Observation of high-index states in CdS1−xSex semiconductor microcrystallites by two-photon spectroscopy

Abstract

${\mathrm{CdS}}_{1\mathrm{-}\mathit{x}}$ ${\mathrm{Se}}_{\mathit{x}}$ semiconductor doped glasses have been investigated by two- and one-photon absorption photoluminescence excitation techniques. The complementary parity selection rules of the linear and nonlinear processes have allowed the direct observation of several low- and high-index states. A comparison between the experimental results and the effective-mass-approximation calculations has shown the important role played by the hydrostatic pressure that the glass matrix exerts on semiconductor microcrystallites. Also the contribution of valence-band splitting has been considered to interpret some features of the experimental spectra.