J4 ›› 2013, Vol. 30 ›› Issue (2): 250-256.

• 光通信 • 上一篇    

光子晶体透射相位特性在全光开关和逻辑门中的应用

梁文耀,徐梓浩,梁俊铿,陈亿菁   

  1. 华南理工大学理学院物理系, 广东 广州 510640
  • 收稿日期:2012-02-20 修回日期:2012-05-10 出版日期:2013-03-28 发布日期:2013-03-14
  • 通讯作者: 梁文耀(1981-)广东人,博士,讲师,从事光子晶体与特异材料的研究。 E-mail:liangwenyao@scut.edu.cn
  • 基金资助:
    华南理工大学中央高校基本科研业务费专项资金资助(2011ZM0087)

Applications of the transmitted phase properties of photonic crystals in all-optical switches and logic gates

  1. Department of Physics, School of Science, South China University of Technology, Guangzhou 510640, China
  • Received:2012-02-20 Revised:2012-05-10 Published:2013-03-28 Online:2013-03-14

摘要: 利用传输矩阵法详细研究了形如(HL)kA(LH)k的含N个耦合缺陷一维光子晶体的透射相位特性。研究表明,当 时,光子晶体的透射相移呈近线性变化;而当 时,透射相位曲线在整个禁带范围内呈阶梯变化,且在每个缺陷模附近透射相位随频率迅速改变,其相移量约等于π。当在光子晶体中引入非线性折射率材料时,折射率的微小改变将导致透射光产生π相移,而且此相移过程中透射率接近于零,这有利于减少动态啁啾对透射光信号的影响。光子晶体的这种π透射相移特性可用于设计各种新型相位器件。根据这一原理,设计了全光开关及逻辑门并讨论了其工作原理。

关键词: 光电子学, 光子晶体, 传输矩阵法, 相位, 全光开关, 逻辑门

Abstract: By using the transfer matrix method, we studied the phase properties of the transmitted light from one-dimensional photonic crystal coupled-defect structure with the form as (HL)kA(LH)k containing N defects. It is found that for , the transmitted phase curve is nearly linear; while for , the transmitted phase curve is stepwise and changes drastically around each transmitted peak with the corresponding phase-shift one π or so. When introducing nonlinear materials, slight change of refractive index would result in a perfect π phase-transition. Moreover, the transmittance is near zero at the π-phase-transition, which is helpful to reduce the influence by the dynamic chirp. Such phase properties hold great promise in designing various phase devices. Based on these properties, we designed sensitive all-optical switch and logic gate devices as examples here.

Key words: optoelectronics, photonics crystals, transfer matrix method, phase, all-optical switches, logic gates

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