Optical probing of ultrafast laser-induced solid-to-overdense-plasma transitions  

作　　者：Yasmina Azamoum Georg Alexander Becker Sebastian Keppler Guillaume Duchateau Stefan Skupin Mickael Grech Fabrice Catoire Sebastian Hell Issa Tamer Marco Hornung Marco Hellwing Alexander Kessler Franck Schorcht Malte Christoph Kaluza 

机构地区：[1]GSI Helmholtzzentrum für Schwerionenforschung,Planckstr.1,64291 Darmstadt,Germany. [2]Helmholtz Institute Jena,Fröbelstieg 3,07743 Jena,Germany. [3]Institute of Optics and Quantum Electronics,Friedrich-SchillerUniversität Jena,Max-Wien-Platz 1,07743 Jena,Germany. [4]CEA-CESTA,15 Avenue des Sablières,CS60001,33116 Le Barp,Cedex,France [5]Institut Lumière Matière,UMR 5306-CNRS,Universitéde Lyon 1,69622 Villeurbanne,France. [6]LULI,CNRS,CEA,Sorbonne Université,Institut Polytechnique de Paris,Palaiseau,France. [7]Universitéde Bordeaux-CNRS-CEA,CELIA,UMR 5107 Talence,France

出　　处：《Light(Science & Applications)》2024年第5期973-984,共12页光（科学与应用)（英文版）

基　　金：LASERLABEUROPE(Grant agreement nos.871124,European Union’s Horizon 2020 research and innovation program)and from the Bundesministerium für Bildung und Forschung(BMBF,Grant Agreements No.03VNE2068D,No.03Z1H531,No.05K19SJB,No.05K19SJC,No.05K22SJA,and No.05K22SJB).

摘　　要：Understanding the solid target dynamics resulting from the interaction with an ultrashort laser pulse is a challenging fundamental multi-physics problem involving atomic and solid-state physics,plasma physics,and laser physics.Knowledge of the initial interplay of the underlying processes is essential to many applications ranging from lowpower laser regimes like laser-induced ablation to high-power laser regimes like laser-driven ion acceleration.Accessing the properties of the so-called pre-plasma formed as the laser pulse’s rising edge ionizes the target is complicated from the theoretical and experimental point of view,and many aspects of this laser-induced transition from solid to overdense plasma over picosecond timescales are still open questions.On the one hand,laser-driven ion acceleration requires precise control of the pre-plasma because the efficiency of the acceleration process crucially depends on the target properties at the arrival of the relativistic intensity peak of the pulse.On the other hand,efficient laser ablation requires,for example,preventing the so-called“plasma shielding”.By capturing the dynamics of the initial stage of the interaction,we report on a detailed visualization of the pre-plasma formation and evolution.Nanometer-thin diamond-like carbon foils are shown to transition from solid to plasma during the laser rising edge with intensities<10^(16)W/cm^(2).Single-shot near-infrared probe transmission measurements evidence sub-picosecond dynamics of an expanding plasma with densities above 10^(23)cm^(−3)(about 100 times the critical plasma density).The complementarity of a solid-state interaction model and kinetic plasma description provides deep insight into the interplay of initial ionization,collisions,and expansion.

关 键 词：laser acceleration solid 

分 类 号：TN24[电子电信—物理电子学] O43[机械工程—光学工程]