Quantification of antagonistic optomechanical forces in an interferometric detection system for dynamic force microscopy
Quantification of antagonistic optomechanical forces in an interferometric detection system for dynamic force microscopy
复制标题
动态力显微镜干涉检测系统中对抗光机械力的量化
DOI：
10.1063/1.3509412
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
M. Reichling
中科院分区：
文献类型：
--
作者：
L. Tröger;M. Reichling
在检测振荡悬臂运动的光纤干涉仪系统中，干涉腔中的光场的强度分布产生确定振荡系统的有效特性的光机械耦合。对于由未涂覆的悬臂梁和光纤端建立的低精细度腔，谐振频率和弹簧常数主要由于辐射压力而移位，而Q因子在典型条件下由于光热力而变化。我们发现，辐射压力和光热力的作用方向相反，并讨论了延迟时间的拮抗作用不同的数量级。
In fiber-optic interferometer systems detecting oscillatory cantilever motion, the intensity distribution of the light field in the interferometric cavity generates an optomechanical coupling determining the effective properties of the oscillating system. For a low finesse cavity established by an uncoated cantilever and the fiber end, the resonance frequency and spring constant are shifted mainly due to radiation pressure whereas the Q-factor is varied due to photothermal forces under typical conditions. We find, that radiation pressure and photothermal force act in opposite directions and discuss the retardation times governing the antagonistic effects differing by orders of magnitude.