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Type: 
Journal
Description: 
Relativistic laser interaction with micro-and nano-scale surface structures enhances energy transfer to solid targets and yields matter in extreme conditions. We report on the comparative study of laser-target interaction mechanisms with wire-structures of different size, revealing a transition from a coherent particle heating to a stochastic plasma heating regime which occurs when migrating from micro-scale to nano-scale wires. Experiments and kinetic simulations show that large gaps between the wires favour the generation of high-energy electrons via laser acceleration into the channels while gaps smaller than the amplitude of electron quivering in the laser field lead to less energetic electrons and multi-keV plasma generation, in agreement with previously published experiments. Plasma filling of nano-sized gaps due to picosecond pedestal typical of ultrashort pulses strongly affects the interaction with this class of …
Publisher: 
Springer Nature
Publication date: 
3 May 2017
Authors: 

G. Cristoforetti, P. Londrillo, P. K. Singh, F. Baffigi, G. D’Arrigo, Amit D. Lad, R. G. Milazzo, A. Adak, M. Shaikh, D. Sarkar, G. Chatterjee, J. Jha, M. Krishnamurthy, G. R. Kumar, L. A. Gizzi

Biblio References: 
Volume: 7 Issue: 1479
Origin: 
Scientific Reports