THE THREE DIMENSIONAL LASER INDUCED TEMPERATURE DISTRIBUTION IN PHOTOTHERMAL DISPLACEMENT SPECTROSCOPY

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SOLTAN ALKOTABI M.; NADERI M.H.

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Journal: Iranian Journal of Physics Research Year:2002 | Volume:3 | Issue:2 Page(s): 109-199

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Information Journal Paper

Title

THE THREE DIMENSIONAL LASER INDUCED TEMPERATURE DISTRIBUTION IN PHOTOTHERMAL DISPLACEMENT SPECTROSCOPY

Author(s)

SOLTAN ALKOTABI M. | NADERI M.H. | Issue Writer Certificate

Keywords

PHOTOTHERMAL SPECTROSCOPYQ4

PHOTOTHERMAL EFFECTQ4

PHOTOTHERMAL WAVEQ4

TEMPERATURE DISTRIBUTIONQ4

Abstract

In this paper we present a detailed theoretical treatment of the 3-D TEMPERATURE DISTRIBUTION induced by laser beam in photothermal displacement spectroscopy. We assume that a solid sample, which is deposited on-a substrate and is in contact with a fluid, is irradiated by an intensity modulated cw laser source. By using a technique based on Green's function and integral transformations we find the explicit expression for TEMPERATURE DISTRIBUTION function. This function which depends on the properties of the laser beam and optical and thermal properties of the sample, the substrate and the fluid, exhibits the characteristics of a damped thermal wave. Numerical analysis of the TEMPERATURE DISTRIBUTION for a certain sample (GaAs) reveals that the behavior of thermal wave is not so sensitive with respect to the variation of the modulation frequency. On the other hand; we find that the temperature of the sample surface decreases with increasing modulation frequency because of the thermal inertia of the sample. Furthermore, the effective thermal length decreases with increasing modulation frequency, thereby making the decay of photothermal signal faster.

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APA: Copy

SOLTAN ALKOTABI, M., & NADERI, M.H.. (2002). THE THREE DIMENSIONAL LASER INDUCED TEMPERATURE DISTRIBUTION IN PHOTOTHERMAL DISPLACEMENT SPECTROSCOPY. IRANIAN JOURNAL OF PHYSICS RESEARCH, 3(2), 109-199. SID. https://sid.ir/paper/1756/en

Vancouver: Copy

SOLTAN ALKOTABI M., NADERI M.H.. THE THREE DIMENSIONAL LASER INDUCED TEMPERATURE DISTRIBUTION IN PHOTOTHERMAL DISPLACEMENT SPECTROSCOPY. IRANIAN JOURNAL OF PHYSICS RESEARCH[Internet]. 2002;3(2):109-199. Available from: https://sid.ir/paper/1756/en

IEEE: Copy

M. SOLTAN ALKOTABI, and M.H. NADERI, “THE THREE DIMENSIONAL LASER INDUCED TEMPERATURE DISTRIBUTION IN PHOTOTHERMAL DISPLACEMENT SPECTROSCOPY,” IRANIAN JOURNAL OF PHYSICS RESEARCH, vol. 3, no. 2, pp. 109–199, 2002, [Online]. Available: https://sid.ir/paper/1756/en

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