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Formation of in-volume nanogratings with sub-100 nm periods in glass by femtosecond laser irradiation (1506.00763v1)

Published 2 Jun 2015 in physics.optics

Abstract: We present direct experimental observation of the morphological evolution during the formation of nanogratings with sub-100-nm periods with the increasing number of pulses. Theoretical simulation shows that the constructive interference of the scattering light from original nanoplanes will create an intensity maximum located between the two adjacent nanoplanes, resulting in shortening of the nanograting period by half. The proposed mechanism enables explaining the formation of nanogratings with periods beyond that predicted by the nanoplasmonic model.

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