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Phase-locked laser arrays have been extensively investigated in terms of their stability and nonlinear dynamics. Specifically, enhancing the phase-locking stability allows laser arrays to generate high-power and steerable coherent optical…

Optics · Physics 2021-06-24 Sizhu Jiang , Suruj S. Deka , Si Hui Pan , Yeshaiahu Fainman

We study the perspectives of measuring the phenomenon of vacuum birefringence predicted by quantum electrodynamics using an x-ray free-electron laser (XFEL) alone. We devise an experimental scheme allowing the XFEL beam to collide with…

High Energy Physics - Phenomenology · Physics 2021-09-02 Felix Karbstein , Chantal Sundqvist , Kai S. Schulze , Ingo Uschmann , Holger Gies , Gerhard G. Paulus

We demonstrate analytically and numerically that focusing of high harmonics produced by the reflection of a few femtosecond laser pulse from a concave plasma surface opens a new way towards unprecedentally high intensities. The key features…

Optics · Physics 2007-05-23 S. Gordienko , A. Pukhov , O. Shorokhov , T. Baeva

The evolution from 3rd to 4th generation synchrotron radiation (SR) sources significantly enhanced their coherence, making coherent scattering techniques such as coherent X-ray diffraction imaging (CXDI) and X-ray photon correlation…

Accelerator Physics · Physics 2021-10-20 Han Xu , Zhongzhu Zhu , Peng Liu , Yuhui Dong , Liang Zhou

Various scientific and industrial researches such as spectroscopy and advanced nano-technologies have been demanding high flux and fully coherent EUV and X-ray radiation. These demands can be commendably satisfied with a MHz-level…

Accelerator Physics · Physics 2024-04-29 Xiaofan Wang , Chao Feng , Bart Faatz , Weiqing Zhang , Zhentang Zhao

X-ray free-electron lasers (XFELs) of high brightness have opened new opportunities for exploring ultrafast dynamical processes in matter, enabling imaging and movies of single molecules and particles at atomic resolution. In this paper, we…

Intrinsic spectrum that results from the coupling of spontaneous emission in a laser cavity, can determine the energy concentration and coherence of lasers, which is crucial for the optical high-precision measurement. Up to now, it is hard…

Ionization of atoms and molecules in laser fields can lead to various interesting interference structures in the photoelectron spectrum. For the case of a super-intense extreme ultraviolet laser pulse, we identify a novel petal-like…

Atomic Physics · Physics 2022-03-29 Lei Geng , Hao Liang , K. Krajewska , Liang-You Peng , Qihuang Gong

A theoretical investigation on the quantum control of optical coherent four-wave mixing interactions in two-level systems driven by two intense synchronized femtosecond laser pulses of central angular frequencies $\omega$ and $3\omega$ is…

Optics · Physics 2009-11-10 Carles Serrat

X-ray Free Electron Lasers (XFELs) have been proven to generate short and powerful radiation pulses allowing for a wide class of novel experiments. If an XFEL facility supports the generation of two X-ray pulses with different wavelengths…

Accelerator Physics · Physics 2017-06-05 Gianluca Geloni , Vitali Kocharyan , Tommaso Mazza , Michael Meyer , Evgeni Saldin , Svitozar Serkez

We investigate theoretically the quantum-coherence properties of the cathodoluminescence (CL) emission produced by a temporally modulated electron beam. Specifically, we consider the quantum-optical correlations of CL from electrons that…

Quantum Physics · Physics 2020-11-12 Ofer Kfir , Valerio Di Giulio , F. Javier García de Abajo , Claus Ropers

The random laser action with coherent feedback by second-harmonic generation (SHG) was experimentally demonstrated in this paper. Compared with the conventional random laser action based on photoluminescence effect, which needs strong…

Optics · Physics 2016-11-24 Yanqi Qiao , Yuanlin Zheng , Zengyan Cai , Xianfeng Chen

When a high-contrast ultra-relativistic laser beam enters a micro-sized plasma waveguide, the pulse energy is coupled into waveguide modes, which remarkably modifies the interaction of electrons and electromagnetic wave. The electrons that…

Plasma Physics · Physics 2016-08-03 Longqing Yi , Alexander Pukhov , Baifei Shen

A detailed study of the effects of phase fluctuation and dephasing on the dynamics of the entanglement generated from a coherently pumped correlated emission laser is presented. It is found that the time evolution of the entanglement is…

Quantum Physics · Physics 2015-05-27 Sintayehu tesfa

The single-pulse spectrum of self-amplified spontaneous emission (SASE) free electron lasers (FELs) is characterized by random fluctuations in frequency. The typical spectrum bandwidth for a hard x-ray FEL is in the range of 10-20 eV and is…

Accelerator Physics · Physics 2016-12-08 Gennady Stupakov , Max Zolotorev

We describe a scheme for generation of coherent $\gamma$-rays by backscattering intense visible laser light from a beam of partially stripped ions. The scheme is similar in principle to the proposed Gamma Factory at CERN, with the important…

Accelerator Physics · Physics 2026-05-11 Nicola Piovella , Gordon R. M Robb

We propose a coupled microdisk laser as a compact and tunable laser source for the generation of a coherent continuous wave THz radiation by photomixing. Using the Schr\"odinger-Bloch model including the nonlinear effect of active medium,…

Optics · Physics 2015-06-05 Jung-Wan Ryu , Jinhang Cho , Chil-Min Kim , Susumu Shinohara , Sang Wook Kim

X-ray vortices carrying tunable Orbital Angular Momentum (OAM) are an emerging tool for X-ray characterization technology. However, in contrast to the generation of vortex beams in the visible wavelength region, the generation of X-ray…

Accelerator Physics · Physics 2023-11-07 Nanshun Huang , Haixiao Deng

We present here an overview of Coherent X-ray Diffraction Imaging (CXDI) with its application to nanostructures. This imaging approach has become especially important recently due to advent of X-ray Free-Electron Lasers (XFEL) and its…

Mesoscale and Nanoscale Physics · Physics 2013-04-22 Ivan A. Vartanyants , Oleksandr M. Yefanov

High brightness and low coherence laser sources with wideband tunability are essential for many full-field imaging applications aiming for high contrast and speckle free performance. However, this combination of parameters is challenging to…

Optics · Physics 2026-05-12 Xinyang Liu , Matias Koivurova , Regina Gumenyuk
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