All-optical half adder based on cross structures in two-dimensional photonic crystals

被引：125

作者：

Liu, Qiang ^{[1
,2
,3
]}

Ouyang, Zhengbiao ^{[1
,2
,3
]}

Wu, Chih Jung ^{[4
]}

Liu, Chung Ping ^{[4
]}

Wang, Jong C. ^{[4
]}

机构：

[1] Shenzhen Univ, THz Tech Res Ctr, Shenzhen 518060, Peoples R China

[2] Shenzhen Key Lab Micronano Photon Informat Tech, Shenzhen 518060, Peoples R China

[3] Shenzhen Univ, Coll Elect Sci & Technol, Shenzhen 518060, Peoples R China

[4] Yuan Ze Univ, Dept Elect Engn, Tao Yuan 320, Taiwan

来源：

OPTICS EXPRESS | 2008年 / 16卷 / 23期

关键词：

D O I：

10.1364/OE.16.018992

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose an all-optical half adder based on two different cross structures in two-dimensional photonic crystals. One cross structure contains nonlinear materials and functions as an "AND" logic gate. The other one only contains linear materials and acts as an "XOR" logic gate. The system is demonstrated numerically by the FDTD method to work as expected. The optimal operating speed without considering the response time of the nonlinear material, the least ON to OFF logic-level contrast ratio, and the minimum power for this half adder obtained were 0.91Tbps, 16dB and 436mW, respectively. The proposed structure has the potential to be used for constructing all-optical integrated digital computing circuits. (C) 2008 Optical Society of America

引用

页码：18992 / 19000

页数：9

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