Continuous Laser‐Excited Photothermal Spectrometry of CdS_xSe_1‐x Doped Glasses

Authors

Oluwatosin Dada
Matthew R. Jorgensen
Stephen E. Bialkowski, Utah State UniversityFollow

Document Type

Article

Journal/Book Title

Applied Spectroscopy

Publication Date

2007

Volume

61

First Page

1373

Last Page

1378

Abstract

Photothermal lens measurements and finite element modeling are used to examine the physical changes taking place in optical filter glasses. Colored glass and neutral density filters are found to have a strong positive temperature-dependent refractive index change. The overall positive refractive index change is thought to be a consequence of complex counteracting factors: stress-induced birefringence, polarizability, structural network, and temperature-dependent carrier density changes in the CdS_xSe_1-x microcrystals that produce optical properties of these glasses. Finite element analysis (FEA) modeling is used to examine the temperature profiles and the goodness of the semi-infinite thermal diffusion solution normally used for thermal lens experiments. The results of FEA were used to optimize experimental parameters and calculate values of dn/dT for the glass by comparison with standard liquid samples.

Recommended Citation

Continuous Laser‐Excited Photothermal Spectrometry of CdSxSe1‐x Doped Glasses Oluwatosin Dada, Matthew R. Jorgensen, Stephen E. Bialkowski Applied Spectroscopy 61 1373‐1378 2007