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Design of nanocomposite film-based plasmonic device for gas sensing

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Abstract

Surface plasmon resonance (SPR) is a very efficient tool for chemical and biological sensing in nanotechnology, nanobiotechnology, medicine and environmental monitoring. A theoretical simulation study incorporating the use of admittance loci design methodology in SPR-based sensing device using gold-tungsten trioxide (Au-WO3−x ) nanocomposite film is reported in this paper. A simple Kretschmann–Raether-type prism-based plasmonic device consisting of a glass prism, Au-WO3−x nanocomposite film and various gas samples is considered. Complex permittivity for both stoichiometric and non-stoichiometric Au-WO3−x nanocomposite films has been used for the simulation of the admittance loci plots, resonance curves and sensitivity curves by considering angular interrogation at a fixed wavelength of 632.8 nm.

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Acknowledgements

Authors would like to acknowledge Centre for Research in Nanoscience and Nanotechnology (CRNN), University of Calcutta, Kolkata, India, for providing the grant. Kaushik Brahmachari is grateful to Technical Education Quality Improvement Programme (TEQIP- Phase II), University of Calcutta, Kolkata, India, for awarding the Senior Research Assistantship to carry out this work.

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Authors and Affiliations

  1. Department of Applied Optics and Photonics, University of Calcutta, Technology Campus, Acharya Prafulla Chandra Roy Shiksha Prangan, JD-2, Sector-III, Salt Lake City, Kolkata, 700 098, India

    KAUSHIK BRAHMACHARI & MINA RAY

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  1. KAUSHIK BRAHMACHARI
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  2. MINA RAY
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Correspondence to MINA RAY.

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BRAHMACHARI, K., RAY, M. Design of nanocomposite film-based plasmonic device for gas sensing. Pramana - J Phys 83, 107–117 (2014). https://doi.org/10.1007/s12043-014-0774-x

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  • DOI: https://doi.org/10.1007/s12043-014-0774-x

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