Ultracompact tunable bifunctional XOR and XNOR photonic crystal logic gates

被引：10
作者：
Ibrahim, Mahmoud Salman S. [1 ]
El-Okr, Mohammed M. [2 ]
Hamed, M. Kotb Gad [2 ]
Obayya, Salah Sabry A. [3 ,4 ]
Hameed, Mohamed Farhat O. [3 ,5 ,6 ]
机构：
[1] Arish Univ, Fac Sci, Phys Dept, Arish, Egypt
[2] Al Azhar Univ, Fac Sci, Phys Dept, Cairo, Egypt
[3] Zewail City Sci & Technol, Ctr Photon & Smart Mat, Giza, Egypt
[4] Mansoura Univ, Fac Engn, Elect & Commun Engn Dept, Mansoura, Egypt
[5] Zewail City Sci & Technol, Nanotechnol & Nanoelect Engn Program, Giza, Egypt
[6] Mansoura Univ, Fac Engn, Math & Engn Phys Dept, Mansoura, Egypt
来源：
OPTICAL ENGINEERING | 2020年 / 59卷 / 02期
关键词：
photonic crystal; photonic logic gates; nematic liquid crystal; plane wave expansion method; ALL-OPTICAL NOR; ULTRA-COMPACT; MULTIMODE INTERFERENCE; WAVE-GUIDES; NAND GATES; DESIGN; REALIZATION; IMPLEMENTATION; SIMULATION;
D O I：
10.1117/1.OE.59.2.027106
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Ultracompact simultaneous XOR and XNOR logic gates are proposed and analyzed. The suggested design is based on two-dimensional Si photonic crystal (PhC) with a central hole infiltrated by nematic liquid crystal (NLC) of type E7. The plane wave expansion method is used to obtain the photonic bandgap for both transverse electric mode and transverse magnetic mode. Further, the transmission through the proposed logic gates is calculated by the full vectorial finite element method. The numerical results show that the reported XOR and XNOR logic gates can be operated around wavelength of 1500 nm. In addition, the operation of the designed logic gates can be switched on/off by controlling the NLC biasing state. Such PhC logic gates have a compact size of 47 mu m(2) and can achieve a large contrast ratio of 26 dB. Therefore, the suggested design has advantages in terms of tunability, low power consumption, compact size, simplicity, and compatibility with nowadays fabrication technology, which will be suitable for photonic integrated circuits. (C) 2020 Society of Photo-Optical Instrumentation Engineers (SPIE)
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页数：18
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