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Nano-ablation of silica by plasmonic surface wave at low fluence

Lei Wang, Xiao-Wen Cao, Muhammad Irfan Abid, Qian-Kun Li, Wen-Jing Tian, Qi-Dai Chen, Saulius Juodkazis, and Hong-Bo Sun

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Abstract

Formation of ripples by ablation of surfaces of laser-irradiated materials is an example of ultrafast energy delivery. Herein, we report on fs-laser optical imprinting of periodic nano-grooves on silica substrate at only 25% of the laser ablation threshold via an interface plasmonic light localization at the ZnS film (top) interface with silica (bottom) by plasmonic surface wave. The nano-grooves were formed throughout ZnS with the same period and orientation imprinted onto the underlying silica. Based on a detailed account of the multi-photon and avalanche ionization using the Drude model, laser-induced plasmonic ablation describes quantitatively the energy deposition from the top ZnS to the substrate of silica.

© 2017 Optical Society of America

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Supplementary Material (1)

NameDescription
Visualization 1       The instant changing of light intensity as time increasing after light irradiation.

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