A5101773376- Photonic and Optical Devices
- Photonic Crystals and Applications
- Advanced Fiber Laser Technologies
- Orbital Angular Momentum in Optics
- Mechanical and Optical Resonators
- Electrocatalysts for Energy Conversion
- Advanced Fluorescence Microscopy Techniques
- Analytical Chemistry and Chromatography
- Ammonia Synthesis and Nitrogen Reduction
- Nonlinear Optical Materials Studies
- Optical Polarization and Ellipsometry
- Near-Field Optical Microscopy
- Photorefractive and Nonlinear Optics
- Optical Coatings and Gratings
- Catalytic Processes in Materials Science
- Plasmonic and Surface Plasmon Research
- Mesoporous Materials and Catalysis
- Nanomaterials for catalytic reactions
- Advanced Electron Microscopy Techniques and Applications
- Advanced Photocatalysis Techniques
- Fuel Cells and Related Materials
- Fern and Epiphyte Biology
- Nanopore and Nanochannel Transport Studies
- Catalysis and Oxidation Reactions
- Nanofabrication and Lithography Techniques
University of British Columbia
2025
Beihang University
2018-2024
Fuzhou University
2014-2023
National Institute of Clean and Low-Carbon Energy
2017-2022
Northwest University
2018-2021
Institute of Modern Physics
2021
Tongji University
2017-2019
Central South University
2018
Liaocheng University
2012-2017
University of Southern California
2009-2014
A facile one-step strategy for anchoring defective CoNx single clusters on partly reduced graphene oxide (RGO) is constructed to significantly improve the catalytic performance of non-noble metal complexes toward oxygen reduction reaction (ORR). Sequent loading with trace amounts metal-free porphyrin and Co2+ in RGO can dramatically enhance both half-wave potential peak current density. Intriguingly, RGO/P/2Co cluster exhibits best ORR 0.834 V, extremely approaching that commercial Pt/C...
The harvesting of the energy stored in salinity gradient between seawater and river water by a membrane‐scale nanofluidic diode for sustainable generation electricity is attracting significant attention recent years. However, performance previously reported diodes sensitive to pH conditions, which restricts their potential applications wider fields with variable values. Herein, pH‐resistant high ion rectification ratio ≈85 that demonstrates stable property over range from 4 10 reported. This...
An ion-selective layer based on self-assembled polystyrene opals is integrated with an alumina nanoporous membrane to form nanofluidic diodes.
We propose an asymmetric photonic crystal (PC) waveguide, formed by moving the PC cladding on one side of line defect along waveguide core. By adjusting structural parameters, we flatten slow-mode dispersion curve, exclude extreme points from flat band, and avoid unacceptably large induced points. obtain ultra-flat band with inflection point corresponding to a slow-light mode reduced distortion. utilize finite-difference time-domain method verify inflection-point ultraslow wave.
Abstract Pore structure engineering of biocarbon is crucial for enhancing its performance. Herein, a phase diagram‐guided molten salt activation method systematically developed to prepare with tunable pore at low temperature (500 °C). This strategy incorporates key variables on the diagram binary salts, including type, ratio, partition, and operating temperature. Among various ZnCl 2 melting point (≈290 °C) selected as “pioneering” primary swell biomass precursor create porous channels...
In this paper, an asymmetric photonic crystal (PC) waveguide is proposed for slow light transmission. A row of air holes removed to form a line-defect waveguide, and the lateral symmetry broken by shifting in PC cladding on one side along axis. Two structural parameters are carefully adjusted: amount shift compared with array other side, radius closest core shifted cladding. it possible obtain flat band modes low group velocity ( <i xmlns:mml="http://www.w3.org/1998/Math/MathML"...
A novel photonic crystal lattice is proposed for trapping a two-dimensional array of particles. The created by introducing rectangular slot in each unit cell the Suzuki-Phase to enhance light confinement guided resonance modes. Large quality factors on order 10⁵ are predicted lattice. significant decrease optical power required can be achieved compared our previous design.
A fiber-taper-microsphere-coupled system was used to research the characteristics of laser oscillation and upconversion luminescence Yb3+:Er3+ co-doped phosphosilicate (YECP) microspheres. The YECP microspheres were fabricated by melting end filaments. Single- multimode at 1535-1565 nm within C-band obtained. In addition, output power single-mode 1545.5 can be as high 48.98 μW, which achieved under pump 9.63 mW, side-mode suppression ratio 51.49 dB. Upconversion fluorescence Er3+ 521, 532,...
We propose and evaluate a 2-D photonic crystal waveguide with two line defects separated by row of elliptic air holes. By adjusting the structural parameters, we obtain an inflection point on dispersion curve corresponding to slow-light mode reduced distortion. Moreover, investigate transversely confined field high quality factor, which both indicate that dispersionless slow wave can be generated in our guide.
Optical superlattice Er:LiNbO3 was fabricated by inducing a periodic ferroelectric domain structure into the crystal during growing process. Because of combination nonlinear optical properties LiNbO3 and spectral Er3+, can simultaneously emit second harmonic light through quasi-phase matching green upconversion at room temperature. Pumped infrared diode lasers, violet-and-green blue-and-green generation demonstrated in two samples. The detailed absorption spectrum emission were measured....
Abstract A new strategy to in situ immobilize iron (Fe) single clusters on N‐doped porous carbon under the confinement effect of N‐coordination supplied by porphyrins is demonstrated. During pyrolysis reaction, strong chelated interaction between Fe and N atoms serves as pivotal role for achieving via inhibiting superabundant aggregation atoms. Compared Fe‐based nanoparticles commercial Pt‐C, synthesized cluster catalyst (C/TP‐Fe700) owns a superior catalytic performance alkaline medium,...
We present an optomechanical method to tune phase and group birefringence in parallel silicon strip waveguides. first calculate the deformation of suspended, waveguides due optical forces. optimize frequency polarization pump light obtain a 9 nm for power 20 mW. Widely tunable can be achieved by varying power, with maximum values 0.026 0.13, respectively. The giant allows linear circular conversion within 30 microm 67 gives differential delay 6fs between orthogonal polarizations. also...
The tight binding approximation (TBA) is used to relate the intrinsic, radiation loss of a coupled resonator optical waveguide (CROW) that single constituent within light cone picture. We verify validity TBA via direct, full-field simulation CROWs based on L2 photonic crystal cavity. predicts quality factor CROW increases with isolated Moreover, our results provide method design low intrinsic across entire band.
The polymerization and feature size in micro/nanofabrication are usually controlled by changing the femtosecond laser pulse energy irradiation number. In this paper, we present coherent control of two-photon absorption (TPA) a polymer with isopropyl thioxanthone (ITX) photoinitiator modulating phase 800 nm pulses. We demonstrate experimentally theoretically that TPA probability can be efficiently shaped ultrashort By using method, volume fabricated microrod decreases to 1/125 induced Fourier...