A5034280976- Laser Material Processing Techniques
- Advanced Fiber Laser Technologies
- Solid State Laser Technologies
- Metamaterials and Metasurfaces Applications
- Asymmetric Synthesis and Catalysis
- Glass properties and applications
- Radioactive element chemistry and processing
- Oxidative Organic Chemistry Reactions
- Orbital Angular Momentum in Optics
- Plasmonic and Surface Plasmon Research
- Extraction and Separation Processes
- Photorefractive and Nonlinear Optics
- Advanced Surface Polishing Techniques
- Nuclear Materials and Properties
- Chemical Synthesis and Characterization
- Nuclear materials and radiation effects
- Nuclear Physics and Applications
- Synthetic Organic Chemistry Methods
- Diamond and Carbon-based Materials Research
- Laser-Ablation Synthesis of Nanoparticles
- Polyoxometalates: Synthesis and Applications
- Radioactive Decay and Measurement Techniques
- Adhesion, Friction, and Surface Interactions
- Metal-Organic Frameworks: Synthesis and Applications
- Groundwater flow and contamination studies
Taiyuan Normal University
2019-2024
Key Laboratory of Zoological Systematics and Evolution
2023
Hebei University
2023
Arizona State University
2022
Chinese Academy of Sciences
1998-2021
Institute of Modern Physics
2009-2021
Ji Hua Laboratory
2021
Shanghai Institute of Organic Chemistry
2016-2020
Jilin University
2015-2020
University of Chinese Academy of Sciences
2020
Abstract Graphene is an attractive material for all-optical modulation because of its ultrafast optical response and broad spectral coverage. However, graphene modulators reported so far require high pump fluence due to the ultrashort photo-carrier lifetime limited absorption in graphene. We present modulator designs based on graphene-metal hybrid plasmonic metasurfaces with highly enhanced light-graphene interaction nanoscale hot spots at probe (signal) wavelengths. Based this design...
The first asymmetric dearomatization addition reaction of halomethyl arenes including benzofuran and benzothiophene was enabled by chromium catalysis. A variety aldehydes served as suitable electrophiles under mild conditions. Molecular complexities are quickly increased in a highly diastereo- enantioselective manner.
Ultrashort pulsed laser photoinscription of Ti:Sapphire crystals may result in the self-organization nanoscale material redistribution regions regular patterns within trace and stress-induced birefringence around trace. We report on formation anisotropic optical waveguides by a procedure that involves femtosecond inscription adjacent nonguiding birefringent traces with nanopatterned crosssections accumulation stress region between. Double parallel line structures separation 25μm vertical...
It is a big challenge to weld two materials with large differences in coefficients of thermal expansion and melting points. Here we report that the welding between fused silica (softening point, 1720°C) SiC wafer (melting 3100°C) achieved near infrared femtosecond laser at 800 nm. Elements are observed have spatial distribution gradient within cross section line, revealing mixing inter-diffusion substances occurred during irradiation. This attributed induced local phase transition volume...
We report on the single-step fabrication of stressed optical waveguides with tubular depressed-refractive-index cladding in phosphate glasses by use focused femtosecond hollow laser beams. Tubelike low index regions appear under direct exposure due to material rarefaction following expansion. Strained compacted zones emerged domains neighboring track lower refractive index, and waveguiding occurs mainly within tube core fabricated engineered beam. The profile waveguide was reconstructed from...
Two-dimensional (2D) materials as saturable absorbers (SAs) have attracted intense interest for applications in pulsed laser generation because of their distinguishing optical properties. However, the existing methods preparing SAs were insufficient. Here, we fabricated graphene oxide (GO) by Langmuir-Blodgett (LB) passively Q-switched Nd:YAG laser. The GO sheets deposited on a quartz plate using LB method. Two different LB-GO grown under surface pressure 22 and 38 mN/m obtained. Compared...
Abstract The asymmetric dearomatization and addition reaction of bromomethylnaphthalenes with aldehydes proceeded smoothly in the presence carbazole‐based bisoxazoline CrCl 2 complex to give corresponding enanioenriched hydroxylated products. excellent chemo‐, regio‐, diastereo‐ enantioselecitivity are remarkable. Furthermore, hydrogenation product led highly elaborated compound containing three contiguous stereogenic centers. magnified image
The Ti-6Al-4V polished by femtosecond laser processing is first investigated. surface nanoparticles of induced have been characterized scanning electron microscopy and energy dispersive spectrometry, the influence fluence overlapping rate beam on roughness also analyzed. Moreover, relationship between parameters has revealed, fine obtained based optimized parameters.
Two-dimensional (2D) materials, which possess rich underlying physical properties that can provide the potential for designing more efficient and compact optoelectronic devices, have attracted great interest among scientists. Due to atomic-scale thickness anisotropy of in-plane conductivity, 2D black phosphorus (BP) exhibits a polarization-dependent absorption spectrum with low absorption, limits its further development in polarization-independent applications such as light absorbers...
Depressed cladding concepts such as double line depressed index and tubular low waveguide structures were fabricated in bulk photo-thermo-refractive glass using femtosecond laser pulses. Effects of the writing power, geometrical heat treatment on light guiding properties investigated. The results show that design exhibits better performances than waveguides PTR glass. For waveguide, single multimode fields can be obtained for a wide processing parameter window. simulations agree well with...
Symmetric embedded waveguides were fabricated in heavy metal oxide SF10 glass using slit-shaped infrared femtosecond laser writing the low-repetition frequency regime. The impact of parameters on waveguide formation transverse scheme was systemically studied. Results indicate that efficient can be inscribed a wide parameter space ranging from 500 fs to 1.5 ps pulse duration, 0.7-4.2 μJ energy, and 5 μm/s 640 scan speed pointing out robustness photoinscription process. refractive index...
We fabricate a buried channel waveguide in neodymium-doped phosphate glass using double line approach by femtosecond laser writing.Raman spectra reveal an expansion of the network irradiated region.Given stress-induced positive refractive index change, waveguiding between two separated tracks is demonstrated.The difference profile reconstructed from measured near-field mode.Propagation loss scattering technique.Microluminescence that Nd 3+ fluorescence property not significantly affected...
ABSTRACT Silica supported methyltrioxorhenium complex of γ-(2,2′-dipyridyl)-aminopropyl polysiloxane (III) has been synthesized and demonstrated as a novel catalyst high activity, stability improved selectivity for epoxidation alkenes with hydrogen peroxide at room temperature. The can be recycled least five times.
Solvent extraction of molybdenum and tungsten as homologues Sg with α‐benzoinoxime from HCl solutions has been investigated. The equilibration was achieved at 20s for Mo W. Molybdenum almost quantitatively extracted 0.001 to 4 M solutions, the yields decreased higher lower acid concentrations due formation anionic oxychloride complex species MO4 2−, respectively. yield W than that during whole range concentration. composition determined by using slope method in present experiment. elemental...
In this work, a Tungsten disulfide (WS2) reflective saturable absorber (SA) fabricated using the Langmuir-Blodgett technique was used in solid state Nd:YVO4 laser operating at 1.34 µm. A Q-switched constructed. The shortest pulse width 409 ns with repetition rate of 159 kHz, and maximum output power 338 mW. To best our knowledge, it is first time that short pulses have been generated µm WS2 SA by method.
The L-shape waveguide was written in fused silica using a femtosecond laser with beam shaping. guiding structure supports good light turning; 0.88 dB/turn achieved at the silica-air interface. By finite-different time-domain method, turn loss due to turning and refractive index of has been simulated. results show that proposed method unprecedented flexibility fabricating 90°-bend waveguide.
We had proved that a kind of graphene nanomaterial "carboxyl-functionalized oxide (GO-COOH)" possessed nonlinear saturable absorber (SA) property. The modulation depth GO-COOH water solution was measured as ∼8%. Moreover, GO-COOH-based SA device made and applied in an erbium-doped fiber laser. In this laser, Q-switching pulses mode-locked were both obtained. With increase the pump power, pulse width decreased from 9.05 to 2.49 μs. 844 fs, corresponding spectral bandwidth 3.64 nm....
Abstract Ridge waveguides were fabricated in Yb 3+ -doped silicate glass by proton implantation combined with the femtosecond laser ablation. The implanted H + ions double-energy (470 keV 500 keV) at a total dose of 3 × 10 16 cm −2 for formation planar waveguides. After annealing 260 °C, double-line modification tracks, which provide lateral confinement light to form ridge waveguide structures, inscribed on surface sample μ J pulse energy, 50 m s −1 scan speed, and 25 separation. vacancy...
Abstract Strip optical waveguides were realized in Yb 3+ -doped silicate glass with ultrashort pulse laser ablation assisted He + ion implantation. Planar first prepared near the surface by implantation (450 keV 500 550 keV), followed annealing at 260℃. After that, under processing parameters of 3 μJ energy and 50 μm/s velocity, two parallel tracks separation 15, 20, 25 μm were, respectively, inscribed on sample, which confine light lateral direction to form a strip waveguide. The near-field...