publications
peer-reviewed publications in reverse chronological order
51 peer-reviewed publications
2026
- Plasma Phys. Control. Fusion2026Evidence of electron microbunching in laser-driven modulated downramp injection and prospects for beam-driven implementationSummary: Reports the first experimental evidence of electron microbunching via modulated downramp injection in a laser wakefield accelerator and proposes a beam-driven scheme for FACET-II to generate attosecond, high-current beams.
2025
- Nat. Commun.
2024
- Phys. Rev. Lett.2024Bidirectional cascaded superfluorescent lasing in air enabled by resonant third harmonic photon exchange from nitrogen to argonSummary: Discovery of a new mechanism for cavity-free lasing in atmospheric air through third-harmonic photon mediated resonant energy transfer from nitrogen to argon, enabling bidirectional two-color cascaded superfluorescent lasing.
- Phys. Rev. Accel. Beams2024Wakefield generation in hydrogen and lithium plasmas at FACET-II: Diagnostics and first beam-plasma interaction resultsSummary: Experimental progress at FACET-II toward demonstrating high-gradient plasma wakefield acceleration with simultaneous high energy transfer efficiency and beam quality preservation, including advanced diagnostics and initial beam-plasma interaction results.
- Phys. Plasmas2024Thermal Weibel instability induced magnetic fields co-exist with linear wakes in laser-ionized plasmasSummary: Experimental and simulation study demonstrating coexistence of Weibel instability-induced magnetic fields and linear plasma wakes in laser-ionized plasmas, with implications for multi-bunch acceleration schemes.
- Plasma Phys. Control. Fusion
- Nat. Commun.2024Plasma electron acceleration driven by a long-wave-infrared laserSummary: Demonstration of laser-driven plasma acceleration using a long-wave-infrared CO2 laser, achieving relativistic electron acceleration with sub-TW power and observing transition from self-modulation to bubble-regime acceleration.
- J. Plasma Phys.2024Correlations between X-rays, visible light and drive-beam energy loss observed in plasma wakefield acceleration experiments at FACET-IISummary: Experimental study documenting correlations between betatron X-ray signals, visible plasma light, and drive beam energy loss in plasma wakefield acceleration, demonstrating non-invasive diagnostics for energy transfer monitoring.
- Commun. Phys.2024Efficient generation and amplification of intense vortex and vector laser pulses via strongly-coupled stimulated Brillouin scattering in plasmasSummary: Demonstrates strongly-coupled stimulated Brillouin scattering in plasmas as a promising amplification technique for vortex and vector laser pulses with up to 65% energy transfer efficiency, enabling all-optical polarization control and novel angular momentum couplings for plasma-based optical devices.
2023
- Phys. Rev. Res.2023Efficient generation of tunable magnetic and optical vortices using plasmasSummary: Demonstrates efficient generation of multimegagauss magnetic and tunable optical vortices through interaction of relativistic ionization fronts with Laguerre-Gaussian laser pulses, achieving up to 90% conversion efficiency and controllable topological charges via plasma density and orbital angular momentum manipulation.
- Phys. Rev. Accel. Beams2023Underdense plasma lens with a transverse density gradientSummary: Presents theoretical model for transverse density gradients in underdense plasma lenses based on 3D particle-in-cell simulations, enabling analytical study of beam dynamics and estimation of witness electron bunch deflection for density uniformity tolerance studies in plasma accelerators.
2022
- Phys. Rev. Res.2022Highly spin-polarized multi-GeV electron beams generated by single-species plasma photocathodesSummary: Demonstrates generation of highly spin-polarized electron beams using single-species ytterbium plasma photocathodes, achieving 56% net spin polarization and 15 GeV acceleration in 41 cm through combined time-dependent Schrödinger equation and particle-in-cell simulations.
- Phys. Plasmas2022Electron Weibel instability induced magnetic fields in optical-field ionized plasmasSummary: Presents comprehensive experimental and theoretical study of electron Weibel instability in optical-field ionized plasmas using time-resolved measurements with external electron probe bunches, extending previous work to both non-relativistic and quasi-relativistic regimes.
- Opt. Express2022Cross-polarized common-path temporal interferometry for high-sensitivity strong-field ionization measurementsSummary: Develops a highly sensitive cross-polarized common-path temporal interferometer with balanced detection achieving 0.6 mrad sensitivity for plasma density measurements, enabling comprehensive verification of strong-field ionization models across multiple regimes and gas types.
2021
- Phys. Rev. Lett.2021Extremely dense gamma-ray pulses in electron beam-multifoil collisionsSummary: Demonstrates that high-current ultrarelativistic electron beams interacting with multiple submicrometer-thick conducting foils undergo strong self-focusing with efficient gamma-ray synchrotron emission, achieving femtosecond collimated beams with number density exceeding that of a solid.
- Phys. Plasmas2021Ultra-short pulse generation from mid-IR to THz range using plasma wakes and relativistic ionization frontsSummary: Demonstrates numerical and experimental techniques for generating ultra-short pulses covering 1-150 μm wavelength range using plasma wakes for frequency downshifting and relativistic ionization fronts for upshifting, enabling comprehensive coverage of the molecular fingerprint region.
- Plasma Phys. Control. Fusion2021Ionization induced plasma grating and its applications in strong-field ionization measurementsSummary: Novel technique using ionization-induced plasma gratings for absolute ionization degree measurements in strong-field physics.
- Nat. Phys.2021High-throughput injection–acceleration of electron bunches from a linear accelerator to a laser wakefield acceleratorSummary: Demonstrates external injection from a conventional linear accelerator into a laser wakefield accelerator with nearly 100% coupling efficiency and subsequent acceleration without charge loss, representing a crucial step toward hybrid conventional-plasma-based accelerators.
2020
- Plasma Phys. Control. Fusion2020Probing thermal Weibel instability in optical-field-ionized plasmas using relativistic electron bunchesSummary: Proposes using ultrashort relativistic electron beams to probe the spatiotemporal evolution of self-generated magnetic fields in thermal Weibel instability, demonstrating how laser polarization controls magnetic field topology in optical-field-ionized plasmas.
- Plasma Phys. Control. Fusion2020Initializing anisotropic electron velocity distribution functions in optical-field ionized plasmasSummary: Demonstrates controlled generation of anisotropic electron velocity distributions in optical-field ionized helium plasmas through laser polarization control, enabling systematic study of plasma kinetic instabilities with Thomson scattering diagnostics.
- New J. Phys.2020Ion acceleration with an ultra-intense two-frequency laser tweezerSummary: Introduces a novel ultra-intense optical tweezer concept using two counter-propagating circularly polarized lasers of different frequencies to create controlled electron displacement and generate narrow-energy-spread ion beams from nano-foil targets with high efficiency.
- Nat. Commun.2020Photon deceleration in plasma wakes generates single-cycle relativistic tunable infrared pulsesSummary: Demonstrates experimental generation of high-power ( 100 GW) near single-cycle wavelength tunable (3–20 µm) infrared pulses using photon deceleration in laser-produced plasma wakes, enabling novel applications in relativistic nonlinear optics and molecular fingerprint spectroscopy.
- Commun. Phys.2020Conservation of angular momentum in second harmonic generation from under-dense plasmasSummary: Verifies conservation of total angular momentum in photons through experimental measurement of helical phase in second harmonic radiation from underdense plasma, demonstrating conversion between spin and orbital angular momentum using Laguerre-Gaussian beams.
2019
- Sci. Rep.2019High-resolution phase-contrast imaging of biological specimens using a stable betatron X-ray source in the multiple-exposure modeSummary: First demonstration of high-resolution (5 μm) phase-contrast imaging using stable betatron X-ray source with <5% jitter in multiple-exposure mode, achieving biological imaging with modest 30-40 TW lasers for practical tabletop applications.
- Phys. Rev. Lett.2019Phase space dynamics of a plasma wakefield dechirper for energy spread reductionSummary: Demonstration of plasma wakefield dechirper achieving 10-fold reduction in electron beam energy spread from 1.28% to 0.13% FWHM, bringing plasma accelerator beam quality to levels needed for coherent light sources and colliders.
- Phys. Rev. Accel. Beams2019Effect of fluctuations in the down ramp plasma source profile on the emittance and current profile of the self-injected beam in a plasma wakefield acceleratorSummary: Comprehensive 2D/3D PIC simulation study of down ramp injection for FACET-II, demonstrating ultra-low emittance beams ( 0.03 μm) and investigating the effects of ramp profile fluctuations on beam quality and current profiles.
- Phys. Rev. Appl.2019Near-ideal dechirper for plasma-based electron and positron acceleration using a hollow channel plasmaSummary: Novel near-ideal dechirper concept using hollow channel plasma to reduce energy spread from few-percent to ≲0.1% without emittance growth, enabling applications to free-electron lasers and colliders through large-scale 3D PIC simulations.
2018
- Phys. Rev. E2018Physical mechanism of the electron-ion coupled transverse instability in laser pressure ion acceleration for different regimesSummary: Extended one-dimensional two-fluid theory clarifying the physical mechanism of transverse instability in radiation pressure ion acceleration, demonstrating electron-ion coupling via ponderomotive force as the dominant instability source.
- Plasma Phys. Control. Fusion2018Probing plasma wakefields using electron bunches generated from a laser wakefield acceleratorSummary: Experimental demonstration of probing plasma wakefield structures using femtosecond relativistic electron bunches from laser wakefield accelerators, capturing wake evolution in density gradients and parallel wake structures.
- Plasma Phys. Control. Fusion2018Transverse phase space diagnostics for ionization injection in laser plasma acceleration using permanent magnetic quadrupolesSummary: Development and application of permanent magnetic quadrupole-based transverse phase space diagnostics for characterizing ionization injection electron beams in laser plasma acceleration with high precision.
- Plasma Phys. Control. Fusion2018Phase locked multiple rings in the radiation pressure ion acceleration processSummary: Theoretical and simulation study revealing phase-locked double ring structures in ion phase space during radiation pressure acceleration, caused by ponderomotive trapping in moving standing waves from laser contrast effects.
- Plasma Phys. Control. Fusion2018On the feasibility of sub-100 nm rad emittance measurement in plasma accelerators using permanent magnetic quadrupolesSummary: Systematic analysis of permanent magnetic quadrupole-based emittance measurement accuracy and reliability for sub-100 nm rad emittance beams from plasma accelerators, identifying key error sources and alignment requirements.
- Phys. Plasmas2018Tri-stage quasimonoenergetic proton acceleration from a multi-species thick targetSummary: Novel tri-stage acceleration mechanism for generating quasimonoenergetic proton beams from multi-species thick targets, achieving 200 MeV protons with narrow energy spread suitable for medical applications using 100s TW lasers.
- Nat. Photon.2018Relativistic single-cycle tunable infrared pulses generated from a tailored plasma density structureSummary: Breakthrough demonstration of tunable relativistically intense single-cycle infrared pulses (5-14 μm) generated from tailored plasma density structures with 1.7% conversion efficiency and locked carrier-envelope phase for strong-field physics applications.
2017
- Phys. Rev. Lett.2017Femtosecond probing of plasma wakefields and observation of the plasma wake reversal using a relativistic electron bunchSummary: First demonstration of femtosecond relativistic electron microscopy for visualizing plasma wakefields.
2016
- Phys. Rev. Lett.2016Physical mechanism of the transverse instability in radiation pressure ion accelerationSummary: Theoretical model and 2D PIC simulations revealing the physical mechanism behind transverse instability in radiation pressure ion acceleration, analogous to oscillating two-stream instability in ICF research.
- Phys. Rev. Lett.2016Physics of phase space matching for staging plasma and traditional accelerator components using longitudinally tailored plasma profilesSummary: Novel approach using longitudinally tailored plasma density profiles to achieve phase space matching between plasma accelerator stages and traditional accelerator components with negligible emittance growth.
- Phys. Rev. Lett.2016Nanoscale electron bunching in laser-triggered ionization injection in plasma acceleratorsSummary: Theoretical analysis and 3D simulations revealing nanoscale electron bunching in ionization injection due to phase-dependent tunneling ionization and nonlinear trapping dynamics, enabling coherent transition radiation generation.
- Phys. Rev. Accel. Beams
- Plasma Phys. Control. Fusion2016Low-energy-spread laser wakefield acceleration using ionization injection with a tightly focused laser in a mismatched plasma channelSummary: Improved ionization injection scheme using tightly focused laser in mismatched plasma channel achieving ultrashort electron bunches with narrow energy spread through shortened injection distance and envelope oscillation effects.
- Plasma Phys. Control. Fusion2016Colliding ionization injection in a plasma wakefield acceleratorSummary: Novel scheme for generating high-quality electron bunches using counter-propagating laser pulse for ionization injection in beam-driven plasma wake with tunable injection distance and synchronized electron release.
2015
- Chin. Phys. C2015Generating 10–40 MeV high quality monoenergetic electron beams using a 5 TW 60 fs laser at Tsinghua UniversitySummary: Demonstration of high-quality monoenergetic electron beam generation using a compact 5 TW 60 fs laser system at Tsinghua University, achieving 10-40 MeV beams with excellent beam quality.
2014
- Phys. Rev. Lett.2014Phase-Space Dynamics of Ionization Injection in Plasma-Based AcceleratorsSummary: Theoretical and simulation study revealing the complex phase-space evolution of electron beams in ionization injection, providing analytical framework for achieving ultralow emittance beams.
- Phys. Rev. ST Accel. Beams2014Low emittance electron beam generation from a laser wakefield accelerator using two laser pulses with different wavelengthsSummary: Novel two-color laser scheme separating wakefield excitation from injection process enables generation of ultralow emittance electron beams with more than one order of magnitude improvement.
2013
- Phys. Rev. Lett.2013Generating High-Brightness Electron Beams via Ionization Injection by Transverse Colliding Lasers in a Plasma Wakefield AcceleratorSummary: Novel ionization injection scheme using transverse colliding lasers produces ultra-bright electron beams with unprecedented low emittance in plasma wakefield accelerators.