Terahertz beam focusing based on plasmonic waveguide scattering

Yasuaki Monnai, Kristian Altmann, Christian Jansen, Martin Koch, Hartmut Hillmer, Hiroyuki Shinoda

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We demonstrate free-space focusing of terahertz (THz) radiation by scattering plasmonic surface-waves into the air. We use a grating of shallow holes which contains non-equidistant defects which act as scattering centers. The scattering occurs with defined phase delays such that the waves emitted in free-space interfere constructively to form a focus above the waveguide surface. In contrast to conventional lenses, this structure does not require any free-space on its backside and has great potential for integrated THz optics.

Original languageEnglish
Article number151116
JournalApplied Physics Letters
Volume101
Issue number15
DOIs
Publication statusPublished - 2012 Oct 8
Externally publishedYes

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waveguides
scattering
integrated optics
surface waves
lenses
gratings
air
defects
radiation

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Monnai, Y., Altmann, K., Jansen, C., Koch, M., Hillmer, H., & Shinoda, H. (2012). Terahertz beam focusing based on plasmonic waveguide scattering. Applied Physics Letters, 101(15), [151116]. https://doi.org/10.1063/1.4759042

Terahertz beam focusing based on plasmonic waveguide scattering. / Monnai, Yasuaki; Altmann, Kristian; Jansen, Christian; Koch, Martin; Hillmer, Hartmut; Shinoda, Hiroyuki.

In: Applied Physics Letters, Vol. 101, No. 15, 151116, 08.10.2012.

Research output: Contribution to journalArticle

Monnai, Y, Altmann, K, Jansen, C, Koch, M, Hillmer, H & Shinoda, H 2012, 'Terahertz beam focusing based on plasmonic waveguide scattering', Applied Physics Letters, vol. 101, no. 15, 151116. https://doi.org/10.1063/1.4759042
Monnai Y, Altmann K, Jansen C, Koch M, Hillmer H, Shinoda H. Terahertz beam focusing based on plasmonic waveguide scattering. Applied Physics Letters. 2012 Oct 8;101(15). 151116. https://doi.org/10.1063/1.4759042
Monnai, Yasuaki ; Altmann, Kristian ; Jansen, Christian ; Koch, Martin ; Hillmer, Hartmut ; Shinoda, Hiroyuki. / Terahertz beam focusing based on plasmonic waveguide scattering. In: Applied Physics Letters. 2012 ; Vol. 101, No. 15.
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