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1 August 2021 Graphene-strontium titanate-based metamaterial for optical sensing
E.M. Sheta, P. K. Choudhury
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Proceedings Volume 11802, Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XVIII; 118020Y (2021) https://doi.org/10.1117/12.2594543
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States
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Abstract
Switching and/or sensing characteristics of a specially designed three-layer metamaterial configuration were studied. In particular, the top metasurface is comprised of squared pixels of strontium titanate (SrTiO3) and graphene mediums, deposited over an InSb nanolayer; the SiO2 dielectric medium constitutes the bottom substrate. The proposed structure could be artificially controlled and tuned, and therefore, the effects due to altering ambient temperature, graphene chemical potential and magnetostatic bias were studied. The results exhibit high sensitivity resonance transmission in the THz frequency range. The optical switching ON/OFF states of the structure, as represented in the form of transmission spectra, were reported supporting very high (~98%) or almost vanishing transmission.
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E.M. Sheta and P. K. Choudhury "Graphene-strontium titanate-based metamaterial for optical sensing", Proc. SPIE 11802, Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XVIII, 118020Y (1 August 2021); https://doi.org/10.1117/12.2594543
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KEYWORDS
Terahertz radiation
Magnetism
Electromagnetism
Thin films
Optical properties
Switching
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