This paper proposes for consideration an additional mechanism for influencing the exciton absorption spectra and observing temperature redistribution peculiarities of the crystal absorptive power. They are caused by nonlinear phonon-exciton interactions, which are due to anharmonic effects in the exciton-phonon system. The arising of the borderline frequency, which possesses the smallest region of optical bistability realization, is caused by a break in the direction of the absorption curve. At low temperatures the basic role is played by the exciton-exciton interaction, and at high temperatures nonlinear exciton-exciton-phonon processes play the most important role the value of the borderline frequency is defined by the size and sign of the nonlinear exciton-exciton-phonon function as well as by the crystal temperature and the exciton density, which is created by the external powerful laser wave.

Date Published: 1 December 1997
PDF: 7 pages
Proc. SPIE 3317, International Conference on Correlation Optics, (1 December 1997); doi: 10.1117/12.295663

Published in SPIE Proceedings Vol. 3317:
International Conference on Correlation Optics
Oleg V. Angelsky, Editor(s)