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THz spectroscopy of semiconducting plasmonic resonators

  • Giorgos Georgiou
  • , A. Berrier
  • , Martijn C. Schaafsma
  • , Hemant Tyagi
  • , Michael Nagel
  • , Jaime Gómez Rivas

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

Abstract

We investigate the photo-excitation of localized surface plasmon polaritons (LSPPs) in semiconductor structures at THz frequencies by the optical pumping of electrons across the semiconductor energy bandgap. This excitation can be actuated in picosecond time scales, enabling ultrafast THz plasmonics. The concept of active plasmonics can be extended to a full spatial and temporal optical control of plasmonic resonances using the structured illumination of flat semiconductors. This control has lead to the observation of strong capacitive coupling and charge transfer plasmons in dimers with very small gaps. Furthermore, we show that LSPPs can enhance THz local fields in subwavelength volumes by several orders of magnitude. This field enhancement is used to probe very thin organic layers.

Original languageEnglish
Title of host publication2013 38th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2013
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
ISBN (Print)978-1-4673-4717-4
DOIs
Publication statusPublished - 1 Dec 2013
Externally publishedYes
Event38th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2013 - Mainz, Germany
Duration: 1 Sept 20136 Sept 2013
Conference number: 38
http://www.theconference2013.com/

Conference

Conference38th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2013
Abbreviated titleIRMMW-THz 2013
Country/TerritoryGermany
CityMainz
Period1/09/136/09/13
Internet address

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