Focusing of THz waves with a microsize parabolic reflector made of graphene in the free space
Date
2017Source Title
Journal of the European Optical Society
Print ISSN
19902573
Publisher
Springer International Publishing
Volume
13
Issue
1
Language
English
Type
ArticleItem Usage Stats
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Abstract
Background: The scattering of H- and E-polarized plane waves by a two-dimensional (2-D) parabolic reflector made of graphene and placed in the free space is studied numerically. Methods: To obtain accurate results we use the Method of Analytical Regularization. Results: The total scattering cross-section and the absorption cross-section are computed, together with the field magnitude in the geometrical focus of reflector. The surface plasmon resonances are observed in the H-case. The focusing ability of the reflector is studied in dependence of graphene’s chemical potential, frequency, and reflector’s depth. Conclusions: It is found that there exists an optimal range of frequencies where the focusing ability reaches maximum values. The reason is the quick degradation of graphene’s surface conductivity with frequency. © 2017, The Author(s).
Keywords
Analytical regularizationFocusing ability
Graphene reflector
Integral equation
Focusing
Graphene
Integral equations
Surface plasmon resonance
Terahertz waves
Absorption cross sections
Analytical regularization
Method of analytical regularization
Parabolic reflector
Polarized plane waves
Surface conductivity
Total scattering cross sections
Two Dimensional (2 D)
Reflection