光学杠杆检测中的回避动作

IF 8.4 1区 物理与天体物理 Q1 OPTICS
Optica Pub Date : 2024-01-03 DOI:10.1364/optica.500036
Shan Hao and Thomas P. Purdy
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引用次数: 0

摘要

从消费产品和工业传感器到科学研究中使用的精密测力显微镜,光学杠杆是一种具有百年历史并被广泛使用的检测技术。然而,尽管历史悠久,其量子极限仍有待探索。一般来说,任何精密光学测量都会对被测物体产生光力干扰(称为反作用),从而导致标准量子极限 (SQL)。在这里,我们用简单的射线光学描述了如何在光学杠杆检测中避免这种反作用。我们通过开发一种透镜系统,消除了氮化硅膜机械谐振器反射光因激光指向噪声引起的光学力矩而产生的额外倾斜,从而进行了一次原理验证实验,证明了经典机制中的反作用回避机制。我们实现了比 SQL 低两个数量级的读出噪声本底,相当于 100 的有效光机械合作度,而无需光腔。由于与量子传感相关的最先进的超低耗散光机械系统正在迅速接近量子噪声占主导地位的水平,简单而广泛适用的反作用规避协议对于超越量子极限至关重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Back action evasion in optical lever detection
The optical lever is a centuries old and widely used detection technique employed in applications ranging from consumer products and industrial sensors to precision force microscopes used in scientific research. However, despite the long history, its quantum limits have yet to be explored. In general, any precision optical measurement is accompanied by optical force induced disturbance to the measured object (termed as back action) leading to a standard quantum limit (SQL). Here, we give a simple ray optics description of how such back action can be evaded in optical lever detection. We perform a proof-of-principle experiment demonstrating the mechanism of back action evasion in the classical regime, by developing a lens system that cancels extra tilting of the reflected light off a silicon nitride membrane mechanical resonator caused by laser-pointing-noise-induced optical torques. We achieve a readout noise floor two orders of magnitude lower than the SQL, corresponding to an effective optomechanical cooperativity of 100 without the need for an optical cavity. As the state-of-the-art ultralow dissipation optomechanical systems relevant for quantum sensing are rapidly approaching the level where quantum noise dominates, simple and widely applicable back action evading protocols will be crucial for pushing beyond quantum limits.
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来源期刊
Optica
Optica OPTICS-
CiteScore
19.70
自引率
2.90%
发文量
191
审稿时长
2 months
期刊介绍: Optica is an open access, online-only journal published monthly by Optica Publishing Group. It is dedicated to the rapid dissemination of high-impact peer-reviewed research in the field of optics and photonics. The journal provides a forum for theoretical or experimental, fundamental or applied research to be swiftly accessed by the international community. Optica is abstracted and indexed in Chemical Abstracts Service, Current Contents/Physical, Chemical & Earth Sciences, and Science Citation Index Expanded.
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