Response of interferometer based probe systems to photodisplacement in layered media

M. Liu, M. B. Suddendorf, Michael Geoffrey Somekh

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)


This paper presents a detailed theory which describes the response of a focused interferometer when a modulated laser source is incident upon a layered sample. In order to solve this problem it is necessary to solve the thermoelastic equations for a layered sample. The paper presents an analytical solution obtained using a symbolic manipulation program (reduce). In particular, we point out that the analytical form of the solution is necessary to achieve numerically stable results. In addition to calculating the actual displacement of the sample surface, the response of the instrument is considered in detail, in terms of the refractive index changes of the air above the sample and the optical transfer function of the probe optics.
Original languageEnglish
Pages (from-to)207-215
Number of pages9
JournalJournal of Applied Physics
Issue number1
Publication statusPublished - 1 Dec 1994
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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