Proposal for realizing an all-optical half adder based on photonic crystals

In this paper, we aim to propose an optical structure for realizing half-adder operation without using the nonlinear Kerr effect. Constructive and destructive interference of optical beams is the main working mechanism of the proposed structure. The phase difference required for the destructive inte...

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Bibliographic Details
Published in:Applied optics (2004) 2018-03, Vol.57 (7), p.1617
Main Authors: Serajmohammadi, Somaye, Alipour-Banaei, Hamed, Mehdizadeh, Farhad
Format: Article
Language:English
Subjects:
Beams (radiation)
Gates (circuits)
Photonic crystals
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Summary:In this paper, we aim to propose an optical structure for realizing half-adder operation without using the nonlinear Kerr effect. Constructive and destructive interference of optical beams is the main working mechanism of the proposed structure. The phase difference required for the destructive interface will be created by choosing different lengths for the input waveguides of the XOR gate. For the proposed structure, the on-off contrast ratios for SUM and CARRY are 9.77 dB and 6.98 dB, respectively. Also, the delay time and footprint of the proposed structure are about 4 ps and 1056  μm , respectively.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.57.001617