Exploring the multiparameter nature of EUV-visible wave mixing at the FERMI FEL.

IF 2.3 2区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Structural Dynamics-Us Pub Date : 2019-07-29 eCollection Date: 2019-07-01 DOI:10.1063/1.5111501

L Foglia, F Capotondi, H Höppner, A Gessini, L Giannessi, G Kurdi, I Lopez Quintas, C Masciovecchio, M Kiskinova, R Mincigrucci, D Naumenko, I P Nikolov, E Pedersoli, G M Rossi, A Simoncig, F Bencivenga

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引用次数: 3

Abstract

The rapid development of extreme ultraviolet (EUV) and x-ray ultrafast coherent light sources such as free electron lasers (FELs) has triggered the extension of wave-mixing techniques to short wavelengths. This class of experiments, based on the interaction of matter with multiple light pulses through the Nth order susceptibility, holds the promise of combining intrinsic ultrafast time resolution and background-free signal detection with nanometer spatial resolution and chemical specificity. A successful approach in this direction has been the combination of the unique characteristics of the seeded FEL FERMI with dedicated four-wave-mixing (FWM) setups, which leads to the demonstration of EUV-based transient grating (TG) spectroscopy. In this perspective paper, we discuss how the TG approach can be extended toward more general FWM spectroscopies by exploring the intrinsic multiparameter nature of nonlinear processes, which derives from the ability of controlling the properties of each field independently.

Abstract Image

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探索FERMI FEL中EUV可见波混合的多参数性质。

极紫外（EUV）和x射线超快相干光源（如自由电子激光器）的快速发展引发了波混频技术向短波长的扩展。这类实验基于物质与多个光脉冲通过N阶磁化率的相互作用，有望将固有的超快时间分辨率和无背景信号检测与纳米空间分辨率和化学特异性相结合。这方面的一个成功方法是将种子FEL FERMI的独特特性与专用的四波混频（FWM）装置相结合，从而展示了基于EUV的瞬态光栅（TG）光谱。在这篇前瞻性的论文中，我们讨论了如何通过探索非线性过程的内在多参数性质，将TG方法扩展到更通用的FWM光谱，这源于独立控制每个场的性质的能力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Structural Dynamics-Us CHEMISTRY, PHYSICALPHYSICS, ATOMIC, MOLECU-PHYSICS, ATOMIC, MOLECULAR & CHEMICAL

CiteScore

5.50

自引率

3.60%

发文量

审稿时长

16 weeks

期刊介绍： Structural Dynamics focuses on the recent developments in experimental and theoretical methods and techniques that allow a visualization of the electronic and geometric structural changes in real time of chemical, biological, and condensed-matter systems. The community of scientists and engineers working on structural dynamics in such diverse systems often use similar instrumentation and methods. The journal welcomes articles dealing with fundamental problems of electronic and structural dynamics that are tackled by new methods, such as: Time-resolved X-ray and electron diffraction and scattering, Coherent diffractive imaging, Time-resolved X-ray spectroscopies (absorption, emission, resonant inelastic scattering, etc.), Time-resolved electron energy loss spectroscopy (EELS) and electron microscopy, Time-resolved photoelectron spectroscopies (UPS, XPS, ARPES, etc.), Multidimensional spectroscopies in the infrared, the visible and the ultraviolet, Nonlinear spectroscopies in the VUV, the soft and the hard X-ray domains, Theory and computational methods and algorithms for the analysis and description of structuraldynamics and their associated experimental signals. These new methods are enabled by new instrumentation, such as: X-ray free electron lasers, which provide flux, coherence, and time resolution, New sources of ultrashort electron pulses, New sources of ultrashort vacuum ultraviolet (VUV) to hard X-ray pulses, such as high-harmonic generation (HHG) sources or plasma-based sources, New sources of ultrashort infrared and terahertz (THz) radiation, New detectors for X-rays and electrons, New sample handling and delivery schemes, New computational capabilities.