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

中文翻译：

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高频GaAs光机械靶心谐振器

将光机械和光电子技术集成在单个设备中为开发信息技术和探索基本现象提供了新的可能性。砷化镓（GaAs）是一种众所周知的材料，可以弥合光机械设备的功能和光学增益介质之间的差距。在这里，我们通过实验演示了具有环形牛眼几何形状的高频GaAs光机电谐振器，这在该平台上是前所未有的。我们测量了高达3.4 GHz的机械模式，质量因子为4000（在80 K下），在电信波长下的光机械耦合速率高达39 kHz。此外，我们研究了由于弹性各向异性而引起的材料对称性断裂及其对机械模式谱的影响。最后，⁴。这样的特性对于有源光机，通过压机的微波到光学的相干转换以及在III–V类材料中的高频振荡器的其他实现非常有价值。