PROJECT TITLE :
Phase Control of Optical Nonreciprocity in Photonic Bandgap Four-Wave Mixing
We investigate the optical nonreciprocity induced by the parametrical amplification and the radiation trapping in an atomic photonic bandgap system each theoretically and experimentally. We tend to use two pumping fields to generate entangled photon pairs from spontaneous parametric four-wave mixing, also because the signals in that they will be enhanced by the feedback dressing effect. Thus, the frequency distinction and the shape change due to this feedback dressing on the 2-arm ramps of 1 round trip are observed. Such optical nonreciprocity can be easily controlled by multiple experimental parameters (frequency detuning, power, and phase) of the dressing beams. Additionally, the enhancement and suppression switching induced by the double dressing or triple dressing conditions are also studied. This optical nonreciprocity will contribute to the development of quantum data processing and quantum communications.
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