Focusing of THz waves with a microsize parabolic reflector made of graphene in the free space

被引：25

作者：

Oguzer, Taner ^{[1
]}

Altintas, Ayhan ^{[2
]}

Nosich, Alexander I. ^{[3
]}

机构：

[1] Dokuz Eylul Univ Buca, Dept Elect & Elect Engn, TR-35160 Izmir, Turkey

[2] Bilkent Univ, Dept Elect & Elect Engn, TR-06800 Ankara, Turkey

[3] NASU, Inst Radio Phys & Elect, Lab Micro & Nanoopt, UA-61085 Kharkov, Ukraine

来源：

JOURNAL OF THE EUROPEAN OPTICAL SOCIETY-RAPID PUBLICATIONS | 2017年 / 13卷 / 01期

关键词：

Graphene reflector; Focusing ability; Integral equation; Analytical regularization;

D O I：

10.1186/s41476-017-0041-0

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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.

引用

页数：8

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