Density-dependent carrier-envelope phase shift in attosecond pulse generation from relativistically oscillating mirrors  

作　　者：Rishat Zagidullin Stefan Tietze Matt Zepf Jingwei Wang Sergey Rykovanov 

机构地区：[1]Center for AI Technologies,Skolkovo Institute of Science and Technology,Moscow,Russia [2]Helmholtz-Institute Jena,Fröbelstieg 3,07743 Jena,Germany [3]Friedrich-Schiller-Universität Jena,Physikalisch-Astronomische Fakultät,Max-Wien-Platz 1,07743 Jena,Germany [4]State Key Laboratory of High Field Laser Physics and Chinese Academy of Sciences Center for Excellence in Ultra-Intense Laser,Science,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China

出　　处：《Matter and Radiation at Extremes》2023年第6期41-48,共8页极端条件下的物质与辐射（英文）

基　　金：This work was supported by the Russian Science Foundation(Grant No.22-22-01031).

摘　　要：The carrier-envelope phase(CEP)φ_(0)is one of the key parameters in the generation of isolated attosecond pulses.In particular,“cosine”pulses(φ_(0)=0)are best suited for generation of single attosecond pulses in atomic media.Such“cosine”pulses have the peak of the most intense cycle aligned with the peak of the pulse envelope,and therefore have the highest contrast between the peak intensity and the neighboring cycles.In this paper,the dynamics of single attosecond pulse generation from a relativistically oscillating plasma mirror is investigated.We use an elementary analytical model as well as particle-in-cell simulations to study few-cycle attosecond pulses.We find that the phase of the field driving the surface oscillations depends on the plasma density and preplasma scale length.This leads us to a counterintuitive conclusion:for the case of normal incidence and a sharp plasma-vacuum boundary,the CEP required for the generation of a single attosecond pulse phase is closer toφ_(0)=π/2(a“sine”pulse),with the exact value depending on the plasma parameters.

关 键 词：ENVELOPE OSCILLATING RELATIVISTIC 

分 类 号：O43[机械工程—光学工程]