2016年10月
Broadband and energy-concentrating terahertz coherent perfect absorber based on a self-complementary metasurface
OPTICS LETTERS
- ,
- ,
- ,
- 巻
- 41
- 号
- 19
- 開始ページ
- 4472
- 終了ページ
- 4475
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1364/OL.41.004472
- 出版者・発行元
- OPTICAL SOC AMER
We demonstrate that a self-complementary checkerboard-like metasurface works as a broadband coherent perfect absorber (CPA) when symmetrically illuminated by two counter-propagating incident waves. A theoretical analysis based on wave interference and the results of numerical simulations of the proposed metasurface are provided. In addition, we experimentally demonstrate the proposed CPA in the terahertz regime by using a time-domain spectroscopy technique. We observe that the metasurface can work as a CPA below its lowest diffraction frequency. The size of the absorptive areas of the proposed CPA can be much smaller than the incident wavelength. Unlike conventional CPAs, the presented one simultaneously achieves the broadband operation and energy concentration of electromagnetic waves at the deep-subwavelength scale. (C) 2016 Optical Society of America
- リンク情報
- ID情報
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- DOI : 10.1364/OL.41.004472
- ISSN : 0146-9592
- eISSN : 1539-4794
- Web of Science ID : WOS:000384128300013