A5085551798- Luminescence Properties of Advanced Materials
- Glass properties and applications
- Plasmonic and Surface Plasmon Research
- Nuclear materials and radiation effects
- Solid State Laser Technologies
- Radiation Detection and Scintillator Technologies
- Photonic and Optical Devices
- Photonic Crystals and Applications
- Advanced Photocatalysis Techniques
- Quantum Dots Synthesis And Properties
- bioluminescence and chemiluminescence research
- Luminescence and Fluorescent Materials
- Ga2O3 and related materials
- Copper-based nanomaterials and applications
- Lanthanide and Transition Metal Complexes
- Online Learning and Analytics
- TiO2 Photocatalysis and Solar Cells
- Optical properties and cooling technologies in crystalline materials
- Nanoplatforms for cancer theranostics
- Copper Interconnects and Reliability
- Optical Imaging and Spectroscopy Techniques
- Advanced Antenna and Metasurface Technologies
- Metamaterials and Metasurfaces Applications
- Pigment Synthesis and Properties
- Innovative Teaching Methods
Hunan University
2006-2021
Changchun Institute of Optics, Fine Mechanics and Physics
2002-2005
Chinese Academy of Sciences
2002-2005
Y 2 O 3 : Eu nanotubes were fabricated by a surfactant assembly mechanism. The tubular structure was characterized transmission electron microscopy. Under an ultraviolet-light excitation, the show relatively intense emission peak at 618 nm besides 610 peak, different from that of single Y2O3:Eu nanocrystallites. results laser-selective excitation indicate centers near surface nanotube walls exhibit inhomogenously broadened spectra without spectral structures while two sites (sites B and C)...
Zn 0.3 Al 0.25 Pb Li 0.098 Yb 0.1 Tm 0.002 F 2.354 amorphous fluoride film was prepared by pulsed laser deposition. Ultraviolet and blue up-conversion emissions were observed under infrared excitation at 978 nm. In comparison with the upconversion of target, ultraviolet are enhanced greatly. The enhancement is attributed to a decrease Judd–Ofelt parameter Ω2 induced deposition, which precludes transition rate from 3F2 3F4 enhances energy transfer process populates 1D2 level:...
We propose a composite metasurface composed of InSb strips and SiO2a substrate, which can achieve multi-band coherent perfect absorption (CPA) in the terahertz frequency range. It is demonstrated that different sizes support independent plasmon resonances at frequencies, linear superposition each subunit. The resonance be independently continuously modulated with modulation depth up to 1.332 × 104via controlling relative phase or intensity two beams. Meanwhile, absorber has sensitivity...
The effect of silver film thickness on the surface plasma resonance was investigated in rectangular Ag-Si-SiO2 cavity by FDTD. resonant intensity, quality factors and extinction ratios, intensity decay length electric field, amplitude E0 farfield Re(E) are closely related to t, especially field magnetic at t ≤ 5 nm. By fine tuning film, this structure can be used as wave filter good laser resonator when ≥ 8 nm, phase regulator 10 nm electromagnetic monitor farfield.
Abstract In the epidemic period, online teaching has become most important form. On basis of questions-centred massive open courses (MOOCs) teaching, mode college physics was studied and discussed using Tencent classroom, WeChat/QQ Wisdom Tree Platform. MOOCs before class, classroom during in whole process including solving problems after Platform for quality inspection were practiced each chapter mass point kinematics. Due to problem-oriented implementation three stages, results mock test...
Nanocrystalline Gd2O3:Eu3+ was prepared by modified combustion synthesis using citric acid as the fuel and metal nitrates oxidants. By X-ray diffraction (XRD)，high resolution transmission electron microscopy (HRTEM) fluorescence spectrophotometry, structural, morphological luminescent properties of nanocrystals were investigated. The results showed that nanocrystal with pure cubic phase produced after samples different acid-to-metal nitrate (C/M) molar ratios calcined at 800℃ for 1 hour....
Abstract In this paper, influence of InP coupling cavity on Fano resonance sub wavelength MIM waveguide was studied by FDTD. It observed that the resonant wavelengths mode m j (j = 1, 2, 3) were closely related with height H 2 cavity. addition, before and after addition air cavity, relative farfield intensities I a function . Therefore, as discrete state could be used filling dielectrics in waveguide.
Y2O3:Eu3+ (YOE) material is an important photoluminescence (PL) material. In this paper, YOE nano-powder was prepared by the low-temperature combustion method (LTC) and sol-gel (SG), annealed with different temperatures, respectively. The influence of preparation methods annealing temperature on optical properties were well studied. as-synthesized nano-YOE samples characterized x-ray diffraction (XRD), PL spectra, Fourier transform infrared spectroscopy (FTIR). Results show that increase in...
Nanocrystalline zirconia doped with 1mol%Eu3+ was prepared by co-precipitation method, Its structure characterized x-ray diffraction(XRD), the grain size of nanocrystals about 10nm obtained XRD and Scherrer' equation. The luminescence nanosized powders Eu3+ ions investigated under 394nm excitation, emission 5D0→7F2 transition peaked at 604nm. Furthermore, an enhanced 604nm induced ultraviolet irradiation observed for ions.
Abstract According to simulation results from FDTD, Fano resonance of the air-Si-Si-air combined waveguide cavity was mainly studied, including distribution magnetic field, quality factor, extinction coefficient and transmission efficiency. related height Si. When H 2 = 140 nm Si 1 300 nm, there higher in resonant better resonator, whose efficiency surface plasma up 89% for 1110 nm. This had very good filtering effect.
The Mo-doped titania exhibits a visible broadband emission under 978 nm laser diode excitation. luminescence has been assigned to the transitions from excited states 3T1, 3T2 ground state 1A1 of ［MoO4］2- radical. In TiO2∶Mo system, p ower dependence upconversion-luminescence intensity exceeds quadratic dependence, and time evolution upconversion after onset continuous wave excitation is characterized by rise 63 ms. These properties show typical fingerprints photon avalanche. No was observed...