We have found that a film of amorphous selenium exposed to simultaneous action of two different (Kr+ and Ar+) lasers whose photon energies are on different sides of the optical band gap, crystallizes more slowly than the one exposed to only one of the above. A decisive role of the polarization of the two laser beams has been demonstrated, namely, the suppression of the crystallization rate is observed only for the polarizations of the two light sources being parallel to each other. A microscopic model for the laser-induced suppression of the photocrystallization rate is proposed.
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Roy et al. (1998) studied this question.
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