Record number :
1001086
Title of article :
Spin dynamics and lifetime of exciton polaritons in CuCl
Author/Authors :
H. Rahimpour Soleimani، نويسنده , , S. Cronenberger، نويسنده , , O. Cre´gut، نويسنده , , Laurence Likforman-Sulem، نويسنده , , José M. Gallart، نويسنده , , T. Ostatnicky، نويسنده , , P. Gilliot، نويسنده , , B. Ho¨nerlage، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2005
Pages :
8
From page :
107
To page :
114
Abstract :
In CuCl, biexcitons may be excited from the semiconductor ground state by two circularly polarized exciton polaritons of opposite helicity.We use this property to develop a new method in order to determine the spin-relaxation dynamics by means of non-degenerate pump–probe experiments. A pump beam first excites a spin-polarized exciton population. Then, we measure the induced absorption of a circularly polarized probe beam at the exciton biexciton transition. It depends on its polarization and the induced absorption dynamics gives information on the spin state of the exciton polariton population. When comparing results obtained in a (s+s+) configuration with that of a (s+s ) configuration, we determine the time evolution of the pseudo-spin of the exciton polaritons as well as their lifetime
Keywords :
Spin flip , CuCl , Exciton-spin dynamics
Journal title :
Applied Surface Science
Journal title :
Applied Surface Science
Serial Year :
2005
Link To Document :
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