Bell Bryn A, He Jiakun, Xiong Chunle, Eggleton Benjamin J
Opt Express. 2016 Mar 7;24(5):5235-5242. doi: 10.1364/OE.24.005235.
Quantum communication networks require single photon frequency converters, whether to shift photons between wavelength channels, to shift photons to the operating wavelength of a quantum memory, or to shift photons of different wavelengths to be of the same wavelength, to enable a quantum interference. Here, we demonstrate frequency conversion of laser pulses attenuated to the single photon regime in an integrated silicon-on-insulator device using four-wave mixing Bragg scattering, with conversion efficiencies of up to 12%, or 32% after correcting for nonlinear loss created by the pump lasers. The frequency shift can be conveniently chosen by tuning of the pump frequencies. We demonstrate that such frequency conversion enables interference between photons at different frequencies.
量子通信网络需要单光子频率转换器，无论是用于在波长通道之间转移光子、将光子转移到量子存储器的工作波长，还是将不同波长的光子转移到相同波长，以实现量子干涉。在此，我们展示了在集成绝缘体上硅器件中利用四波混频布拉格散射对衰减到单光子状态的激光脉冲进行频率转换，转换效率高达12%，在校正泵浦激光产生的非线性损耗后为32%。通过调整泵浦频率可以方便地选择频率偏移。我们证明了这种频率转换能够实现不同频率光子之间的干涉。
