High frequency lithium niobate film-thickness-mode optomechanical resonator
Abstract
High-frequency optomechanical resonators are in demand as transduction devices to bridge microwave and optical fields. Thin-film lithium niobate is a promising platform for implementing high-frequency optomechanics for its low optical loss and strong piezoelectric coefficients. However, its strong piezoelectricity is also known to introduce excess phonon loss. Here, we present lithium niobate optomechanical resonators with film-thickness-mode mechanical resonances up to 5.2 GHz, reaching the operating frequency regime of superconducting qubits. By engineering the mechanical anchor to minimize the phonon loss, we achieve a high quality factor up to 12 500 at cryogenic temperatures and, hence, a frequency-quality factor product of 6.6 × 1013. Our system also features interference between piezo-optomechanical and electro-optic modulation. A theoretical model is derived to analyze these two effects and their interference.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 28, 2020
- Source ID
- 10.1063/5.0020019
Entities
People
- Chang-Ling Zou
- Hong X Tang
- Jiacheng Xie
- Mohan Shen
- Wei Fu
- Yuntao Xu
Organizations
- Army Research Office
- David and Lucile Packard Foundation
- National Science Foundation
- United States Department of Energy
- University of Science and Technology of China
- Yale University