1. Optical gain in monodispersed silicon nanocrystals.
- Author
-
Cazzanelli, M., Navarro-Urriós, D., Riboli, F., Daldosso, N., Pavesi, L., Heitmann, J., Yi, L. X., Scholz, R., Zacharias, M., and Gosele, U.
- Subjects
SILICON ,WAVEGUIDES ,NANOCRYSTALS ,OPTICS ,PARTICLE size determination - Abstract
Stimulated emission from silicon-nanocrystal planar waveguides grown via phase separation and thermal crystallization of SiO/SiO
2 superlattices is presented. Under high power pulsed excitation, positive optical gain can be observed once a good optical confinement in the waveguide is achieved and the silicon nanocrystals have proper size. A critical tradeoff between Auger nonradiative recombination processes and stimulated emission is observed. The measured large gain values are explained by the small size dispersion in these silicon nanocrystals. [ABSTRACT FROM AUTHOR]- Published
- 2004
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