Transverse photothermal beam deflection within a solid

Journal Article · Mon Jul 15 04:00:00 EDT 1991 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.349659· OSTI ID:5555201

Spear, J D; Russo, R E ^[1]

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1. Applied Science Division, Lawrence Berkeley Laboratory, Berkeley, California 94720 (US)

The mirage effect within a transparent solid substrate was used for monitoring optical absorption of a thin film. Refractive index gradients, which accompany thermal gradients below the film-coated surface, cause a probe laser beam to be deflected. The spectrum of copper, deposited onto a piece of clear acrylic, was recorded by this method of photothermal deflection. The influence of thermally induced mechanical stresses can alter the effective value of the thermo-optic coefficient of the solid, {ital dn}/{ital dT}.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5555201
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 70:2; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ABSORPTION SPECTRA
COPPER
ELECTROMAGNETIC RADIATION
ELEMENTS
ESTERS
FILMS
LASER RADIATION
METALS
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PHYSICAL PROPERTIES
POLYACRYLATES
POLYMERS
POLYVINYLS
RADIATIONS
REFRACTIVITY
SPECTRA
STRESSES
SUBSTRATES
TEMPERATURE GRADIENTS
THIN FILMS
TRANSITION ELEMENTS