
High-harmonic generation from a flat liquid-sheet plasma mirror
2023年4月22日 · We demonstrated HHG from the liquid plasma mirror in the ROM regime using a 150-TW-laser with a pulse energy of 5J.
高次谐波产生(High Harmonic Generation) - 知乎 - 知乎专栏
摘要: 高次谐波产生 是一种极端的非线性效应,强场激光聚焦到气体介质上的时候,会发生非线性效应,可以得到上百阶的高能谐波光子。 作为一种相干的宽谱高能光源,它可以用来产生 阿秒脉冲 ( 10^ {-18}s ),同时,它也可以在百电子伏附近及以下的波段部分代替 同步辐射光源,甚至在一定程度上优于同步辐射光源。 高次谐波其实很简单,如图1所示,把飞秒激光聚焦到气体源中,就可以产生高能光子。 产生高次谐波需要的场强需要达到 10^ {14} W/cm^2 量级,其实相 …
Bright high-order harmonic generation with controllable polarization ...
2016年8月17日 · In this paper, we propose and numerically demonstrate the generation of intense HHG with fully controlled polarization from laser plasmas. We show that this can be achieved using a CP laser...
High-order-harmonic generation in atomic and molecular systems
2017年3月16日 · High-order-harmonic generation (HHG) results from the interaction of ultrashort laser pulses with matter. It configures an invaluable tool to produce attosecond pulses, moreover, to extract electron structural and dynamical information of …
We introduce two-color counterrotating circularly polarized laser fields as a new way to spectrally control high harmonic generation (HHG) from relativistic plasma mirrors.
Relativistic short-pulse high harmonic generation at 1.3 and 2.1
2019年4月30日 · Two distinct mechanisms of short-pulse laser-solid HHG in reflection geometries have been investigated: the relativistic oscillating mirror (ROM) and coherent wake emission (CWE). ROM HHG occurs when the critical density surface electrons are driven to relativistic speeds by the intense laser field.
In this paper, we propose and numerically demonstrate the generation of intense HHG with fully controlled polarization from laser plasmas. We show that this can be achieved using a CP laser obliquely incident onto a plasma surface. Both pulses trains and isolated circular or highly elliptic attosecond XUV pulses can be obtained.
固态高次谐波产生中的超快退相:实空间动力学揭示的宏观起源[邀 …
在光学领域,高次谐波产生(High Harmonic Generation, HHG)是一个重要的研究方向,尤其在固体材料中的应用引起了广泛关注。 然而,固体HHG的理论模拟中经常使用的极短去相位时间与实验结果之间存在差异,这一问题长期困扰着研究者。
为简单正/ 余弦波(即简谐波)的确很“和谐”。因为简谐运动(simple harmonic motion)是最简单、最基本的周期运动,它在形式上非常的简单、规则:所受回复力始终保�. 大小与位移大小成线性正比关系、方向相反。画出位置随时间变化的曲线即为简单优美的正/余弦曲线,而在位置与速度组成的相空间中则表. 有谐波这个词,可能是与听感的优美和谐有关。人们把发音物体有规�. 地振动而产生的具有固定音高的音称为乐音。 般乐器发出的音都不是�. 频率的音,而是�. 率为基音整数倍的音 …
(PDF) Relativistic short-pulse high harmonic generation at 1.3 and …
2019年4月1日 · There are three main distinguishing features between CWE and ROM HHG. First, CWE has only been detected in p -polarized geometries, therefore detection of the 4th and higher harmonics from an s...