Direct observation of picosecond spin relaxation of excitons in GaAs/AlGaAs quantum wells using spin-dependent optical nonlinearity

Atsushi Tackeuchi, Shunichi Muto, Tsuguo Inata, Toshio Fujii

Research output: Contribution to journalArticle

113 Citations (Scopus)


We have directly observed spin relaxation of excitons in the picosecond region using time-resolved polarization absorption measurements. With the help of spin-dependent optical nonlinearity of excitonic absorption, we obtained a fast decay of spin-up carriers and a fast accumulation of spin-down carriers with a spin relaxation time of 32 ps for a GaAs/Al0.51Ga 0.49As multiple quantum well at room temperature with a time resolution of 1 ps.

Original languageEnglish
Pages (from-to)2213-2215
Number of pages3
JournalApplied Physics Letters
Issue number22
Publication statusPublished - 1990 Dec 1


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this