All-Optical Diode Suppressing Broadband Backward Transmission Using Single- and Four-Port Photonic Crystal Cavities
All-Optical Diode Suppressing Broadband Backward Transmission Using Single- and Four-Port Photonic Crystal Cavities
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DOI：
10.1109/jphot.2018.2888632
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发表时间：
2019-02
影响因子：
2.4
通讯作者：
Takanori Sato;T. Fujisawa;K. Saitoh
中科院分区：
文献类型：
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作者：
Takanori Sato;T. Fujisawa;K. Saitoh
介绍了一种利用单端口和四端口光子晶体(PC)腔抑制宽带后向传输的全光二极管及其工作原理。我们发现，通过将四端口PC腔和两个功率依赖移相器相结合，在基于非线性谐振器的全光二极管中，对于任意输入功率和任意输入波长，后向透过率理论上为0。为了验证该方法的有效性，基于非线性光束传输方法和耦合模理论进行了数值分析。结果表明，该方案可以实现−4d B的前向传输和35d B的大非互易传输比。
We present an all-optical diode suppressing broadband backward transmission using single-port and four-port photonic crystal (PC) cavities and its operation principle. We find that, by combining a four-port PC cavity and two power-dependent phase shifters that are composed by a 3-dB power divider and two single-port PC cavities, the backward transmission in the nonlinear-resonator-based all-optical diode becomes theoretically 0% for any input power and any input wavelength. To confirm the validity of our approach, the numerical analysis based on the nonlinear beam propagation method as well as the coupled mode theory is performed. The results prove that the forward transmission of −4 dB and large nonreciprocal transmission ratio of 35 dB are achievable.