Wei He

Publications (4)3.4 Total impact

• Source

  Available from: ArXiv

  Article: A Quantum Optomechanical Transistor Based on a Cavity-Optomechanical System

  Jin-Jin Li, Wei He, Ka-Di Zhu
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  ABSTRACT: We theoretically propose a scheme to realize an all-optically controlled quantum optomechanical transistor based on a cavity-optomechanical system, where the cavity photons interfere with the input signal photons while the pump field controls the transmission spectrum of the signal laser. Theoretical analysis shows such a quantum optomechanical transistor can be switched on or off by turning on or off the pump laser, which corresponds to amplification or attenuation of the signal laser, respectively. The results further demonstrate that the output signal gain is enhanced abruptly with increasing the input pump power. The scheme proposed here will pave the way towards many important applications such as all-optical logic circuits and quantum repeaters.
  05/2011;
• Source

  Available from: Jin-Jin Li

  Article: All-Optical Control of Light Group Velocity with a Cavity Optomechanical System

  Wei He, Jin-Jin Li, Ka-Di Zhu
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  ABSTRACT: We theoretically demonstrate complete all-optical control of light group velocity via a cavity optomechanical system composed of an optical cavity and a mechanical resonator. The realization depends on no specific materials inside the cavity, and the control of light group velocity stems from the interaction between the signal light and the moving optical diffraction grating within the cavity in analogy to the stimulated Brillouin scattering(SBS). Furthermore, we show that a tunable switch from slow light to fast light can be achieved only by simply adjusting the pump-cavity detuning. The scheme proposed here will open a novel way to control light velocity by all-optical methods in optomechanical systems.
  11/2010;
• Source

  Available from: Jin-Jin Li

  Article: Coupling-rate determination based on radiation-pressure-induced normal mode splitting in cavity optomechanical systems.

  Wei He, Jin-Jin Li, Ka-Di Zhu
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  ABSTRACT: We theoretically propose a precise way to measure the coupling rate in an optomechanical system based on radiation-pressure-induced normal mode splitting. This all-optical method is effective in both weak and strong coupling regions. Simultaneously the vibrational frequency of the mechanical mode can also be detected easily in the reflected probe spectrum. The results are much useful for the extensive applications in optomechanical systems.
  Optics Letters 02/2010; 35(3):339-41. · 3.40 Impact Factor
• Source

  Available from: Jin-Jin Li

  Article: Parametric coupling between a nanomechanical resonator and a superconducting microwave cavity

  Cheng Jiang, Jin-Jin Li, Wei He, Ka-Di Zhu
  http://dx.doi.org/10.1209/0295-5075/91/58002.