The propagation of intensity-modulated laser radiation in a barium—sodium niobate crystal is studied in an external electric field. The possibility of controlling a nonlinear local response of the crystal is demonstrated. It is shown experimentally that the conditions of formation of a one-dimensional spatial soliton can be changed by varying the nonlinear response of the crystal.

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Journal of Applied Spectroscopy

Formation of a complex nonlinear response in bichromophore solutions

Leonid I. Burov, Sergey K. Gorbatsevich, Vladimir I. Tomin

Published May 1, 1997• 0 citations

Publisher

DOI: 10.1007/bf02675100

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Biexcitonic complexes in a ZnSe single quantum well are investigated by spectrally resolved four-wave mixing (FWM). The formation of heavy-heavy-hole

{\mathrm{XX}}_{h}

and of mixed heavy-light-hole

{\mathrm{XX}}_{m}

biexcitons showing binding energies of ${\ensuremath{\Delta}}_{h}=4.8\mathrm{meV}$ and ${\ensuremath{\Delta}}_{m}=2.8\mathrm{meV}$ is identified by polarization selection rules. The coherent dynamics of the FWM response and the observed FWM intensity ratio between the

{\mathrm{XX}}_{h}

and

{\mathrm{XX}}_{m}

biexciton-induced nonlinear signals are in agreement with the solution of an extended optical Bloch equation.