Photoacoustic investigation of doped InP using open cell configuration

Sajan D. George, C. P G Vallabhan, M. Heck, P. Radhakrishnan, V. P N Nampoori

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


An open cell photoacoustic (PA) configuration has been employed to evaluate the thermal diffusivity of intrinsic InP as well as InP doped with tin and iron. Thermal diffusivity data have been evaluated from variation of phase of PA signal as a function of modulation frequency. In doped samples, we observe a reduced value for thermal diffusivity in comparison with intrinsic InP. We also observed that, while the phase of the PA signal varies linearly with the square root of chopping frequency for doped samples, the intrinsic material does not exhibit such behaviour in the experimental frequency range. These results have been interpreted in terms of the heat generation and phonon assisted heat diffusion mechanisms in semiconductors.

Original languageEnglish
Pages (from-to)75-82
Number of pages8
JournalNondestructive Testing and Evaluation
Issue number2
Publication statusPublished - 01-01-2002

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials


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