Heat flow in substrates induced by a scanning laser beam

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

A general model is derived for computing the heat flow induced by a scanning continuous-wave laser beam with a Gaussian intensity distribution in a semi-infinite substrate. Temperature-dependent thermal conductivity, thermal diffusivity, and surface reflectivity are incorporated in the model. The model is then applied to different substrate materials such as silicon, GaAs, and Mn-Zn ferrite. The numerical results show that the heat flow intensity in the substrate depends on the incident laser power, substrate temperature, scan speed, and beam radius. This study is expected to be useful in investigating the distributions of the laser-induced thermal stresses and lattice damages.

Original languageEnglish (US)
Pages (from-to)3701-3712
Number of pages12
JournalJournal of Applied Physics
Volume71
Issue number8
DOIs
StatePublished - Dec 1 1992

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heat transmission
laser beams
scanning
continuous wave lasers
thermal diffusivity
thermal stresses
lasers
ferrites
thermal conductivity
damage
reflectance
radii
temperature
silicon

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Heat flow in substrates induced by a scanning laser beam. / Lu, Yong Feng.

In: Journal of Applied Physics, Vol. 71, No. 8, 01.12.1992, p. 3701-3712.

Research output: Contribution to journalArticle

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