Journal of South China University of Technology (Natural Science Edition) ›› 2017, Vol. 45 ›› Issue (6): 15-19.doi: 10.3969/j.issn.1000-565X.2017.06.003

• Physics • Previous Articles     Next Articles

Investigation into All-Optical Diode Based on Cascaded Nonlinear Microcavity

LI Chao1,2 WANG Min1 LIU Dao-liu1 HU Yong-lu1 WU Jun-fang1,2   

  1. 1.School of Physics and Optoelectronics,South China University of Technology,Guangzhou 510640,Guangdong,China; 2.University of Wisconsin-Madison,Madison 53705,Wisconsin,USA
  • Received:2016-03-18 Revised:2017-01-16 Online:2017-06-25 Published:2017-05-02
  • Contact: 李潮(1976-)，男，博士，副教授，主要从事微纳光子学领域的研究． E-mail:lichao@scut.edu.cn
  • About author:李潮(1976-)，男，博士，副教授，主要从事微纳光子学领域的研究．
  • Supported by:

    Supported by the National Natural Science Foundation of China(11304099)and the Natural Science Foundation of Guangdong Province(S2013040015639)

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Abstract:

All-optical diode is one of the key devices of future optical communication and photonic computer.In this paper,the nonreciprocal optical transmission characteristics of a new-type all-optical diode based on nonlinear photonic crystal (PC) are analyzed by means of finite difference time domain,and two ultrashort pulse lasers are used to pump the PC directly-coupled microcavity and the side-coupled microcavity,respectively,so that the non- linear optical bistable state of the two microcavities can be accurately adjusted and a high-performance optical di- ode,which is of a unidirectional transmission rate up to 90% and a forward-reverse transmission contrast ratio of more than 80,is realized in a broad operating bandwidth of more than 0. 44nm (dozens of times that in the litera- ture).

Key words: all-optical diode, photonic crystal, optical bistable state, finite difference time domain

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