腔光力系统中机械振子的参量压缩

量子电子学报 ›› 2020, Vol. 37 ›› Issue (1): 29-33.

腔光力系统中机械振子的参量压缩

谌成渝1,2，毛添华1，龚志成1,2，袁泉1,2，付号1,3,*，曹更玉1

1中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室，湖北武汉 430071； 2中国科学院大学，北京 100049 3 中国工程物理研究院研究生院，北京 100193

收稿日期:2019-04-28 修回日期:2019-11-26 出版日期:2020-01-28 发布日期:2020-01-28
通讯作者: 付号 E-mail:h.fu@wipm.ac.cn
作者简介:谌成渝（1994-），湖南益阳人，研究生，主要从事腔光力系统中机械振子振动压缩方面的研究。E-mail：1158868442@qq.com
基金资助:
Supported by National Natural Science Foundation of China (国家自然科学基金, 91636220), National Key Research and Development Program of China (国家重点研发计划,2017YFA0304500)

Parametric squeezing of mechanical resonator in an optomechanical system

SHEN Chengyu1,2, MAO Tianhua1,GONG Zhicheng1，2, YUAN Quan1,2, FU Hao1,3,*, CAO Gengyu1

1 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China; 2 University of Chinese Academy of Sciences, Beijing 100049, China 3 Graduate School of the China Academy of Engineering Physics, Beijing 100193, China

Received:2019-04-28 Revised:2019-11-26 Published:2020-01-28 Online:2020-01-28

摘要/Abstract

摘要： 微纳机械振子在精密测量领域有着广泛的应用，其中调幅或者调频技术是机械振子力学探测中常用的两种方法。一般情况下机械振子测量灵敏度主要受到热噪声的限制。因此，采用压缩的方法来降低特定相应测量分量上的热噪声可以有效提高微纳机械振子的力学测量灵敏度。在腔光力系统中通过锁相环路锁定机械振子的振动频率，并利用光学囚禁对机械振子的振动频率进行调制，在调制频率为机械振子共振频率的两倍时成功对机械振子的特定振动分量进行了压缩。并且通过反馈增强系统稳定的方法，成功的超越了参量压缩的3dB极限，达到了4.4dB的最大压缩率。

关键词: 量子光学, 参量压缩, 腔光力系统, 微纳机械振子, 反馈控制

Abstract: Micromechanical resonator is widely used in accurate measurements, in which frequency modulation and amplitude modulation are two usually used techniques. Generally, the force sensitivity of mechanical resonator is mainly limited by the thermal noise. Therefore, the thermal noise of measurement quadrature can be reduced through squeezing the mechanical resonator to effectively increase the sensitivity of the mechanical resonator. By using a phase lock loop to lock the resonator’s frequency, a specified motion quadrature of mechanical resonator is squeezed through modulating the frequency of the mechanical resonator at twice of its resonant frequency, which is implemented in an optical trap. In order to overcome 3dB limit of the parametric squeezing, a feedback loop is employed to stabilize measurement system. And a squeezing rate of 4.4dB is achieved when the feedback loop is activated.

Key words: quantum optics, parametric squeezing, cavity optomechanical system, micro-nano resonator, feedback control

中图分类号:

0431.2

谌成渝毛添华龚志成袁泉付号曹更玉. 腔光力系统中机械振子的参量压缩[J]. 量子电子学报, 2020, 37(1): 29-33.

SHEN Chengyu, MAO Tianhua, GONG Zhicheng, YUAN Quan, FU Hao, CAO Gengyu. Parametric squeezing of mechanical resonator in an optomechanical system[J]. Chinese Journal of Quantum Electronics, 2020, 37(1): 29-33.

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