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Tunable optomechanically induced transparency and fast-slow light in a loop-coupled optomechanical system

Chinese Physics B 2021年第9期30卷 235-241页

作者： Qinghong Liao Xiaoqian Wan Gaoqian He Liangtao Zhou Department of Electronic Information Engineering Nanchang UniversityNanchang 330031China Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of Education Anhui UniversityHefei 230601China

We theoretically explore the tunability of optomechanically induced transparency(OMIT)phenomenon and fast-slow light effect in a loop-coupled hybrid optomechanical system in which two optical modes are coupled to a common mechanical *** the probe output spectrum,we find that the interference phenomena OMIT caused by the optomechanical interactions and the normal mode splitting(NMS)induced by the strong tunnel coupling between the cavities can be *** further observe that the tunnel interaction will affect the distance and the heights of the sideband absorption *** results also show that the switch from absorption to amplification can be realized by tuning the driving strength because of the existence of stability *** from modulating the tunnel interaction,the conversion between slow light and fast light also can be achieved by adjusting the optomechanical interaction in the output *** study may provide a potential application in the fields of high precision measurement and quantum information processing.

关键词： hybrid optomechanical system optomechanically induced transparency and absorption normal mode splitting fast light and slow light

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Enhancing optomechanical force sensing via precooling and quantum noise cancellation

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Science China(Physics,Mechanics & Astronomy) 2020年第1期63卷 44-54页

作者： Tesfay Gebremariam Ye-Xiong Zeng Mojtaba Mazaheri Chong Li Department of Physics Ar ba Minch UniversityAr ba Minch 21Ethiopia School of Physics Dalian University of TechnologyDalian 116024China Department of Basic Science Hamedan University of TechnologyHamedan 65169-1-3733Iran

We theoretically investigate optomechanical force sensing via precooling and quantum noise cancellation in two coupled cavity optomechanical systems. We show that force sensing based on the reduction of noise can be used to dramatically enhance the force sensing and that the precooling process can effectively improve the quantum noise cancellation. Specifically, we examine the effect of optomechanical cooling and noise reduction on the spectral density of the noise of the force measurement; these processes can significantly enhance the performance of optomechanical force sensing, and setting up the system in the resolved sideband regime can lead to an optimization of the cooling processes in a hybrid system. Such a scheme serves as a promising platform for quantum back-action-evading measurements of the motion and a framework for an optomechanical force sensor.

关键词： hybrid optomechanical system coherent quantum noise cancellation force sensing

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