Population inversion of photoexcited electrons and holes in graphene and its negative terahertz conductivity

Victor Ryzhii, Maxim Ryzhii, Taiichi Otsuji

研究成果: Conference article査読

20 被引用数 (Scopus)

抄録

We demonstrate that sufficiently strong optical excitation may result in the population inversion in graphene, so that the real part of the ac conductivity can be negative in the terahertz range of frequencies. We study also how the heating of the electron-hole system influences the effect of negative ac conductivity. The effect of population inversion and negative ac conductivity might be used in graphene-based coherent sources of terahertz electromagnetic radiation.

本文言語English
ページ(範囲)261-264
ページ数4
ジャーナルPhysica Status Solidi (C) Current Topics in Solid State Physics
5
1
DOI
出版ステータスPublished - 2008 6 30
イベント15th International Conference on Nonequilibrium Carrier Dynamics in Semiconductors, HCIS15 - Tokyo, Japan
継続期間: 2007 7 232007 7 27

ASJC Scopus subject areas

  • 凝縮系物理学

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