Thermal characterisation of doped InP using photoacoustic technique

Sajan D. George, Achamma Kurian, Martin Lase, V. P.N. Nampoori, C. P.G. Vallabhan

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Abstract

An open cell photoacoustic configuration has been employed to evaluate the thermal diffusivity of pure InP as well as InP doped with suplhur and iron. Chopped optical radiation at 488 nm from an Ar-ion laser has been used to excite photoacoustic signals which been detected by a sensitive electret microphone. Thermal diffusivity value have been calculated from phase versus chopping frequency plots. Doped sample are found to show a reduced value for thermal diffusivity in comparison with intrinsically pure sample. The results have been interpreted in terms of the mechanisms of heat generation and transmission in semiconductors.

Original languageEnglish
Pages (from-to)183-191
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4595
DOIs
Publication statusPublished - 01-12-2001

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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