| Numéro |
J. Phys. Colloques
Volume 49, Numéro C2, Juin 1988
Optical Bistability - IV
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|
|---|---|---|
| Page(s) | C2-255 - C2-258 | |
| DOI | https://doi.org/10.1051/jphyscol:1988260 | |
Optical Bistability - IV
J. Phys. Colloques 49 (1988) C2-255-C2-258
DOI: 10.1051/jphyscol:1988260
Humboldt-Universität zu Berlin, Sektion Physik, Bereich Halbleiteroptik, Invalidenstrasse 110, DDR-1040 Berlin, D.R.G.
J. Phys. Colloques 49 (1988) C2-255-C2-258
DOI: 10.1051/jphyscol:1988260
OPTICAL NONLINEARITIES OF QUANTUM - CONFINED EXCITONS IN CuBr MICROCRYSTALLITES
U. WOGGON et F. HENNEBERGERHumboldt-Universität zu Berlin, Sektion Physik, Bereich Halbleiteroptik, Invalidenstrasse 110, DDR-1040 Berlin, D.R.G.
Abstract
We study both the linear and nonlinear optical properties of excitons in CuBr-dots for the specific situation, when the radius of the dots is 5 to 10 times larger than the bulk exciton radius. We observe a blue shift of the exciton peak at resonant optical excitation as well as strong saturation of absorption with very large contrast and Lorentzian saturation intensities in the 100 kW/cm2 range. The data are explained in terms of exciton - exciton interaction in the presence of quantum confinement.