Abstract
Based on rigorous electromagnetic wave theory, a theoretical analysis is presented to study the laser beam reflected and diffracted from the metallic grating, which is excited in the surface plane by interference of two pulsed laser beams. Numerica l results show that, at some distinct incidence angles surface plasmon resonance occurs and the intensity change of reflected lig ht is about 50 times larger than that of diffracted laser beam under normal incidence. This suggests a sensitive method for detect ing transient reflecting gratings, especially in real time measurements.
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