混合腔光力系统的双光子散射  

Two-Photon Scattering in Mixed Cavity Optomechanical System

作　　者：陈冬成 周岳辉 黄金凤 廖洁桥 Chen Dongcheng;Zhou Yuehui;Huang Jinfeng;Liao Jieqiao(Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education,Key Laboratory for Matter Microstructure and Function of Hunan Province,Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications,Hunan Normal University,Changsha,Hunan 410081,China)

机构地区：[1]低维量子结构与调控教育部重点实验室,物质微结构与功能湖南省重点实验室,物理系和量子效应及其应用协同创新中心,湖南师范大学,湖南长沙410081

出　　处：《光学学报》2022年第3期215-224,共10页Acta Optica Sinica

基　　金：国家自然科学基金(12075083,12175061,11774087,11822501,11935006);湖南省教育厅重点项目(18A007);湖南省自然科学基金项目(2020JJ5345);湖南省科技计划项目(2017XK2018);湖南省科技创新计划(2020RC4047,2021RC4029)。

摘　　要：混合腔光力系统同时包含一次和二次光力相互作用。本文研究了混合腔光力系统中的双光子散射问题。在Wigner-Weisskopf框架下,通过求解散射过程,获得了混合腔光力系统散射态的解析表达式,揭示了双光子散射的4个物理过程:1)双光子均被直接反射,不进入腔中;2)一个光子被直接反射,另一个光子入射进腔中;3)两个光子按次序先后入射进腔中,但腔中最多只有一个光子;4)两个光子均入射进腔中。通过分析双光子散射谱,发现在该散射过程中可以产生双光子频率反关联,并且发现了混合腔光力系统中的参数与双光子散射谱特性之间的联系。该研究不仅提供了一种产生关联光子对的散射方法,而且提出了一种表征光力系统参数的光谱方法。A mixed cavity optomechanical system consists of both the first-order and quadratic optomechanical interactions. We study the two-photon scattering problem in the mixed cavity optomechanical system. By solving the scattering process within the Wigner-Weisskopf framework, we obtain the analytical expression of the scattering state and find four physical processes associated with the two-photon scattering process in this system: 1) two photons are directly reflected by the fixed end mirror, without entering the cavity;2) one photon is reflected directly and the other photon enters the cavity;3) two photons enter the cavity in sequence, but there is at most one photon in the cavity;4) two photons enter the cavity. By analyzing the two-photon scattering spectrum, we find that the two-photon frequency anticorrelation can be induced via this scattering process. We also find the relationship between the parameters of the mixed cavity optomechanical system and the characteristics of the two-photon scattering spectrum. This study not only provides a scattering method to create correlated-photon pairs, but also presents a spectrometric way to characterize the optomechanical system.

关 键 词：量子光学 腔光力学 混合腔光力系统 光子散射 关联光子对 

分 类 号：O431.2[机械工程—光学工程]