Plasmon-enhanced terahertz photodetection in graphene

Xinghan Cai, Andrei B Sushkov, Mohammad M Jadidi, Luke O Nyakiti, Rachael L Myers-Ward, D Kurt Gaskill, Thomas E Murphy, Michael S Fuhrer, H Dennis Drew

Research output: Contribution to journalArticleResearchpeer-review

67 Citations (Scopus)

Abstract

We report a large area terahertz detector utilizing a tunable plasmonic resonance in subwavelength graphene microribbons on SiC(0001) to increase the absorption efficiency. By tailoring the orientation of the graphene ribbons with respect to an array of subwavelength bimetallic electrodes, we achieve a condition in which the plasmonic mode can be efficiently excited by an incident wave polarized perpendicular to the electrode array, while the resulting photothermal voltage can be observed between the outermost electrodes.
Original languageEnglish
Pages (from-to)4295-4302
Number of pages8
JournalNano Letters
Volume15
Issue number7
DOIs
Publication statusPublished - 2015

Keywords

  • Graphene
  • photodetection
  • plasmons
  • terahertz

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