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Proceedings Paper

The designs of XOR logic gates based on photonic crystals
Author(s): Kun-Yi Lee; Jhe-Min Lin; Yi-Cheng Yang; Yi-Bin Yang; Jia-Sing Wu; Yen-Juei Lin; Wei-Yu Lee
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Paper Abstract

All-optical logic gate based on photonic crystal waveguides is a promising technique in future high-speed all-optical signal processing. In this paper, we propose a XOR logic gate based on two dimensional triangular lattice photonic crystals composed of cylindrical silicon rods in air. The main structure of the device is a line defect asymmetric Y branch waveguide. It is expected that there should be a phase shift between the two input beams. Hence, if an appropriate initial phase is introduced, the two input beams may interfere constructively or destructively to realize the logical functions. The simulation results show that the proposed all-optical photonic crystal waveguide structure could really function as XOR logic gates. The interference section length and width of photonic crystal waveguide structure are optimized for achieving the optimal performance for the proposed XOR logic gates. This device is potentially applicable for photonic integrated circuits.

Paper Details

Date Published: 18 November 2008
PDF: 8 pages
Proc. SPIE 7135, Optoelectronic Materials and Devices III, 71353Y (18 November 2008); doi: 10.1117/12.803465
Show Author Affiliations
Kun-Yi Lee, China Institute of Technology (Taiwan)
Jhe-Min Lin, China Institute of Technology (Taiwan)
Yi-Cheng Yang, China Institute of Technology (Taiwan)
Yi-Bin Yang, China Institute of Technology (Taiwan)
Jia-Sing Wu, China Institute of Technology (Taiwan)
Yen-Juei Lin, China Institute of Technology (Taiwan)
Wei-Yu Lee, China Institute of Technology (Taiwan)

Published in SPIE Proceedings Vol. 7135:
Optoelectronic Materials and Devices III
Yi Luo; Jens Buus; Fumio Koyama; Yu-Hwa Lo, Editor(s)

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