Anomalous exciton spectra of laser-driven semiconductor superlattices

Kenta Yashima, Kotaro Oka, Ken ichi Hino, Nobuya Maeshima, Xiao Min Tong

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3 Citations (Scopus)

Abstract

The quasienergy structure of excitonic Floquet states of laser-driven semiconductor superlattices is examined. To understand the detail of it, linear absorption spectra of optical interband transitions invoked by an alternative monochromatic probe laser are calculated based on the Liouvílle equation. It is found that for a strong driving laser, the interminiband interaction, namely, the ac-Zener tunneling, causes a red shift of the spectral peak pertaining to the 1 s-exciton Floquet state, and enlarges the intensity of its concomitant replica bands. In particular, it is noted that one of the replicas exhibits an anomalous negative absorption.

Original languageEnglish
Pages (from-to)823-826
Number of pages4
JournalSolid State Communications
Volume149
Issue number21-22
DOIs
Publication statusPublished - 2009 Jun 1

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Keywords

  • A. Quantum wells
  • A. Semiconductors
  • D. Optical properties

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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