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

Arezou Rashidi () and Abdolrahman Namdar
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Arezou Rashidi: Faculty of Physics, University of Tabriz
Abdolrahman Namdar: Faculty of Physics, University of Tabriz

The European Physical Journal B: Condensed Matter and Complex Systems, 2018, vol. 91, issue 4, 1-7

Abstract: 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.

Keywords: Solid; State; and; Materials (search for similar items in EconPapers)
Date: 2018
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DOI: 10.1140/epjb/e2018-80506-2

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