Negative dynamic conductivity of graphene with optical pumping

V. Ryzhii, M. Ryzhii, T. Otsuji

Research output: Contribution to journalArticle

282 Citations (Scopus)

Abstract

We study the dynamic ac conductivity of a nonequilibrium two-dimensional electron-hole system in optically pumped graphene. Considering the contribution of both interband and intraband transitions, we demonstrate that at sufficiently strong pumping the population inversion in graphene can lead to the negative net ac conductivity in the terahertz range of frequencies. This effect might be used in graphene-based coherent sources of terahertz radiation.

Original languageEnglish
Article number083114
JournalJournal of Applied Physics
Volume101
Issue number8
DOIs
Publication statusPublished - 2007 May 9

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Negative dynamic conductivity of graphene with optical pumping'. Together they form a unique fingerprint.

  • Cite this