Absorption Spectra of a Graphene Embedded One Dimensional Fibonacci Aperiodic Structure
Subject Areas : Journal of Optoelectronical Nanostructures
1 - Department of Physics, Islamic Azad University, Shabestar Branch, Shabestar, Iran
Keywords: Graphene, Spectroscopy, Band Gap, Quasiperiodic structures,
Abstract :
In this paper, we explore the linear response of one dimensional
quasiperiodic structure based on Fibonacci sequence composed of silicon dioxide,
polystyrene and graphene materials. Here, a graphene monolayer is sandwiched
between two adjacent layers. The numerical results are obtained by using the standard
transfer matrix method. Due to the presence of graphene sheet in each structure, in the
initial range of THz, an additional gap GPBG is induced which is absent in the case of
without graphene. The amplitude of absorption peaks at the upper edge of the GPBG
significantly enhances, when damping factor increases. The height of the absorption
peak at the GPBG edge goes up as the temperature increases. At the GPBG edge, with
increasing the thickness of graphene, the absorption peak rises and shifts to the lower
frequencies. Moreover, we have realized that the amplitude of absorption peaks at the
upper edge of the GPBG significantly enhance by increasing damping factor.
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