| Numéro |
J. Phys. Colloques
Volume 49, Numéro C2, Juin 1988
Optical Bistability - IV
|
|
|---|---|---|
| Page(s) | C2-213 - C2-217 | |
| DOI | https://doi.org/10.1051/jphyscol:1988250 | |
Optical Bistability - IV
J. Phys. Colloques 49 (1988) C2-213-C2-217
DOI: 10.1051/jphyscol:1988250
Department of Applied Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan
J. Phys. Colloques 49 (1988) C2-213-C2-217
DOI: 10.1051/jphyscol:1988250
QUANTUM DOTS AND WELLS WITH ENHANCED OPTICAL NONLINEARITY AND FAST RESPONSE
E. HANAMURADepartment of Applied Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan
Abstract
Exciton, which is a coherent superposition of constituent atoms, has a macroscopic transition dipole moment and a large oscillator strength. The exciton, however, behaves almost as a harmonic oscillator so that it cannot contribute in itself to the nonlinear response. Therefore we propose two new functionality materials with large optical nonlinearity by making the exciton deviate very much from harmonic oscillator and at the same time making use of the large oscillator strength of the exciton : assembly of semiconductor microcrystallites and quantum wells.