Laser Raman measurements of dielectric coatings as a function of temperature

Gregory J. Exarhos; Nancy J. Hess; Samantha Ryan

doi:10.1117/12.27529

1 June 1991 Laser Raman measurements of dielectric coatings as a function of temperature

Gregory J. Exarhos, Nancy J. Hess, Samantha Ryan

Proceedings Volume 1441, Laser-Induced Damage in Optical Materials: 1990; (1991) https://doi.org/10.1117/12.27529
Event: Laser-Induced Damage in Optical Materials: 1990, 1990, Boulder, CO, United States

Abstract

Single crystal Raman spectra of the anatase phase of titania have been acquired as a simultaneous function of temperature and pressure in a heated diamond anvil cell. Measured data are used to construct frequency contours in P space for particular allowed vibrational modes. The magnitude of stress in thin films deposited on various substrates and its temperature evolution have been evaluated from correlations between the P frequency maps and measured temperature-dependent mode frequencies exhibited by the films. A simple anharmonic oscillator model has been used to relate the temperature-dependence of the square of the mode frequency to the first order aiiharmonic contribution to the potential energy from which the thermal expansion coefficient (a) of polycrystalline films may be estimated. The stress dependence of a for bulk titania has been determined from this data and is compared with the predicted response of several stressed titania films. 1.

Citation Download Citation

Gregory J. Exarhos, Nancy J. Hess, and Samantha Ryan "Laser Raman measurements of dielectric coatings as a function of temperature", Proc. SPIE 1441, Laser-Induced Damage in Optical Materials: 1990, (1 June 1991); https://doi.org/10.1117/12.27529

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available