Linbo Shao is an Assistant Professor in the Bradley Department of Electrical and Computer Engineering and affiliated with Department of Physics at Virginia Tech and a faculty member of Virginia Tech Center for Quantum Information Science and Engineering (VTQ). He received his Ph.D. in Engineering Science in 2019 and M.S. in Applied Physics in 2016 from Harvard University, and B.S. in microelectronics in 2014 from Peking University. His current research focus on lithium niobate integrated acoustic-wave and acousto-optic devices for sensing, computing, and quantum applications.
Presentation Title:
Lithium Niobate Integrated Phononics
Presentation Abstract:
Acoustic waves in solids offer advantages over their electromagnetic counterparts, including wavelengths that are five orders of magnitude shorter, an absence of free-space radiation, and higher quality (Q) factors. Integrated phononics, which leverages on-chip, microwave-frequency acoustic waves, is emerging as a promising quantum platform, as well as its integration with superconducting qubits and photonics. In this talk, I will present our progress in lithium niobate phononic integrated circuits. Leveraging the nonlinear piezoelectric effects of lithium niobate, we achieved phase and amplitude modulation of waveguided phonons using electrical fields. Further, I will discuss our recent work on electrically modulated high-Q phononic crystal resonators, where we emulate atomic-like transitions between distinct phononic modes. In addition, by introducing gain into the system, we construct low-noise phonon lasers and observe exceptional points in coupled resonators. Finally, I will vision phononic integrated circuits into a versatile platform for quantum sensing and quantum computing architectures.