Abstract
We have discussed that CdSxSe1-x semiconductor doped glasses can be prepared for efficient SHG when the glass is simultaneously exposed to 532 nm and 1.06 µm radiation from a Q-switched and mode-locked laser.1,2 Using 5-cm path length in a 530-nm bandgap filter, we have observed a 10-6 conversion efficiency, which resulted in a green spot visible in room lights. The effect is permanent in some glasses and is a strong function of the position of the microcrystallite bandgap. The SHG obtained for various filter bandgaps is shown in Fig. 1. The phenomenon poses a test to our basic understanding of electronic processes in nanocrystals and heterogeneous glasses and opens a door to new materials for frequency-doubling laser sources.
© 1991 Optical Society of America
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