Intersubband exchange interaction induced by optically excited electron spins in GaAs/AlGaAs quantum wells

K. Morita, H. Sanada, S. Matsuzaka, Y. Ohno, H. Ohno

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Spin-dependent intersubband excitonic interactions have been investigated in GaAs/AlGaAs quantum wells by two-color pump and probe spectroscopy. We generated spin-polarized electrons in the lowest subband by resonant excitation of the heavy-hole exciton (E1 -HH1) and observed polarization-dependent broadening of the second-subband exciton resonance (E2 -HH2 and E2 -LH1). The exchange interaction between the first and the second-subband excitons is found to play a crucial role in polarization-dependent spectral modulation as well as spin-independent Coulomb screening.

Original languageEnglish
Article number162104
JournalApplied Physics Letters
Volume94
Issue number16
DOIs
Publication statusPublished - 2009 May 6

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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