Square-shaped temperature distribution induced by a Gaussian-shaped laser beam

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

A method is proposed to generate a square-shaped temperature distribution in substrates from a Gaussian-shaped laser source by transferring the Gaussian distribution of the laser beam into four one-quarter Gaussian-distributed beams. A mathematical model was derived to calculate the temperature rise induced by both the one-quarter Gaussian beam and four one-quarter Gaussian beams. The model was then applied to a silicon substrate. It is revealed that square-shaped temperature distributions can be obtained by this method if the distance between the peaks of the four one-quarter beams is arranged to be the same as the spot size of the original Gaussian beam. It is also found that the square shape of the temperature profile is almost of the same size as the original Gaussian beam and does not depend on the incident laser power (or the absolute temperature rise) and the substrate material.

Original languageEnglish (US)
Pages (from-to)357-364
Number of pages8
JournalApplied Surface Science
Volume81
Issue number3
DOIs
StatePublished - Nov 1994

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Gaussian beams
Laser beams
Temperature distribution
temperature distribution
laser beams
Substrates
Lasers
Gaussian distribution
Silicon
Temperature
Light sources
Mathematical models
normal density functions
temperature profiles
lasers
mathematical models
temperature
silicon

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Cite this

Square-shaped temperature distribution induced by a Gaussian-shaped laser beam. / Lu, Yong Feng.

In: Applied Surface Science, Vol. 81, No. 3, 11.1994, p. 357-364.

Research output: Contribution to journalArticle

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