Enhanced Terahertz Emission from Monolayer Graphene with Metal Mesh Structure

Taro Itatsu, Eiichi Sano, Yuhei Yabe, Victor Ryzhii, Taiichi Otsuji

Research output: Contribution to journalArticlepeer-review

Abstract

The development of compact, low-cost sources and detectors operating at room temperature is needed to fully use terahertz (THz) electromagnetic waves in a variety of applications. Photo-excited graphene is expected to exhibit population inversion and enable the fabrication of a novel THz laser. We previously proposed a THz amplifier as a basic element in a THz laser by combining the population inversion in photo-excited graphene with the electric field enhancement due to the spoof surface plasmon polaritons induced on the surface of a metal mesh structure. For this work, we fabricated prototype THz amplifiers composed of chemical-vapor-deposition-grown graphene and a metal mesh structure and observed extremely amplified THz emission by using an electro-optic sampling method.

Original languageEnglish
Pages (from-to)S221-S226
JournalMaterials Today: Proceedings
Volume3
DOIs
Publication statusPublished - 2016

Keywords

  • Amplifier
  • Field enhancement effect
  • Graphene
  • Metal mesh structure
  • SPP
  • Surface plasmon
  • Terahertz

ASJC Scopus subject areas

  • Materials Science(all)

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