Nonlinear optical response of interacting excitons

Leonid V. Keldysh

doi:10.1117/12.200966

9 February 1995 Nonlinear optical response of interacting excitons

Leonid V. Keldysh

Proceedings Volume 2362, International Conference on Excitonic Processes in Condensed Matter; (1995) https://doi.org/10.1117/12.200966
Event: Excitonic Processes in Condensed Matter: International Conference, 1994, Darwin, Australia

Abstract

In the vicinity of the direct intrinsic absorption threshold in semiconductors nonlinearity of the optical response is dominated by manybody interaction effects in the polarization cloud accompanying the propagation of the electromagnetic field. This polarization is essentially the system of electron-hole pairs. Its evolution with increasing density (radiation intensity) is analyzed in the framework of simplified model substituting effective short range pseudopotential instead of real Coulomb potential. At moderate densities excitonic resonance is essentially modified by the formation of excitonic molecules. Multistable behavior arise. Transient processes are discussed including gradual formation of bound state-excitons and excitonic molecules. The latter manifest themselves in anomalously large four-wave mixing amplitude.

Citation Download Citation

Leonid V. Keldysh "Nonlinear optical response of interacting excitons", Proc. SPIE 2362, International Conference on Excitonic Processes in Condensed Matter, (9 February 1995); https://doi.org/10.1117/12.200966

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