Dispersion of the Refractive Indices and Birefringence of CdS_xSe_1−x Single Crystals

Abstract

The spectral dependence of the refractive indices and birefringence of CdSxSe1−x (including CdS and CdSe) single crystals has been investigated from the fundamental absorption edge up to the lattice vibration spectrum in the temperature interval 100 to 600 °K. In the region of v > 5000 cm−1 the measurements are carried out by the method of prism (with an absolute error for n of 5 × 10−4), for v < 5000 cm−1 by the modified interference method (with an absolute error for n of 5 × 10−3, and for Δn = ne − no of (2 to 4) × 10−5). The results are discussed.

Third-Order Optical Nonlinearities in Thin Films of CdS Nanocrystals

“…where dn/dT is the thermo-optical coefficient (for CdS dn/dT = 2.4 Â 10 À4 K À1 [8]) and the temperature increase because of irradiation is…”

Disorder effects on free excitons in CdS1−xSex mixed crystals

“…Using a suitable set of basis functions for the band state part of the exciton functions (see [19]) the Hamiltonian (10) with (6) and (12) leads to 3 x 3 secular equations which are solved for given 611, I by a computer. The A, B, and C exciton energies and optical transition probabilities obtained for a certain exciton volume then are averaged over the crystal using the distribution functions (13) to yield the experimentally observable values. Explicit expressions can be obtained for the averaged exciton energies using series expansions up to the second order given in…”

Ab initio study of the linear and nonlinear optical properties of hexagonal CdSe

“…5. Since nonlinear frequency conversion is one of its applications, some experiments [35,36] have been performed to measure its refractive indexes in the infrared region. Unfortunately, our calculated results of refractive indexes are larger than the experimental value, while the birefringence is smaller in the near infrared zone.…”