Optomechanical transistor with mechanical gain
Optomechanical transistor with mechanical gain
复制标题
具有机械增益的光机械晶体管
DOI:
10.1103/physreva.97.043818
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发表时间:
2018-01
影响因子:
2.9
通讯作者:
Li Yong
中科院分区:
文献类型:
--
作者:
Zhang X Z;Tian Lin;Li Yong
We study an optomechanical transistor, where an input field can be transferred and amplified unidirectionally in a cyclic three-mode optomechanical system. In this system, the mechanical resonator is coupled simultaneously to two cavity modes. We show that it only requires a finite mechanical gain to achieve the nonreciprocal amplification. Here the nonreciprocity is caused by the phase difference between the linearized optomechanical couplings that breaks the time-reversal symmetry of this system. The amplification arises from the mechanical gain, which provides an effective phonon bath that pumps the mechanical mode coherently. This effect is analogous to the stimulated emission of atoms, where the probe field can be amplified when its frequency is in resonance with that of the anti-Stokes transition. We show that by choosing optimal parameters, this optomechanical transistor can reach perfect unidirectionality accompanied with strong amplification. In addition, the presence of the mechanical gain can result in ultralong delay in the phase of the probe field, which provides an alternative to controlling light transport in optomechanical systems.
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DOI:
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