Time-resolved conductance and reflectance measurements of silicon during pulsed-laser annealing

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Abstract

The dynamics of silicon solidification from the melt during pulsed-ruby-laser annealing have been investigated with the use of time-resolved electrical-conductance and optical-reflectance measurements. Melt duration was found to increase with laser-energy density to over 450 nsec at the highest energy used (3.1 J/cm2). Resolidification velocity was found to vary with time and laser-energy density over a range of 2 to 3 m/sec. The melt threshold was observed to be 0.8 J/cm2. Measurements of the laser energy absorbed in the sample were made to determine energy coupling parameters for use in numerical calculations. The numerical calculations, based on a thermal model for laser melting, are found to be in good agreement with the experimental results.

Original languageEnglish
Pages (from-to)1079-1087
Number of pages9
JournalPhysical Review B
Volume27
Issue number2
DOIs
StatePublished - 1983
Externally publishedYes

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