Nonreciprocal transmission characteristics in double-cavity double-optomechanical system

<sec>Optical non-reciprocal devices such as the isolators are quite important components in optical systems. To realize transmission of light, Lorenz reciprocity theorem must be broken first and main method is that Faraday magnetic rotation effect used to change polarization state signal through magneto-optical materials. However, this difficult achieve on-chip integration. So using optomechanical system presented overcome difficulty.</sec><sec>In order improve isolation characteristics device, a double-cavity double-optomechanical system, which coupled two modes by mechanical oscillators with different coupling strengths, proposed. Driven red detuning field phenomenon can realized regulating phase difference, direction light determined well. This property quantum interference between strengths couplings cavity modes. The relative operators represented their average value plus fluctuations, then according input-output relationship amplitude rate obtained.</sec><sec>We mainly discuss distribution function strength. results combined action make have higher fault tolerance rate. other mode large at specific frequencies reverse resonant frequency signals same time.</sec>