Relaxation of excited absorption in Zns-Cs monocrystals

Viktor P. Gribkovskii, Lev Zimin, С. В. Гапоненко +3 more

С. В. Гапоненко, Igor Malinovsky, Lev T. Perelman +1 more

James M. Noras

The absorption and excitation spectra of a strong photoinduced band found in samples of ZnS:Mn at 6 and 77K are reported. The process involves first the population of a metastable level and subsequently excitation to a higher level, which shows the induced absorption. The centre responsible is not identified.

Elena Kuznetsova, Roman L. Kolesov, Olga A. Kocharovskaya

B. C. Svensson, Gaetano Assanto, Ursula J. Gibson +2 more

Prism coupling of an argon laser into a ZnS waveguide was investigated for power slew rates much less than the nonlinearity relaxation time. The asymmetries and switching as a function of coupling conditions predicted by Carter and Chen1 are demonstrated clearly for the first time, we believe. In addition we also observed increasing absorption bistability2 in conditions consistent with the angular switching results but different from those in which bistability has been previously reported in ZnS waveguides.3

P. Le Boulanger, J.-l. Dorralan, S. Girard +1 more