基于多模式光机械系统的相干完美吸收与透射

Coherent Perfect Absorption and Transmission Based on a Multi-Mode Optomechanical System

摘要: 本文提出一种广义的多模式腔光机械系统，其中两光学腔由一束较强的控制场和一束较弱的信号场驱动与同一个机械振子耦合。较弱的信号场将会被该系统完全吸收而不产生任何能量输出，定义该现象为相干完美吸收，并且当相干完美吸收产生时输入信号场的能量将由两个腔场和机械模所分担。改变参数条件，较弱的输入信号场将由一个腔传递到另一个腔而不产生任何的能量损耗，定义该现象为相干完美透射。上述两种现象可由两腔场之间的耦合所操控，并进一步分析了该现象产生的起源和条件。上述两种现象将在全光学领域中的量子信息方面有着潜在的应用。

Abstract: We present a generalized multi-mode cavity optomechanical system, where two cavity modes with strong control fields and weak signal fields are coupled to a common mechanical resonator. The weak input signal fields will be entirely absorbed by the system without generating any energy output from each of the cavity modes termed coherent perfect absorption (CPA), and the two cavity modes and mechanical mode will share the input probe fields energy when CPA occurs under parameter regimes. With changing the parameter conditions, a weak input signal field will transmit from one cavity to the other cavity without undergoing any energy loss termed coherent perfect transmission (CPT). The above phenomena are dependent on the coupling strength between the two cavity modes in this optomechanical system. The origin and conditions that enable these phenomena to achieve are analyzed, and potential applications in quantum information may be realized in all-optical domain based on such phenomena.