项目名称: 基于回音壁模式微腔与微纳机械振子的相互作用
项目编号: No.61308079
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 无线电电子学、电信技术
项目作者: 董春华
作者单位: 中国科学技术大学
项目金额: 24万元
中文摘要: 微纳机械振子可以通过回音壁模式进行激发获得窄线宽的机械模式,从而可以用来研究与光场的相互耦合作用。本项目主要以制备获得超窄线宽的微纳机械振子,并用该机械振子实现长时间的光信息的存储与读取,为微纳机械振子用于建立量子网络而努力。作为回音壁模式的微腔本身支持光机械模式,但该机械模式与回音壁的耦合强度不高,且线宽约为20kHz左右,能够实现几微秒的光信息存储和读取,但对建立远程的量子网络还是远远不够。对此,本项目将制备微纳机械振子,通过优化加工工艺,得到超窄线宽的机械模式,并研究回音壁模式与微纳机械振子的相互耦合作用强度。项目的实施有望获得高品质的微纳机械振子,实现光信息的长时间存储和读取。
中文关键词: 回音壁模式;介质微腔;微纳机械振子;信息存储;非互易
英文摘要: Cavity-enhanced radiation-pressure coupling between optical and mechanical degrees of freedom allows quantum-limited position measurements and gives rise to dynamical backaction, enabling amplification and cooling of mechanical motion. This project mainly focuses on the fabrication of nanomechanical oscillator to get mechanical mode with ultranarrow linewidth. Then we use this hybrid system with the microsphere and nanomechanical oscillator to study the light storage with long time, which can be used for the quantum information and quantum internet. The microsphere support the mechanical mode with the linewidth of 20kHz, corresponding to the lifetime around several ms of the light storage. It is not enough for quantum information with the long distance. Therefore, it is critical for the long lifetime of the light storage. This project will investigate the fabrication of the nanomechanical oscillator to get the ultra-narrow linewidth. And we also study the radiation-pressure coupling between the wishpering gallery mode in the microsphere and the nanomecanical oscillator. Therefore, this project will achieve the nanomechanical oscillator with sharp linewidth for the long time light storage.
英文关键词: Whispering gallery mode;silica microsphere;Mechanical oscillator;light storage;non-reciprocity