Andrew Chew

University of Central Florida

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Zenghu Chang

University of Ottawa

Yi Wu

University of Central Florida

Xiaoming Ren

Earthquake Planning and Protection Organization

Yanchun Yin

University of Central Florida

Jie Li

Chinese Academy of Sciences

Seunghwoi Han

Chonnam National University

Michael Chini

University of Central Florida

Nobuhisa Ishii

National Institutes for Quantum and Radiological Science and Technology

Jiro Itatani

The University of Tokyo

Teruto Kanai

The University of Tokyo

Cooperative Institutions

University of Central Florida

106

Lawrence Livermore National Laboratory

Laser Zentrum Hannover

Pacific Northwest National Laboratory

University of New Mexico

Chinese Academy of Sciences

Massachusetts Institute of Technology

Kansas State University

University of Michigan–Ann Arbor

National Institute of Standards and Technology

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Single-shot intense few-cycle pulse interaction with polycrystalline ZnSe

Optics Letters (2020)

Yingjie Chai Xiaoming Yu He Cheng Andrew Chew Zenghu Chang

The interaction of high-intensity few-cycle laser pulses with solids opens a new area of fundamental light-material interaction research. The applied research extends from extreme nonlinearity in solids to the next-generation high laser light damage resistance optical design. In this Letter, 11 fs infrared, carrier-envelope-phase (CEP) stable, two-cycle laser pulses were applied to investigate the process of laser-material interaction on the ZnSe surface. A systematic study of a few-cycle pulse laser-induced damage threshold on ZnSe was performed for a single-pulse regime (1-on-1). Laser damage morphologies were carefully characterized. Our experiment demonstrated the very beginning of laser-induced structures on the ZnSe surface by using the shortest infrared few-cycle laser pulse currently available with a stable CEP.

Carrier-envelope phase

10.1364/ol.391361

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Citations (1)

Attosecond transient absorption spectrum of argon at the L2,3 edge

Physical review. A/Physical review, A (2018)

Andrew Chew Nicolas Douguet Coleman Cariker Jie Li Eva Lindroth

Progress in high-harmonic generation has led to high-energy attosecond pulses with cutoff above the carbon $1s$ edge (283.8 eV). These pulses are essential to extend time-resolved spectroscopies to the water window in order to control electron dynamics in solvated organic species. Here we report a step towards this goal: the measurement, with subcycle time resolution, of the attosecond transient absorption spectrum of argon at the $2{p}^{\ensuremath{-}1} {L}_{2,3}$ edge ($\ensuremath{\sim}250$ eV) in the presence of a short-wave infrared control pulse. The measurements, supported by theoretical simulations, demonstrate the concurrent role of Auger decay and tunnel ionization in the driven evolution of inner-valence holes of polyelectronic atoms.

Attosecond

10.1103/physreva.97.031407

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Citations (42)

Towards a High-Energy Sub-Cycle 4-12 µm Laser

Conference on Lasers and Electro-Optics (2017)

Yanchun Yin Andrew Chew Xiaoming Ren Jie Li Yang Wang

We present an approach for generation, amplification, and compression of 4-12 µm pulses by tailoring the phase matching of ZGP in broadband-pumped dual-chirped optical parametric amplification and by indirect pulse shaping.

Optical parametric amplifier

Chirped pulse amplification

10.1364/cleo_at.2017.jth2a.58

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Tabletop attosecond X-rays in the water window

Advances in atomic, molecular, and optical physics (2020)

Seunghwoi Han Jie Li Zheyuan Zhu Andrew Chew Esben W. Larsen

Attosecond

Water window

Streaking

Chirp

10.1016/bs.aamop.2020.04.003

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Citations (5)

Laser waveform control of extreme ultraviolet high harmonics from solids

Optics Letters (2017)

Yong Sing You Mengxi Wu Yanchun Yin Andrew Chew Xiaoming Ren

Solid-state high-harmonic sources offer the possibility of compact, high-repetition-rate attosecond light emitters. However, the time structure of high harmonics must be characterized at the sub-cycle level. We use strong two-cycle laser pulses to directly control the time-dependent nonlinear current in single-crystal MgO, leading to the generation of extreme ultraviolet harmonics. We find that harmonics are delayed with respect to each other, yielding an atto-chirp, the value of which depends on the laser field strength. Our results provide the foundation for attosecond pulse metrology based on solid-state harmonics and a new approach to studying sub-cycle dynamics in solids.

Attosecond

Extreme ultraviolet

Chirp

10.1364/ol.42.001816

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Citations (129)

Attosecond Transient Absorption Spectroscopy near the L2,3-edge of Argon

Conference on Lasers and Electro-Optics (2018)

Andrew Chew Nicolas Douguet Coleman Cariker Jie Li Xiaoming Ren

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text A. Chew, N. Douguet, C. Cariker, J. Li, X. Ren, Y. Yin, L. Argenti, Z. Chang, and W. T. Hill, "Attosecond Transient Absorption Spectroscopy near the L2,3-edge of Argon," in Conference on Lasers and Electro-Optics, OSA Terchnical Digest (online) (Optica Publishing Group, 2018), paper FF1P.3. Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article

Attosecond

Transient (computer programming)

10.1364/cleo_qels.2018.ff1p.3

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Ultrashort laser-induced periodic structures on ZnSe substrate

Andrew Chew Yingjie Chai M. J. Soileau Cheng He Xiaoming Yu

High-power, ultrashort laser-induced periodic surface structures (also referred as ripples), which has been observed on metals, dielectrics and semiconductors surface, could be generated and deliberately modulated by controlling the incident laser pulse. The periodicity, orientation and structure are the typical parameters in the study this near/subwavelength structures. The formation mechanism of LIPSS is still under investigation, and the current formation mechanisms on LIPSS include classical surface scattering model, self-organization, second/third harmonic generation, excitation of surface plasma polaritons, coulomb explosion, and cavitation instability and so on. In our work, 1-on-1 and N-on-1 laser-induced damage experiments were conducted on ZnSe substrate by using 170 fs laser and few-cycle laser to verifying the structure dependence with polarization, periodicity, and laser-induced damage threshold. Damage mechanism based on phenomenon was proposed.

10.1117/12.2501950

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Citations (1)

Attosecond light sources in the water window

Journal of Optics (2017)

Xiaoming Ren Jie Li Yanchun Yin Kun Zhao Andrew Chew

As a compact and burgeoning alternative to synchrotron radiation and free-electron lasers, high harmonic generation (HHG) has proven its superiority in static and time-resolved extreme ultraviolet spectroscopy for the past two decades and has recently gained many interests and successes in generating soft x-ray emissions covering the biologically important water window spectral region. Unlike synchrotron and free-electron sources, which suffer from relatively long pulse width or large time jitter, soft x-ray sources from HHG could offer attosecond time resolution and be synchronized with their driving field to investigate time-resolved near edge absorption spectroscopy, which could reveal rich structural and dynamical information of the interrogated samples. In this paper, we review recent progresses on generating and characterizing attosecond light sources in the water window region. We show our development of an energetic, two-cycle, carrier-envelope phase stable laser source at 1.7 μm and our achievement in producing a 53 as soft x-ray pulse covering the carbon K-edge in the water window. Such source paves the ways for the next generation x-ray spectroscopy with unprecedented temporal resolution.

Water window

Attosecond

Extreme ultraviolet

10.1088/2040-8986/aaa394

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Citations (73)

Quantum Beats in Attosecond Transient Absorption of Krypton Autoionizing States

Yan Cheng Michael Chini Xiao‐Min Tong Andrew Chew Julius Biedermann

Quantum beats with periods of 5-10 fs are observed in various near-threshold autoionizing states of krypton atoms in an attosecond transient absorption experiment, such measurement allows reconstruction of the valence state wave packets.

Krypton

Attosecond

Quantum beats

Transient (computer programming)

10.1364/cleo_qels.2015.fth3c.3

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Erratum: 53-attosecond X-ray pulses reach the carbon K-edge

Nature Communications (2017)

Jie Li Xiaoming Ren Yanchun Yin Kun Zhao Andrew Chew

Abstract Nature Communications 8 :186 10.1038/s41467-017-00321-0 (2017); Article published online: 4 August 2017

Attosecond

10.1038/s41467-017-01281-1

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Citations (10)