Giant terahertz gain by excitation of surface plasmon polarities in optically pumped graphene

Taiichi Otsuji, Takayuki Watanabe, Stephane B. Tombet, Akira Satou, Alexander A. Dubinov, Vladimir Y. Aleshkin, Vladimir Mitin, Victor Ryzhii

研究成果: Conference contribution

抄録

Interband photoexcitation in monolayer graphene can produce a weak gain in the terahertz range by only up to 2.3%, but exciting the surface plasmon polaritons mediates the light-matter interaction, resulting in a giant terahertz gain. Nonlinear carrier relaxation/recombination dynamics and resultant stimulated terahertz (THz) photon emission with excitation of surface plasmon polaritons (SPPs) in photoexcited monolayer graphene has been experimentally studied using optical-pump/THz-probe and optical-probe measurement. We observed the spatial distribution of the THz probe pulse intensities under linear polarization of optical pump and THz probe pulses. It was clearly observed that intense THz probe pulse was detected only at the area where the incoming THz probe pulse takes a TM mode being capable of exciting the SPPs. The observed gain factor is in fair agreement with theoretical calculations.

本文言語English
ホスト出版物のタイトルTerahertz Physics, Devices, and Systems VIII
ホスト出版物のサブタイトルAdvanced Applications in Industry and Defense
出版社SPIE
ISBN(印刷版)9781628410396
DOI
出版ステータスPublished - 2014
イベントTerahertz Physics, Devices, and Systems VIII: Advanced Applications in Industry and Defense - Baltimore, MD, United States
継続期間: 2014 5 52014 5 6

出版物シリーズ

名前Proceedings of SPIE - The International Society for Optical Engineering
9102
ISSN(印刷版)0277-786X
ISSN(電子版)1996-756X

Other

OtherTerahertz Physics, Devices, and Systems VIII: Advanced Applications in Industry and Defense
国/地域United States
CityBaltimore, MD
Period14/5/514/5/6

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学

フィンガープリント

「Giant terahertz gain by excitation of surface plasmon polarities in optically pumped graphene」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル