Anomalous exciton spectra of laser-driven semiconductor superlattices

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

Research output: Contribution to journalArticle

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

Fingerprint

Semiconductor superlattices
Excitons
superlattices
excitons
replicas
Optical transitions
Lasers
lasers
Absorption spectra
optical transition
red shift
absorption spectra
probes
causes
LDS 751
interactions

Keywords

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

ASJC Scopus subject areas

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

Cite this

Anomalous exciton spectra of laser-driven semiconductor superlattices. / Yashima, Kenta; Oka, Kotaro; Hino, Ken ichi; Maeshima, Nobuya; Tong, Xiao Min.

In: Solid State Communications, Vol. 149, No. 21-22, 06.2009, p. 823-826.

Research output: Contribution to journalArticle

Yashima, Kenta ; Oka, Kotaro ; Hino, Ken ichi ; Maeshima, Nobuya ; Tong, Xiao Min. / Anomalous exciton spectra of laser-driven semiconductor superlattices. In: Solid State Communications. 2009 ; Vol. 149, No. 21-22. pp. 823-826.
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