| Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 13, Number 1, 2017
|
|
|---|---|---|
| Article Number | 16 | |
| Number of page(s) | 8 | |
| DOI | https://doi.org/10.1186/s41476-017-0041-0 | |
| Published online | 01 May 2017 | |
Research
Focusing of THz waves with a microsize parabolic reflector made of graphene in the free space
1
Department Electrical and Electronics Engineering, Dokuz Eylul University, Buca, 35160, Izmir, Turkey
2
Department Electrical and Electronics Engineering, Bilkent University, 06800, Ankara, Turkey
3
Laboratory of Micro and Nano Optics, Institute of Radio-Physics and Electronics NASU, 61085, Kharkiv, Ukraine
Received:
30
January
2017
Accepted:
20
April
2017
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.
Key words: Graphene reflector / Focusing ability / Integral equation / Analytical regularization
© The Author(s) 2017
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.