Applied Physics A

, Volume 32, Issue 3, pp 141–154

Photothermal displacement spectroscopy: An optical probe for solids and surfaces

  • M. A. Olmstead
  • N. M. Amer
  • S. Kohn
  • D. Fournier
  • A. C. Boccara
Contributed Papers

Abstract

We present a sensitive technique for determining the optical and thermal properties of solids, surfaces and thin films. This technique, photothermal displacement Spectroscopy, is based on the detection of the thermal expansion of a sample upon absorption of electromagnetic radiation. The technique is well suited for in situ ultrahigh vacuum studies and for experiments where wide temperature ranges are required. We show that surface and bulk optical absorption can be distinguished and that surface absorptions of αL=10−6/W of incident power can be measured. The theoretical basis of the signal generation is given, and excellent experimental and theoretical agreement is demonstrated. The implications of our findings to imaging and microscopy are discussed.

PACS

73 78 65 

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Copyright information

© Springer-Verlag 1983

Authors and Affiliations

  • M. A. Olmstead
    • 1
  • N. M. Amer
    • 1
  • S. Kohn
    • 1
  • D. Fournier
    • 2
  • A. C. Boccara
    • 2
  1. 1.Applied Physics and Laser Spectroscopy Group, Lawrence Berkeley LaboratoryUniversity of CaliforniaBerkeleyUSA
  2. 2.Laboratoire d'Optique PhysiqueEcole Supérieure de Physique et de ChimieParis CedexFrance
  3. 3.Aerospace CorporationLos AngelesUSA

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