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Journal of Computational Electronics
Published in: Journal of Computational Electronics 1/2015

01-03-2015

Ultrafast all-optical universal logic gates with graphene and graphene-oxide metal porphyrin composites

Authors: Chandresh Yadav, Sukhdev Roy

Published in: Journal of Computational Electronics | Issue 1/2015

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Abstract

We present a detailed theoretical analysis of reverse saturable absorption (RSA) in graphene with picosecond laser pulses at 532 nm, and in graphene-oxide (GO)-metal porphyrin composites with femtosecond (fs) laser pulses at 800 nm. Increase in pulse intensity leads to increased contrast in graphene due to strong two-photon absorption (TPA) and larger excited-state absorption coefficients in comparison to GO and GO-metal porphyrin composite materials. The RSA characteristics are sensitive to pump pulse intensity and pulse width, TPA coefficient and concentration and have been theoretically optimized to design all-optical NOT and the universal NOR and NAND logic gates. Femtosecond operation at relatively lower pump intensities (GW/cm\(^{2})\) compared to Cu-Pc doped PMMA thin films (TW/cm\(^{2})\) and GO thin films (GW/cm\(^{2})\) demonstrates the applicability of GO-metal porphyrin composites for ultrafast all-optical information processing.
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Metadata
Title
Ultrafast all-optical universal logic gates with graphene and graphene-oxide metal porphyrin composites
Authors
Chandresh Yadav
Sukhdev Roy
Publication date
01-03-2015
Publisher
Springer US
Published in
Journal of Computational Electronics / Issue 1/2015
Print ISSN: 1569-8025
Electronic ISSN: 1572-8137
DOI
https://doi.org/10.1007/s10825-014-0633-5

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