Title :
Relationship between spin relaxation and excitonic nonlinearity in an organic-inorganic hybrid quantum-well material
Author :
Toda, M. ; Umeda, K. ; Yajima, C. ; Arai, Y. ; Kunugita, H. ; Ema, K.
Author_Institution :
Dept. of Phys., Sophia Univ., Tokyo, Japan
Abstract :
This study analyzed the influence of the spin relaxation on the excitonic nonlinearity using a 7-level model, and found that it is important to clarify whether coherence is conserved in spin relaxation process or not. If the coherence is perfectly conserved, the nonlinearity will not have size dependence. On the other hand, if the coherence is not conserved, the nonlinearity has coherent size dependence. In order to clarify this point three-pulse four-wave mixing with several polarization configurations at the exciton resonance was performed.
Keywords :
excitons; light coherence; light polarisation; multiwave mixing; optical materials; organic-inorganic hybrid materials; quantum wells; 7-level model; coherence conservation; coherent size dependence; exciton resonance; excitonic nonlinearity; organic-inorganic hybrid material; polarization configurations; quantum-well material; spin relaxation; three-pulse four-wave mixing; Coherence; Delay effects; Dielectric materials; Excitons; Optical materials; Organic materials; Polarization; Quantum wells; Resonance; Semiconductor materials;
Conference_Titel :
Quantum Electronics Conference, 2005. EQEC '05. European
Print_ISBN :
0-7803-8973-5
DOI :
10.1109/EQEC.2005.1567270
