-
High-quality-factor (Q-factor) mechanical resonators are indispensable components in quantum optomechanical experiments such as optomechanical cooling, quantum sensing, precision metrology and entanglement/squeezing generation. While the Q-factor measurement has been performed for high-frequency resonators with low Q-factor, the Q-factor measurement for a low-frequency resonator with high Q-factor is still challenging. It is difficult to identify the mechanical modes from the other noise source in the environment, such as audio noises of air fans and mechanical modes of clamps. Furthermore, the traditional piezoceramic transducer for driving the mechanical resonator has limited response speed. In this article, we employs the optical radiation pressure to directly drive the mechanical oscillator. The Q-factor is measured by the ring-down technique. With the help of precise controllable electrical current, the radiation pressure can be precisely controlled, thus providing faster response and broader operational bandwidth, especially in the acoustic and sub-acoustic frequency ranges. What’s more, this approach mitigates the low-frequency noise induced by environmental vibrations and experimental apparatus, which are difficult to isolate. In the experiment, we measure the Q-factors of a mechanical resonator array which includes tens of single mechanical resonators of different size and different structure. A single resonator consists of a single-crystal GaAs cantilever integrated with a micromirror. A laser beam, modulated by an acousto-optic modulator (AOM) acting as a fast optical switch, serves as the radiation pressure driving source. Another probe beam is reflected by the high-reflectivity micromirror of the resonator and detected by a quadrant photodetector (QPD) to obtain the ring-down signal from which the Q-factor is obtained. The results are compared with those obtained using traditional piezoceramic drive. The results show that in the low-frequency region (below ~2 kHz), where environmental noise coupling is pronounced, the optical drive method effectively suppresses low-frequency noises. The relative error of Q-factor measurements using optical drive is approximately 5%, lower than that obtained with piezoelectric drive. This optical radiation-pressure drive technique provides a robust and fast-response approach for measuring the Q-factors of massive low-frequency mechanical resonators.
-
Keywords:
- Optical Radiation Pressure /
- Low-Frequency Band /
- Q-Factor /
- Ring-Down Measurement
-
[1] Yu H,McCuller L,Tse M, Kijbunchoo N, Barsotti L, Mavalvala N 2020 Nature 583 43-47
[2] Michimura Y, Komori K 2020 The European Physical Journal D 74 126
[3] Barzanjeh S,Xuereb A,Gröblacher S,Paternostro M,Regal C A, Weig E M 2022 Nature Physics 18 15-24
[4] 陈华俊，米贤武 2012 Chinese Journal of Quantum Electronics 29 153-164
[5] Cupertino A, Shin D, Guo L, Steeneken P G, Bessa M A, Norte R A 2024 Nature Communications 15 4255
[6] Huang G, Beccari A, Engelsen N J, Kippenberg T J 2024 Nature 626 512-516
[7] Dania L,Bykov D S,Goschin F,Teller M, Kassid A, Northup T E 2024 Physical Review Letters 132 133602
[8] 陈雪，刘晓威，张可烨，袁春华，张卫平 2015 64 164211
[9] Aspelmeyer M, Kippenberg T J, Marquardt F 2014 Rev. Mod. Phys 86 1391
[10] Engelsen N J, Beccari A, Kippenberg T J 2024 Nature Nanotechnology 19 725-737
[11] Tsuchida M, Morita T 2024 Precision Engineering 91 390-395
[12] Wang D,Pan Y,Wu S, Zhao H,Qu T,Tang J Proceedings of the 2016 Joint International Information Technology, Mechanical and Electronic Engineering Xi'an,2016,17-23
[13] Ciers A,Jung A,Ciers J,Nindito L R, Pfeifer H, Dadgar A, Wieczorek W 2024 Advanced Materials 36 2403155
[14] Dalziel J W 2012 Cavity Optomechanics with High-Stress Silicon Nitride Films Ph.D. Dissertation（Pasadena:California Institute of Technology）
[15] 何德方，徐荣泽，杨浩 2020光电技术应用 35 60-65
[16] Lokasani R,Arai G,Kondo Y,Hara H, Dinh T H,Ejima T,Limpouch J 2016 Applied Physics Letters 109 19
[17] 崔鼎，马社，李才阳，叶长春 2014强激光与粒子束 26 12-15
[18] 武列列，任益充，薛飞 2025 74 030701
[19] Corbitt T,Wipf C,Bodiya T,Ottaway D,Sigg D,Smith N,Mavalvala N 2007 Physical Review Letters 99 160801
[20] Trowbridge A C,Wright E M,Dholakia K 2025 arXiv:2504.18789 [physics.optics]
[21] Cole G D 2012 Proceedings of the Society of Photo - Optical Instrumentation Engineers San Diego, 2012,28-38
[22] Sharifi S,Banadaki Y M,Cullen T,Veronis G,Dowling J P,Corbitt T 2020 Review of Scientific Instruments 91 054504
Metrics
- Abstract views: 28
- PDF Downloads: 0
- Cited By: 0
下载:
