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，k=0时，光子晶体的透射相移呈近线性变化；而k≥1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。
By using the transfer matrix method, phase properties of the transmitted light were studied from one-dimensional photonic crystal coupled-defect structure with the form as （HL）kA（LH）k containing N defects. It is found that for k = 0, the transmitted phase curve is nearly linear. While for k ≥ 1, the transmitted phase curve is stepwise and changes drastically around each transmitted peak with the corresponding phase-shift π or so. When introducing nonlinear materials, slight change of refractive index will 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, the sensitive all-optical switch and logic gate devices were designed as examples.
出处
《量子电子学报》
CAS
CSCD
北大核心
2013年第2期250-256,共7页
Chinese Journal of Quantum Electronics
基金
华南理工大学中央高校基本科研业务费专项资金(2011ZM0087)资助项目
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
optoelectronics
photonic crystals
transfer matrix method
phase
all-optical switches
logic gates
