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TERAHERTZ METAMATERIAL MODULATORS BASED ON ABSORPTION
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.ORCID iD: 0000-0002-3401-1125
2011 (English)In: PROG ELECTROMAGN RES, ISSN 1559-8985, Vol. 119, 449-460 p.Article in journal (Refereed) Published
Abstract [en]

Metamaterial absorbers can perfectly absorb an incident wave in a narrow frequency band. In this paper, metamaterial absorbers are used to construct a terahertz modulator. By controlling the carrier density in the n-doped semiconductor spacer between a patterned metallic superstructure and a metallic ground with different applied voltage bias, the absorption varies sensitively, and the reflected wave amplitude acting as the modulated signal can be strongly modulated. Two types of modulators are investigated, one of which possesses an array of metallic crosses as the superstructure, and the other has a complementary superstructure. Compared with the former, the latter may give a better modulation performance.

Place, publisher, year, edition, pages
2011. Vol. 119, 449-460 p.
Keyword [en]
NEGATIVE REFRACTION, ABSORBER, INDEX, TRANSFORMATION
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-48001DOI: 10.2528/PIER11061304ISI: 000295720900027Scopus ID: 2-s2.0-80052399892OAI: oai:DiVA.org:kth-48001DiVA: diva2:456675
Note
Qc 20111115Available from: 2011-11-15 Created: 2011-11-15 Last updated: 2013-11-19Bibliographically approved

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He, Sailing L.

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