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Article
Open AccessStable, intense supercontinuum light generation at 1 kHz by electric field assisted femtosecond laser filamentation in air
Supercontinuum (SC) light source has advanced ultrafast laser spectroscopy in condensed matter science, biology, physics, and chemistry. Compared to the frequently used photonic crystal fibers and bulk materia...
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Article
Free-electron lasing at 27 nanometres based on a laser wakefield accelerator
X-ray free-electron lasers can generate intense and coherent radiation at wavelengths down to the sub-ångström region1–5, and have become indispensable tools for applications in structural biology and chemistry, ...
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Article
High-harmonic generation from topological surface states
Three-dimensional topological insulators are a phase of matter that hosts unique spin-polarized gapless surface states that are protected by time-reversal symmetry. They exhibit unconventional charge and spin ...
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Article
Direct map** of attosecond electron dynamics
The subcycle interaction of light and electrons has been one of the key frontiers in free-electron lasers, attosecond science and dynamical investigation of matter. Capturing the underlying subcycle dynamics o...
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Chapter
The Shanghai Superintense Ultrafast Laser Facility (SULF) Project
We report the recent progress on the Shanghai Superintense Ultrafast Laser Facility (SULF) project. The schematic design of SULF is described. The upgrade information from SULF laser prototype to SULF 10 PW la...
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Article
Open AccessDriving positron beam acceleration with coherent transition radiation
Positron acceleration in plasma wakefield faces significant challenges, as the positron beam must be pre-generated and precisely coupled into the wakefield and, most critically, suffers from defocusing issues....
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Article
Open AccessLaser guided ionic wind
We report on a method to experimentally generate ionic wind by coupling an external large electric field with an intense femtosecond laser induced air plasma channel. The measured ionic wind velocity could be ...
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Article
Open AccessTerawatt-scale optical half-cycle attosecond pulses
Extreme-ultravoilet (XUV) attosecond pulses with durations of a few tens of attosecond have been successfully applied for exploring ultrafast electron dynamics at the atomic scale. But their weak intensities l...
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Article
Open AccessCorona discharge induced snow formation in a cloud chamber
Artificial rainmaking is in strong demand especially in arid regions. Traditional methods of seeding various Cloud Condensation Nuclei (CCN) into the clouds are costly and not environment friendly. Possible so...
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Article
Femtosecond-laser-driven wire-guided helical undulator for intense terahertz radiation
The capability of synchrotron radiation to produce ultrabright emission has attracted considerable interest over the last half a century. To date, magnetic undulators with a period of several centimetres are c...
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Article
Open AccessUltrahigh brilliance quasi-monochromatic MeV γ-rays based on self-synchronized all-optical Compton scattering
Inverse Compton scattering between ultra-relativistic electrons and an intense laser field has been proposed as a major route to generate compact high-brightness and high-energy γ-rays. Attributed to the inher...
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Article
Open AccessFemtosecond laser filament induced condensation and precipitation in a cloud chamber
A unified picture of femtosecond laser induced precipitation in a cloud chamber is proposed. Among the three principal consequences of filamentation from the point of view of thermodynamics, namely, generation...
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Chapter
THz Waveforms and Polarization from Laser Induced Plasmas by Few-Cycle Pulses
Terahertz ( THz \(\mathop{\mathrm{THz}}\nolimits\) ) em...
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Chapter
Lasing Actions Inside a Femtosecond Laser Filament in Air
Lasing action inside a femtosecond laser filament in air has recently attracted much attention due to its important application on enhanced remote sensing. In this chapter, we summarize our recent experimental...
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Article
Open AccessDirect observation of laser guided corona discharges
Laser based lightning control holds a promising way to solve the problem of the long standing disaster of lightning strikes. But it is a challenging project due to insufficient understanding of the interaction...
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Article
Differently patterned airflows induced by 1-kHz femtosecond laser filaments in a cloud chamber
Airflow induced by femtosecond laser (800 nm/1 kHz/25 fs) filamentation with different lengths was investigated in a laboratory cloud chamber. Various filament lengths were generated by adjusting laser energy ...
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Article
Open AccessHollow screw-like drill in plasma using an intense Laguerre–Gaussian laser
With the development of ultra-intense laser technology, MeV ions can be obtained from laser–foil interactions in the laboratory. These energetic ion beams can be applied in fast ignition for inertial confineme...
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Chapter
Phase Evolution and THz Emission from a Femtosecond Laser Filament in Air
The recent progress in the study of waveform-controlled terahertz (THz) generation from air plasma at SIOM is reviewed. Carrier envelope phase (CEP) stabilized Infrared (center wavelength
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Article
Laser-induced supersaturation and snow formation in a sub-saturated cloud chamber
Calculation of the saturation ratio inside vortices formed below the filament in a sub-saturation zone in a cloud chamber was given. By mixing the air with a large temperature gradient, supersaturation was sus...
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Article
Circularly polarized sub-1.5 cycle laser pulses at 1.8 μm
The generation of intense carrier-envelope-phase-stabilized sub-1.5 cycle circularly polarized pulses at 1.8 μm is reported. After changing the polarization of the pulses produced by an optical parameter ampli...
