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Tunability of temperature-dependent absorption in a graphene-based hybrid nanostructure cavity

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  • Arezou Rashidi

    (Faculty of Physics, University of Tabriz)

  • Abdolrahman Namdar

    (Faculty of Physics, University of Tabriz)

Abstract

Enhanced absorption is obtained in a hybrid nanostructure composed of graphene and one-dimensional photonic crystal as a cavity in the visible wavelength range thanks to the localized electric field around the defect layers. The temperature-induced wavelength shift is revealed in the absorption spectra in which the peak wavelength is red-shifted by increasing the temperature. This temperature dependence comes from the thermal expansion and thermo-optical effects in the constituent layers of the structure. Moreover, the absorption peaks can be adjusted by varying the incident angle. The results show that absorption is sensitive to TE/TM polarization and its peak values for the TE mode are higher than the TM case. Also, the peak wavelength is blue-shifted by increasing the incident angle for both polarizations. Finally, the possibility of tuning the absorption using the electro-optical response of graphene sheets is discussed in detail. We believe our study may be beneficial for designing tunable graphene-based temperature-sensitive absorbers.

Suggested Citation

  • Arezou Rashidi & Abdolrahman Namdar, 2018. "Tunability of temperature-dependent absorption in a graphene-based hybrid nanostructure cavity," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 91(4), pages 1-7, April.
    • Handle: RePEc:spr:eurphb:v:91:y:2018:i:4:d:10.1140_epjb_e2018-80506-2
    DOI: 10.1140/epjb/e2018-80506-2
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    Solid State and Materials;

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