Local THz resonances in semiconductors: Active control of near-fields, THz extinction and beaming

J. Gómez Rivas, G. Georgiou, A. Bhattacharya

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

The versatile nature of semiconductors with a permittivity that can be controlled by the amount of free carriers, makes them excellent materials for active plasmonics and metasurfaces. Structures made out of semiconductors can give rise to localized resonances at THz frequencies. The precise behavior of these structures depends on their geometry and permittivity; parameters that can be actively tuned. Subwavelength local field enhancements are the most relevant characteristic of localized resonances. These enhancements have triggered the interest for resonant metallic structures in sensing and spectroscopic applications. Local field enhancements in plasmonic structures have been thoroughly investigated at optical and infrared frequencies using near field probing techniques [1]. These techniques provide an excellent spatial resolution but they are not sensitive to the individual field components.
Original languageEnglish
Title of host publicationEuropean Conference on Lasers and Electro-Optics, CLEO 2015
PublisherOptical Society of America (OSA)
PagesCC_4_3
Number of pages1
ISBN (Print)9781467374750
Publication statusPublished - 21 Jul 2014
EventConference on Lasers and Electro-Optics, CLEO 2015 - San Jose Convention Center, San Jose, United States
Duration: 10 May 201515 May 2015
Conference number: 11
http://www.cleopr2015.org/

Conference

ConferenceConference on Lasers and Electro-Optics, CLEO 2015
Abbreviated titleCLEO 2015
CountryUnited States
CitySan Jose
Period10/05/1515/05/15
Internet address

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    Gómez Rivas, J., Georgiou, G., & Bhattacharya, A. (2014). Local THz resonances in semiconductors: Active control of near-fields, THz extinction and beaming. In European Conference on Lasers and Electro-Optics, CLEO 2015 (pp. CC_4_3). Optical Society of America (OSA).