双机械振子光机械系统的电磁诱导透明

Electromagnetically Induced Transparency in Two Mechanical Oscillators Coupled Cavity Optomechanical System

考虑1个腔场中包含2个可移动镜子的腔光机械系统,可移动的镜子可以看成机械振子,该系统同时被2束经典激光场驱动,则在腔场与2个机械振子之间、腔场与经典激光场之间都会产生相互作用。利用平均场近似条件,写出系统算符平均值的时间演化方程,从而得到系统的稳态解;为了直观形象,数值模拟了系统输出的探测场随失谐的变化关系。模拟结果表明:当2个机械振子振动频率不同时,此系统出现双电磁诱导透明现象;同时发现,在所选取的参数范围内,腔场之间的有效耦合能够控制透明窗口的宽度,有效耦合系数越大,透明窗口越宽。

We considered a cavity optomechanical system consisted of two movable mirrors,which was driven by two classical laser fields,and the movable mirrors could be regard as mechanical oscillators. So,the interaction was inevitable between cavity and moving mirrors,cavity and classical fields. The time evolutions equations of the expectation values of the system operators could be written by the mean field approximation,and obtained the steady-state solution of the equations. In order to simulate a visual image,we numerically evaluate the output probe cavity field as a function of the normalized probe detuning. We demonstrate the existence of the analog of double optomechanically induced transparency in the output field when the frequencies of two oscillator modes are different.Our results also prove that the width of transparency windows increase with the increasing of effective coupling coefficient in selected parameter range,the larger effective coupling coefficient the wider ofthe window of transparency.