Abstract
AbstractTransmission and luminescence properties of CdS around the fundamental absorption edge at room temperature are investigated. Experimental results suggest that increasing absorption non‐linearity is related to two mechanisms. One is ascribed to the absorption red shift of exciton–electron (ex–el) scattering with increasing input laser intensity. A qualitative analysis and discussion about the nonlinearity due to ex–el scattering are given. The other is lattice heating of samples with cw laser illumination. The optical bistability due to thermal effect is observed.
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