AI 中文总结
该研究构建含悬挂氮化硅膜谐振镜的平面腔，通过分析与模拟探究色散光力学，实验发现光学弹簧幅度远超模型预测，推测源于光热效应并提出现象学模型。
AI 中文摘要
我们研究由宽带反射镜与具备高Q值内部光学谐振的超薄悬挂谐振镜构成的平面-平面结构腔中的光力学效应。首先基于通用分析模型及实际结构的有限元法模拟，探究这类腔中的色散光力学效应；随后报道采用亚波长光栅图案化的悬挂氮化硅膜开展的光学弹簧测量实验。观测到的光学弹簧变化与色散腔光力学模型的预期定性匹配，但其幅度比预测值大两个数量级以上。我们推测该强光力学相互作用源于光热效应，并提出一个现象学模型，该模型可合理支撑观测结果。
英文摘要
We investigate optomechanical effects in cavities consisting of a plane-plane arrangement of a broadband reflectivity mirror and an ultrathin, suspended resonant mirror possessing a high-Q internal optical resonance. We first investigate dispersive optomechanics in such cavities on the basis of a generic analytical model as well as finite element method simulations of realistic structures. We then report on experimental optical spring measurements using a suspended silicon nitride membrane patterned with a subwavelength grating. While the observed optical spring variations qualitatively match those expected from the dispersive cavity optomechanics model, their magnitude is more than two orders of magnitude larger than predicted. We surmize that this strong optomechanical interaction is due to photothermal effects and put forward a phenomenological model that plausibly supports the observations.
Comments18 pages, 10 figures
