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Photothermal deflection studies on heat transport in intrinsic and extrinsic InP

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Abstract

Laser induced transverse photothermal deflection technique has been employed to determine the thermal parameters of InP doped with Sn, S and Fe as well as intrinsic InP. The thermal diffusivity values of these various samples are evaluated from the slope of the curve plotted between the phase of photothermal deflection signal and pump-probe offset. Analysis of the data shows that heat transport and hence the thermal diffusivity value, is greatly affected by the introduction of dopant. It is also seen that the direction of heat flow with respect to the plane of cleavage of semiconductor wafers influences the thermal diffusivity value. The results are explained in terms of dominating phonon assisted heat transfer mechanism in semiconductors .

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Authors and Affiliations

  1. International School of Photonics, Cochin University of Science and Technology, 682 022, Kochi , India

    S.D. George, P. Radhakrishnan, V.P.N. Nampoori & C.P.G. Vallabhan

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  1. S.D. George
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  2. P. Radhakrishnan
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  3. V.P.N. Nampoori
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  4. C.P.G. Vallabhan
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Correspondence to S.D. George.

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PACS

78.20.Nv; 66.30.Xj; 61.72.Vv

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George, S., Radhakrishnan, P., Nampoori, V. et al. Photothermal deflection studies on heat transport in intrinsic and extrinsic InP. Appl. Phys. B 77, 633–637 (2003). https://doi.org/10.1007/s00340-003-1272-x

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  • DOI: https://doi.org/10.1007/s00340-003-1272-x

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