Hole spin-relaxation in quantum wells from saturation of inter-subband absorption

J. Kainz, Petra Schneider, S. D. Ganichev, U. Rössler, W. Wegscheider, D. Weiss, W. Prettl, V. V. Bel'kov, L. E. Golub, D. Schuh

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


Spin-sensitive saturation of absorption of infrared radiation has been investigated in p-type GaAs QWs. It is shown that the absorption saturation of circularly polarized radiation is mostly controlled by the spin relaxation time of the holes. The saturation behavior has been investigated for different QW widths and in dependence on the temperature with the result that the saturation intensity substantially decreases with smaller QW width. Spin relaxation times were experimentally obtained by making use of calculated (linear) absorption coefficients for inter-subband transitions. The question of selection rules for intersubband transitions between hole subbands is addressed.

Original languageEnglish
Pages (from-to)418-421
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number1-3
StatePublished - Apr 2004
Externally publishedYes
Event15th International Conference on ELectronic Propreties - Nara, Japan
Duration: 14 Jul 200318 Jul 2003


  • Hole spin-relaxation
  • Inter-subband transition
  • Saturation of absorption


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