All-optical XOR and OR logic gates based on line and point defects in 2-D photonic crystal

被引：95

作者：

Goudarzi, Kiyanoosh ^{[1
]}

Mir, Ali ^{[1
]}

Chaharmahali, Iman ^{[2
]}

Goudarzi, Dariush ^{[3
]}

机构：

[1] Lorestan Univ, Fac Engn, Khorramabad, Iran

[2] Islamic Azad Univ, Andimeshk Branch, Fac Engn, Andimeshk, Iran

[3] Islamic Azad Univ, Borujerd Branch, Fac Engn, Borujerd, Iran

来源：

OPTICS AND LASER TECHNOLOGY | 2016年 / 78卷

关键词：

Photonic crystal waveguide; Defect; Phase difference; Logic gate; SELF-COLLIMATED BEAMS;

D O I：

10.1016/j.optlastec.2015.10.013

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper, we have proposed an all-optical logic gate structure based on line and point defects created in the two dimensional square lattice of silicon rods in air photonic crystals (PhCs). Line defects are embedded in the Gamma X and Gamma Z directions of the momentum space. The device has two input and two output ports. It has been shown analytically whether the initial phase difference between the two input beams is pi/2, they interfere together constructively or destructively to realize the logical functions. The simulation results show that the device can acts as a XOR and an OR logic gate. It is applicable in the frequency range of 0-0.45 (a/lambda), however we set it at (a/lambda=) 0.419 for low dispersion condition, correspondingly the lambda is equal to 1.55 mu m. The maximum delay time to response to the input signals is about 0.4 ps, hence the speed of the device is about 2.5 THz. Also 6.767 dB is the maximum contrast ratio of the device. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：139 / 142

页数：4

共 17 条

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Ali M., 2013, INT RES J APPL BASIC, V4, P972

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