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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 27 — Dec. 17, 2012
  • pp: 28829–28838

Thermoreflectance of metal transducers for optical pump-probe studies of thermal properties

R. B. Wilson, Brent A. Apgar, Lane W. Martin, and David G. Cahill  »View Author Affiliations


Optics Express, Vol. 20, Issue 27, pp. 28829-28838 (2012)
http://dx.doi.org/10.1364/OE.20.028829


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Abstract

We report measurements of the temperature dependence of the optical reflectivity, dR/dT of fifteen metallic elements at a wavelength of λ = 1.03 μm by time-domain thermoreflectance (TDTR); and the thermoreflectance of thin-films of Pt, Ta, Al, Au, SrRuO3, and LaNiO3 over the wavelength range 0.4 < λ < 1.6 μm using variable angle spectroscopic ellipsometry. At λ = 1.03 μm, Al, Ta, Re, Ru, have high values of thermoreflectance, dR/dT > 6∙10−5 K−1, and are good choices as optical transducers for TDTR experiments using a Yb:fiber laser oscillator. If low optical reflectivity and the associated high degree of steady-state heating are not a concern, LaNiO3 provides an exceptionally sensitive thermometer in the infrared; (1/R)(dR/dT) > 2.5∙10−4 K−1 in the wavelength range 0.85 < λ < 1.3 μm. This compilation of data will assist in the design and interpretation of optical pump-probe studies of thermal properties.

© 2012 OSA

OCIS Codes
(110.6820) Imaging systems : Thermal imaging
(160.3900) Materials : Metals
(320.7100) Ultrafast optics : Ultrafast measurements
(350.5340) Other areas of optics : Photothermal effects

ToC Category:
Materials

History
Original Manuscript: September 18, 2012
Revised Manuscript: November 1, 2012
Manuscript Accepted: November 29, 2012
Published: December 12, 2012

Citation
R. B. Wilson, Brent A. Apgar, Lane W. Martin, and David G. Cahill, "Thermoreflectance of metal transducers for optical pump-probe studies of thermal properties," Opt. Express 20, 28829-28838 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-27-28829


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