Welcome Rui to the team!
• Congratulations to Ian for receiving the NASA Space Technology Graduate Research (NSTRO) Fellowship!

March 2024

• Congratulations to Vato for receiving the Hilton Head 2024 Best Poster Paper Finalist.
• Congratulations to Joshua for receiving the National Defense Science and Engineering Graduate (NDSEG) Fellowship!
• Kevin’s paper is accepted to IEEE ICMAM 2024. Congrats
  • T.-H. Hsu, J. Campbell, J. Kramer, S. Cho, Z.-Q. Lee, M.-H. Li, R. Lu, “Thin-film Lithium Niobate on Insulator Surface Acoustic Wave Devices for 6G Centimeter Bands“, IEEE International Conference on Microwave Acoustics & Mechanics (IC-MAM), 2024

Feb. 2024

• Two papers were accepted to Hilton Head 2024. Congrats to Vato and Jack!
  • 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
  • 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
• Omar won the second place Best Paper Award at IEEE IMFW 2024. Congratulations!
• Sinwoo’s IEEE IMS 2024 paper is invited to and accepted by IEEE Microwave and Wireless Technology Letters. Congrats.
• Hanson receives the Mentoring Fellowship from UT.
• Our collaborated paper was accepted to IEEE OJPE
  • 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,” in IEEE Open Journal of Power Electronics
• Two papers were accepted to IEEE IMS 2024. Congrats to Jack and Sinwoo!
  • 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,“ IEEE International Microwave Symposium (IMS), June 2024.
  • 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 International Microwave Symposium (IMS), June 2024.

January 2024

• Welcome Hanson to the team! Hanson is awarded the Mentoring Fellowship by UT ECE. Congrats.
• Prof. Lu receive the NSF Career Award.
• Three papers are selected as Best Student Paper Finalists in IEEE MEMS 2024! Congratulations to Kevin, Sinwoo, and Omar!
• Our paper is highlighted by IEEE Transactions on Power Electronics (TPEL) as Highlighted Papers from February 2024!

November 2023

• Omar’s paper is accepted. Congrat!
  • O. Barrera, S. Cho, J. Kramer, V. Chulukhadze, J. Campbell, and R. Lu “38.7 GHz Thin Film Lithium Niobate Acoustic Filter“, IEEE International Microwave Filter Workshop (IMFW), 2024
• Jack’s paper has been accepted by GOMACTech 2024. Congratulations!
• Our collaborated work “A Spurious-Free Piezoelectric Resonator Based 3.2 kW DC-DC Converter for EV On-Board Chargers” is accepted by IEEE Transactions on Power Electronics. Congrats!
• Congratulations to Jack Kramer for receiving the prestigious junior Ben Streetman Award for 2023-2024!
• Three of our papers have been accepted to IEEE MEMS 2024! Congratulations to Kevin, Sinwoo, and Omar!
  • S. Cho, O. Barrera, P. Simeoni, E. Wang, J. Kramer, V. Chulukhadze, M. Rinaldi, and R. Lu, “Millimeter Wave Thin-Film Bulk Acoustic Resonator in Sputtered Scandium Aluminum Nitride Using Platinum Electrodes,” IEEE International Conference on Micro Electro Mechanical Systems (MEMS), 2024
  • 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,” IEEE International Conference on Micro Electro Mechanical Systems (MEMS), 2024.
  • O. Barrera, S. Cho, K. Hyunh, J. Kramer, M. Liao, V. Chulukhadze, L. Matto, M. Goorsky, and R. Lu, “Transferred Thin Film Lithium Niobate as Millimeter Wave Acoustic Filter Platforms“, IEEE International Conference on Micro Electro Mechanical Systems (MEMS), 2024

October 2023

• Our paper “Thin-Film Lithium Niobate Acoustic Filter at 23.5 GHz with 2.38 dB IL and 18.2% FBW” is selected as JMEMS Right Now Paper, and featured on IEEE JMEMS cover page. Congratulatrrions!
• Our paper Millimeter Wave Thin-Film Bulk Acoustic Resonator in Sputtered Scandium Aluminum Nitride is accepted by IEEE JMEMS
• Prof. Lu will present an invited talk at the 2024 IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium.

September 2023

• Our paper “Thin-Film Lithium Niobate Acoustic Filter at 23.5 GHz with 2.38 dB IL and 18.2% FBW” is accepted by IEEE JMEMS

August 2023

• Our paper “Near Spurious-Free Thickness Shear Mode Lithium Niobate Resonator for Piezoelectric Power Conversion” is accepted by IEEE TUFFC

June 2023

• Jack received the UT ECE Summer Graduate Scholarship. Congratulations!

May 2023

• Five of our papers have been accepted to IEEE IUS 2023! Congratulations to Jack, Sinwoo, Vato, and Omar!
  • J. Kramer, K. Huynh, R. Tetro, L. Matto, O. Barrera, V. Chulukhadze, D. Luccioni, L. Colombo, M. Goorsky, R. Lu, “Trilayer Periodically Poled Piezoelectric Film Lithium Niobate Resonator,” IEEE International Ultrasonics Symposium (IUS), Sept. 2023
  • V. Chulukhadze, J. Kramer, N. Ahmed, O. Barrera, S. Cho, and R. Lu, “Frequency Tuning of Suspended Millimeter Wave Lithium Niobate Acoustic Resonators Using Ion Beam Assisted Argon Gas Cluster Trimming,” IEEE International Ultrasonics Symposium (IUS), Sept. 2023
  • 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,” IEEE International Ultrasonics Symposium (IUS), Sept. 2023
  • S. Cho, O. Barrera, P. Simeoni, J. Kramer1, V. Chulukhadze, W. Zhao, and R. Lu, “28.4 GHz Bulk Acoustic Resonator in Thin-Film Scandium Aluminum Nitride,” IEEE International Ultrasonic Symposium (IUS), 2023
  • V. Chulukhadze, E. Stolt, W. Braun, K. Nguyen, J. Fernandez, S. Chakraborty, J. Rivas, and R. Lu, “Spurious Mode Suppression with Excited Ring in Lithium Niobate Bulk Acoustic Resonators for Piezoelectric Power Conversion,” IEEE International Ultrasonic Symposium (IUS), 2023
• Jack receives the Best Student Paper Award at IEEE IFCS 2023! Congratulations!
• Vato receives Jim and Dorothy Doyle scholarship. Congrat!

April 2023

• Kristi receives Texas ECE Graduate Achievement Award! Great achievement!
• Jack won the third place in the Student Research Competition at the Texas Symposium on Wireless and Microwave Circuits and Systems!
• Jack is selected as the Best Student Paper Finalist for IEEE IFCS 2023. Congratulations!

March 2023

• Joshua, Tianyi, and Ian are joining us in Fall. Welcome!
• Four of our papers have been accepted to IEEE IFCS 2023! Congratulations to Jack, Sinwoo, Vato, and Kristi!
  • J. Kramer, V. Chulukhadze, K. Huynh,  O. Barrera, M. Liao, S. Cho, L. Matto, M. Goorsky, and R. Lu, “Thin-Film Lithium Niobate Acoustic Resonator with High Q of 237 and k² of 5.1% at 50.74 GHz,” IEEE International Frequency Control Symposium (IFCS), May 2023
  • V. Chulukhadze, K. Huynh,  J. Kramer, M. Liao, S. Cho, L. Matto, O.  Barrera, C. Cui, M. Goorsky, and R. Lu, “Frequency Scaling Millimeter Wave Acoustic Devices in Thin Film Lithium Niobate,” IEEE International Frequency Control Symposium (IFCS), May 2023
  • K. Nguyen,  E. Stolt, W. Braun, V. Chulukhadze, J. Fernandez, S. Chakraborty, J. Rivas, and R. Lu, “Spurious-Free Lithium Niobate Bulk Acoustic Resonator for Piezoelectric Power Conversion,” IEEE International Frequency Control Symposium (IFCS), May 2023
  • 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,” IEEE International Frequency Control Symposium (IFCS), May 2023

February 2023

• Our collaborated work with Dr. Lai’s group, “Nanoscale Imaging of Super-High-Frequency Microelectromechanical Resonators with Femtometer Sensitivity” has been accepted to Nature Communications!

January 2023

• Jack’s paper Extracting Acoustic Loss of High-Order Lamb Modes at Millimeter-Wave Using Acoustic Delay Lines has been accepted to IMS 2023. Congratulations!

December 2022

• Tzu-Hsuan is joining as a visiting student. Welcome!
• Omar won Cadence Diversity in Technology Scholarship! Congratulations!

November 2022

• Wen is joining us in 2023 Spring. Welcome!

October 2022

• Kristi receives the Best Student Paper Award for IEEE IUS 2022. Great achievement!!!

September 2022

• Our paper, “57 GHz Acoustic Resonator with k2 of 7.3% and Q of 56 and in Thin-Film Lithium Niobate”, is accepted for IEDM 2022. Congratulations!

July 2022

• Jack receives the Best Student Paper Award for IEEE ICMAM 2022. Great honor!!!
• Kristi is selected as the Best Student Paper Finalist for IEEE IUS 2022. Congratulations!

June 2022

• Jack’s two papers, “K-Band First-Order Antisymmetric Mode Acoustic Resonator in Thin-Film Lithium Niobate” and “Millimeter-Wave Acoustic Delay Lines in Periodically Poled Piezoelectric Film Lithium Niobate“, have been accepted to PiezoMEMS 2022. Congratulations!
• Our collaborated work with Dr. Lai’s group, “Spatiotemporal Imaging of Acoustic Resonators by Microwave Microscopy” has been accepted to PiezoMEMS 2022!
• Kristi’s paper,“Near-Spurious-Free Lithium Niobate Resonator for Piezoelectric Power Conversion with Q of 3500 and kt2 of 45%,” has been accepted to IEEE IUS 2022! Congratulations!

May 2022

• Our collaborated work with Prof. Siddhartha Ghosh from Northeastern Univerisity, “Experimental Observation of Electron-Phonon Interaction in Semiconductor on Solidly Mounted Thin-Film Lithium Niobate” has been accepted by IC-MAM’22. Congratulations!
• Jack’s paper “Acoustic Wave Focusing Lens at Radio Frequencies in Thin-Film Lithium Niobate” has been accepted by IC-MAM’22. Congratulations!

April 2022

• Sinwoo is selected as the 2022 Qualcomm Innovation Fellowship Finalist! Congrats!
• Sinwoo won the first place in the Student Research Competition at the Texas Symposium on Wireless and Microwave Circuits and Systems! Jack won the honorable mention award! Congratulations!

March 2022

• Vakhtang (Vato) Chulukhadze will join our group in 2022 Fall. Welcome!
• Yenwei Chang will join our group in 2022 Fall. Welcome!
• Our collaborated paper, Enabling IoT Self-Localization Using Ambient 5G Signals, has been accepted to NSDI Fall 2022.

Feb. 2022

• Dr. Lu receive IEEE MTT-S 2022 Microwave Award, for our paper entitled “Surface Acoustic Wave Devices using Lithium Niobate on Silicon Carbide,” in IEEE Transactions on Microwave Theory and Techniques!!! Microwave Prize Recognizes, on an annual basis, the most significant contribution by a published paper to the field of interest of the MTT-S. The Microwave Prize is the Society’s oldest Award.
• Our paper, Acoustic Delay Lines in Thin-Film Lithium Niobate on Silicon Carbide, has been accepted as an oral presentation to IEEE IMS 2022! Congrats!

December 2021

• Omar is joining the group in Spring 2022. Welcome!
• Kristi is selected as the junior student representative in IEEE Ultrasonics, Ferroelectrics, and Frequency Control Society (UFFC-S)! Congratulations!

November 2021

• We have openings for outstanding postdocs in RF microsystems! (read more, updated Nov. 2021)
• We have openings for graduate students! (updated Nov. 2021)
• Our collaborated paper, “Visualization of Acoustic Power Flow in Suspended Thin-film Lithium Niobate Phononic Devices” has been accepted to Applied Physics Letters!
• Our collaborated paper, “Fixed-Frequency Control of Piezoelectric Resonator DC-DC Converters for Spurious Mode Avoidance” has been accepted to IEEE Open Journal of Power Electronics!

September 2021

• Our paper, “Acoustic Loss of GHz Higher-Order Lamb Waves in Thin-Film Lithium Niobate: A Comparative Studyoustic Loss in Thin-Film Lithium Niobate: An Experimental Study” has been accepted to IEEE Journal of Microelectromechanical Systems!
• Professor Lu received the Texas ECE Early Career Fellow for 2021-2022!

July 2021

• Our invited review paper, “RF Acoustic Microsystems Based on Suspended Lithium Niobate Thin Films: Advances and Outlook” has been accepted to Journal of Micromechanics and Microengineering.

June 2021

• Our paper, “Acoustic Loss in Thin-Film Lithium Niobate: An Experimental Study“ has been accepted to IEEE Journal of Microelectromechanical Systems!
• Our paper, “Power Flow Angles of GHz Propagating Acoustic Waves in Thin-Film Lithium Niobate” will be presented at IEEE IUS 2021!

May 2021

• Our paper, “A 15.8 GHz A6 Mode Resonator with Q of 720 in Complementarily Oriented Piezoelectric Lithium Niobate Thin Films” will be presented at IEEE IFCS 2021 (Invited Presentation)!

April 2021

• Kristi and Jack are joining the group in Fall 2021. Welcome on board!
• Our paper, “GHz Low-Loss and High Power Handling Acoustic Delay Lines Using Thin-Film Lithium Niobate on Sapphire” has been accepted to IEEE Transactions on Microwave Theory and Techniques!

March 2021

• Sinwoo is joining the group in Fall 2021. Welcome!
• Our collaborated paper, “Optimized Resonators for Piezoelectric Power Conversion” has been accepted to IEEE Open Journal of Power Electronics!
• Our invited review paper, “Microwave Acoustic Devices: Recent Advances and Outlooks” has been accepted to IEEE Journal of Microwaves!

Feb. 2021

• Our paper, “Low-Loss and High Power Handling Acoustic Delay Lines Using Thin-Film Lithium Niobate on Sapphire” has been accepted as an oral presentation in IEEE International Microwave Symposium (IMS)!
• Professor Lu is nominated as the Education Committee Chair in IEEE Ultrasonics, Ferroelectrics, and Frequency Control Society (UFFC-S).

Jan. 2021

• Professor Lu is nominated as an IEEE Electron Devices Society (EDS) Technical Committee Member of Microelectromechanical Systems.

Dec. 2020

• Our collaborated work “Efficient Wideband Spectrum Sensing Using MEMS Acoustic Resonators” has been accepted to NSDI ’21 Fall, a top venue in networking!
• Our work “Enabling Higher Order Lamb Wave Acoustic Devices With Complementarily Oriented Piezoelectric Thin Films” has been highlighted as IEEE JMEMS RightNow Papers because of its “excellent quality”, and grant open access to a large community of readers.