Effects of carrier-carrier scattering on population inversion in graphene under pulse photoexcitation

Akira Satou, Victor Ryzhii, Taiichi Otsuji

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)

Abstract

We study the carrier relaxation dynamics in intrinsic graphene after pulse photoexcitation and reveal effects of intraband carrier-carrier scattering on population inversion in the terahertz region, by conducting simulation based on the quasi-classical Boltzmann equation. It is demonstrated that by changing the dielectric constant of the surrounding materials the rate of carrier-carrier scattering can be controlled and the relaxation dynamics differs for cases with low and high dielectric constants. It is also found that the Pauli blocking of photogeneration in case of the pulse photoexcitation causes decrease in the photocarrier concentration and thus weakening of population inversion with higher dielectric constant.

Original languageEnglish
Article number012018
JournalJournal of Physics: Conference Series
Volume584
Issue number1
DOIs
Publication statusPublished - 2015
EventInternational Scientific Seminars on Fundamental and Applied Problems of Photonics and Condensed Matter Physics 2014 - Moscow, Russian Federation
Duration: 2014 May 302014 Jun 27

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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