1 July 1990 Fast time-resolved surface temperature measurements by electronic resonant second harmonic generation
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Abstract
A nonlinear optical technique based on second harmonic generation (SHG) is introduced to probe the transient temperature jump induced by pulsed laser excitation of a metal surface. This technique is surface sensitive, nonintrusive and has time resolution limited only by the probe laser pulsewidth. For the Ag(1 10) surface, a strong temperature dependence of SHG enhanced by interband transitions is observed, and is used to detect a > 1010 K/sec heating rate induced by a nanosecond IR excitation pulse. A much stronger temperature dependence is also observed in the SHG resonantly enhanced by a surface state transition on Ag(110) and can in principle be used for surface temperature measurements. This kind of surface temperature measurement method can be generally applied to metals, semiconductors and solids that have temperature dependent electronic transitions.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Janice M. Hicks, Lynn E. Urbach, E. Ward Plummer, Hai-Lung Dai, "Fast time-resolved surface temperature measurements by electronic resonant second harmonic generation", Proc. SPIE 1208, Laser Photoionization and Desorption Surface Analysis Techniques, (1 July 1990); doi: 10.1117/12.17878; https://doi.org/10.1117/12.17878
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