Optimization of nanoantenna-enhanced terahertz emission from photoconductive antennas

S. I. Lepeshov, A. A. Gorodetsky, N. A. Toropov, T. A. Vartanyan, E. U. Rafailov, A. E. Krasnok, P. A. Belov

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Abstract

We present the results of hybrid photoconductive antenna THz emission enhanced by silver nanoantenna arrays. By varying the size of nanoantennas and the distance between them, we obtain the greatest value of optical-to-THz conversion efficiency reached so far. The results of experimental investigations are in a good agreement with numerical simulations. The conversion efficiency reveals over 5-fold improvement at certain frequencies, if compared with similar photoconductive antenna without silver nanoparticles, while previous results for this type of antenna barely exceeded 2-fold conversion efficiency gain.

Original languageEnglish
Article number062060
Number of pages4
JournalJournal of Physics: Conference Series
Volume917
Issue number6
Early online date23 Nov 2017
DOIs
Publication statusPublished - 23 Nov 2017

Bibliographical note

Open Access: Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

Funding: Russian Foundation for Basic Research (Projects 16-07-01166 a, and 16-
37-60076).

Keywords

  • Experimental investigations
  • Nanoantenna arrays
  • Photoconductive antennas
  • Silver nanoparticles
  • Terahertz emissions
  • THz emission

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    Lepeshov, S. I., Gorodetsky, A. A., Toropov, N. A., Vartanyan, T. A., Rafailov, E. U., Krasnok, A. E., & Belov, P. A. (2017). Optimization of nanoantenna-enhanced terahertz emission from photoconductive antennas. Journal of Physics: Conference Series, 917(6), [062060]. https://doi.org/10.1088/1742-6596/917/6/062060