High-frequency GaAs optomechanical bullseye resonator

The integration of optomechanics and optoelectronics in a single device opens new possibilities for developing information technologies exploring fundamental phenomena. Gallium arsenide (GaAs) is well-known material that can bridge the gap between functionalities optomechanical devices optical gain media. Here, we experimentally demonstrate high-frequency GaAs resonator with ring-type bullseye geometry unprecedented this platform. We measured mechanical modes up to 3.4 GHz quality factors 4000 (at 80 K) coupling rates 39 kHz at telecom wavelengths. Moreover, investigated symmetry break due elastic anisotropy its impact on mode spectrum. Finally, assessed temperature dependence losses demonstrated efficiency resilience anchor loss suppression, indicating lower operation may allow over 104. Such characteristics are valuable active optomechanics, coherent microwave optics conversion via piezomechanics, other implementations oscillators III–V materials.