All-Optical Diode Suppressing Broadband Backward Transmission Using Single- and Four-Port Photonic Crystal Cavities

IEEE Photonics Journal

Takanori Sato¹  Takeshi Fujisawa¹  Kunimasa Saitoh¹ 

[1] Graduate School of Information Science and Technology, Hokkaido University, Sapporo, Japan;

关键词: Photonic crystal cavity;    resonator;    all-optical device;    and nonlinear optics.;   

DOI  :  10.1109/JPHOT.2018.2888632

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown