色散光力耦合系统中微悬臂梁囚禁与冷却的实验研究

项目名称： 色散光力耦合系统中微悬臂梁囚禁与冷却的实验研究

项目编号： No.11204357

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理学I

项目作者： 付号

作者单位： 中国科学院武汉物理与数学研究所

项目金额： 30万元

中文摘要： 本项目旨在研究利用色散光力耦合实现微纳共振器的囚禁并进而实现高效光力冷却的实验方法。对于利用基于共振器的两镜面光腔构成的光力耦合系统而言，一方面光腔光学性能与共振器力学性能之间的矛盾限制了光力耦合效率的提高，另一方面光力诱导的双稳效应也限制了光力冷却的冷却极限。研究表明基于共振器的色散光力耦合系统在成功解决了光力系统光学性能与力学性能之间矛盾的同时还提供了更加丰富的光力耦合机制。本项目通过将一个高灵敏单晶硅悬臂梁插入到传统的Fabry-Perot光腔中间构筑一个色散光力耦合系统，重点研究利用色散光力耦合实现悬臂梁囚禁的方法，解决双稳效应对光力冷却极限的限制问题。并进一步开展同时实现悬臂梁囚禁与冷却的研究，探索利用光力囚禁悬臂梁实现高效冷却。同时，我们还将与国内理论小组开展合作，深入研究色散光力耦合系统中不同光力耦合机制对悬臂梁动力学性能的影响，分析得到色散光力系统中的优化冷却条件。

中文关键词： 色散光力系统；光学囚禁；光学冷却；微悬臂梁；

英文摘要： This project dedicates to study the method of trapping micro-resonator via dispersive optomechanical coupling mechanism and realizing the high efficient optomechanical cooling. In the traditional micro-resonator-based two-mirror-cavity optomechanical system, there exist two drawbacks-the technical challenge of simultanously increasing the optical properties of micro-cavity and mechanical performance of micro-resonator; and limitation imposed on the optomechanical cooling limit by the optomechanical induced bistability effect. Studies have showed that the resonator-based dispersive optomechanical system can successfully resolve the conflict between optics and mechanics of optomechanical system and offer more optomechanical coupling mechanisms. In this project, a dispersive optomechanical system is constructed by inserting a micro-cantilever into a traditional Fabry-Perot optical cavity. Our researches focus on employing the dispersive coupling mechanism to achieve micro-cantilever trapping, which will benefit surmounting the bistability effect imposed limit of cooling operation. And we will further study of simultaneously trapping and cooling of the micro-cantilever and achieving a high efficient cooling with the optomechanical trapped micro-cantilever. Besides, we will cooperate with theoretical groups to invest

英文关键词： dispersive optomechanical system；optical trapping；optical cooling；mirco-cantilever；