Intense Mid-Infrared Laser Pulse Generated via Flying-Mirror Red-Shifting in Near-Critical-Density Plasmas  

作　　者：鲁瑜 李东澳 李倩妮 邵福球 余同普 Yu Lu;Dong-Ao Li;Qian-Ni Li;Fu-Qiu Shao;Tong-Pu Yu(Department of Physics,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]Department of Physics,National University of Defense Technology,Changsha 410073,China

出　　处：《Chinese Physics Letters》2024年第2期42-46,共5页中国物理快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12375244,12135009,and 12275356);the Hunan Provincial Innovation Foun-dation for Postgraduate(Grant Nos.CX20210062 and CX20230006).

摘　　要：Relativistic femtosecond mid-infrared pulses can be generated efficiently by laser interaction with near-criticaldensity plasmas.It is found theoretically and numerically that the radiation pressure of a circularly polarized laser pulse first compresses the plasma electrons to form a dense flying mirror with a relativistic high speed.The pulse reflected by the mirror is red-shifted to the mid-infrared range.Full three-dimensional simulations demonstrate that the central wavelength of the mid-infrared pulse is tunable from 3µm to 14µm,and the laser energy conversion efficiency can reach as high as 13%.With a 0.5–10 PW incident laser pulse,the generated mid-infrared pulse reaches a peak power of 10–180 TW,which is interesting for various applications in ultrafast and high-field sciences.

关 键 词：MIRROR Infrared Pulse 

分 类 号：O53[理学—等离子体物理] TN249[理学—物理]