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

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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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Acknowledgments

The authors are grateful to the Department of Science and Technology and the University Grants Commission (UGC), Government of India, for partial support of this work. C. Y. thanks UGC for the award of a research fellowship.

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Authors and Affiliations

  1. Department of Physics and Computer Science, Dayalbagh Educational Institute, Dayalbagh, Agra, 282 005, India

    Chandresh Yadav & Sukhdev Roy

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  1. Chandresh Yadav
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  2. Sukhdev Roy
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Correspondence to Sukhdev Roy.

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Yadav, C., Roy, S. Ultrafast all-optical universal logic gates with graphene and graphene-oxide metal porphyrin composites. J Comput Electron 14, 209–213 (2015). https://doi.org/10.1007/s10825-014-0633-5

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