A5100431229- Luminescence Properties of Advanced Materials
- Solid State Laser Technologies
- Atomic and Subatomic Physics Research
- Spectroscopy and Laser Applications
- Luminescence and Fluorescent Materials
- Radiation Detection and Scintillator Technologies
- Laser Design and Applications
- Quantum optics and atomic interactions
- Advanced Fiber Laser Technologies
- Perovskite Materials and Applications
- Glass properties and applications
- Advanced Semiconductor Detectors and Materials
- Cold Atom Physics and Bose-Einstein Condensates
- Gas Sensing Nanomaterials and Sensors
- Semiconductor Quantum Structures and Devices
- Advanced Fiber Optic Sensors
- Nanoplatforms for cancer theranostics
- Advanced Chemical Physics Studies
- Semiconductor Lasers and Optical Devices
- Solid-state spectroscopy and crystallography
- Quantum Dots Synthesis And Properties
- Photorefractive and Nonlinear Optics
- Photonic Crystal and Fiber Optics
- Random lasers and scattering media
- Lanthanide and Transition Metal Complexes
National University of Defense Technology
2014-2024
State Key Laboratory of Pulsed Power Laser Technology
2022
Key Laboratory of Nuclear Radiation and Nuclear Energy Technology
2022
Jilin Jianzhu University
2022
Nankai University
2022
China University of Geosciences (Beijing)
2022
Westlake University
2021
Jiangsu Normal University
2020-2021
Fudan University
2012-2018
Key Laboratory of Guangdong Province
2018
Abstract Novel β‐NaGdF 4 /Na(Gd,Yb)F :Er/NaYF :Yb/NaNdF :Yb core/shell 1/shell 2/shell 3 (C/S1/S2/S3) multi‐shell nanocrystals (NCs) have been synthesized and used as probes for in vivo imaging. They can be excited by near‐infrared (800 nm) radiation emit short‐wavelength infrared (SWIR, 1525 radiation. Excitation at 800 nm falls into the “biological transparency window”, which features low absorption water heat generation is considered to ideal excitation wavelength with least impact on...
Core/shell1/shell2/shell3 structured NaGdF4:Nd/NaYF4/NaGdF4:Nd,Yb,Er/NaYF4 nanocrystals were well designed and synthesized, each of the parts assume respective role work together to achieve dual-mode upconverting (UC) downconverting (DC) luminescence upon low heat effect 800-nm excitation. Nd3+, Yb3+, Er3+ tri-doped NaGdF4:Nd,Yb,Er UC layer [NIR (800 nm)-to-Visible (540 nm)] with a constitutional efficient 800 nm excitable property achieved for in-vitro bioimaging auto-fluorescence...
Upconversion nanoparticles (UCNPs) have shown considerable promises in many fields; however, their low upconversion efficiency is still the most serious limitation of applications. Herein, we report for first time that homogeneous doping approach based on successive layer-by-layer method can greatly improve UCNPs. The quantum yield as high 0.89 ± 0.05% realized NaGdF4:Yb,Er/NaYF4 UCNPs, which nearly 2 times higher than heterogeneous UCNPs (0.47 0.05%). influences spatial distributions and...
Lanthanide-doped upconversion nanoparticles (UCNPs) mediate nitric oxide uncaging from Roussin's black salt anion Fe4S3(NO)7− using NIR light a simple diode laser operating continuously at 980 nm. This result offers new paradigm for applications of multi-photon absorption in the therapeutic delivery NO.
Abstract Optical multiplexing plays an important role in fields ranging from advanced biological assays to security. However, conventional codes based on fluorescent color and intensity are limited spectral overlap background interference. Herein, we present a new concept by manipulating the luminescence emission decay lifetimes of upconversion nanoparticles (τ λ ‐UCNPs) separately for first time through designing core/multi‐shell structure controlled energy relay method. This color/lifetime...
Abstract Realizing a high color rendering index (CRI) in Ce:LuAG transparent ceramics (TCs) with desired thermal stability is essential to their applications white LEDs/LDs as converters. In this study, based on the scheme of configuring red component by Cr 3+ doping, an efficient spectral regulation was realized Ce,Cr:LuAG TCs. A unilateral shift phenomenon could be observed both photoluminescence (PL) and excitation (PLE) spectra By constructing TC-based LED/LD devices remote mode,...
Abstract Flexible and air‐stable phototransistors are highly demanded for wearable near‐infrared (NIR) image sensors. However, advanced NIR sensors via low‐cost, solution‐based processes remained a challenge. Herein, high‐performance inorganic–organic hybrid achieved based on solution processed n‐type metal oxide/polymer semiconductor heterostructures of In 2 O 3 /poly{5,5′‐bis[3,5‐bis(thienyl)phenyl]‐2,2′‐bithiophene‐3‐ethylesterthiophene]} (PTPBT‐ET). The /PTPBT‐ET phototransistor combines...
Abstract Novel β‐NaGdF 4 /Na(Gd,Yb)F :Er/NaYF :Yb/NaNdF :Yb core/shell 1/shell 2/shell 3 (C/S1/S2/S3) multi‐shell nanocrystals (NCs) have been synthesized and used as probes for in vivo imaging. They can be excited by near‐infrared (800 nm) radiation emit short‐wavelength infrared (SWIR, 1525 radiation. Excitation at 800 nm falls into the “biological transparency window”, which features low absorption water heat generation is considered to ideal excitation wavelength with least impact on...
The presence of manganese ions (Mn2+) in Yb/Er-co-doped nanomaterials results suppressing green (545 nm) and enhancing red (650 upconversion (UC) emission, which can achieve single-red-band emission to enable applications bioimaging drug delivery. Here, we revisit the tunable multicolor UC a single Mn2+-doped β-NaYF4:Yb/Er microcrystal is synthesized by simple one-pot hydrothermal method. Excited 980 nm continuous wave (CW) laser, color β-NaYF4:Yb/Er/Mn microrod be tuned from as doping Mn2+...
An efficient green phosphor, Ba 2 MgSi O 7 :Eu 2+ , was prepared by a solid‐state reaction. Excited 350–420 nm light, the phosphor shows strong and broad emission band centering at 505 nm. The concentration quenching mechanism verified to be dipole–dipole interaction critical energy‐transfer distance confirmed as around 20 Å both calculated crystal structure method experimental spectral method. This low thermal‐quenching property with an activation energy of 0.677 eV. Light‐emitting diodes...
Amide proton transfer (APT) imaging has recently emerged as an important contrast mechanism for magnetic resonance (MRI) in the field of molecular and cellular imaging. The aim this study was to evaluate feasibility APT detect cerebral abnormality patients with Alzheimer's disease (AD) at 3.0 Tesla.Twenty AD (9 men 11 women; age range, 67-83 years) 20 age-matched normal controls (11 9 63-82 underwent traditional MRI examination on a Tesla system. ratio asymmetry (MTR asym ) values 3.5 ppm...
Transparent ceramics (TCs) with high quantum efficiency and excellent thermal stability are essential for the applications in high-power remote excitation white light-emitting diode or laser (LED/LD) lighting devices as color convertors.
Achieving intense nearly white upconversion emission from a single β-NaYF<sub>4</sub>:Yb/Er microcrystal <italic>via</italic> saturated excitation.
We described a wavelength locked and spectral narrowed high-power diode laser with Faraday anomalous dispersion optical filter (FADOF). By an external cavity 85Rb FADOF, the central of was precisely to Rb resonance D2 line. The bandwidth from free-running 4 nm 0.002 (1.2 GHz, FWHM). At 4.9 A maximal driven current, produced continuous wave (CW) output 18 W efficiency 80%, either current or temperature had no impact on laser. cell works well without any damage under long-time running. This...
The diode-pumped metastable rare gas laser (DPRGL) is showing potential for high-power operation. A key issue in developing this concept to produce high-density metastables a large volume. To achieve goal, we propose new, the best of our knowledge, architecture by extracting power from plasma jet. In scheme, discharge and gain regions are separated, avoiding negative effects discharges confined regions. jet-type Ar demonstrated with 466-mW output 33% slope efficiency. volume can be increased...
The pulse energy and average power are two long-sought parameters of femtosecond lasers. In the fields nonlinear-optics strong-field physics, they respectively play role to unlock various nonlinear processes provide enough photon fluxes. this paper, a high-energy high-power Yb:CALGO regenerative amplifier with 120 fs width is reported. This high-performance can work high stability in large tuning range repetition rates. Varying rate from 3 180 kHz, maximum output 36 W up 4.3 mJ,...
Diode-pumped metastable rare gas lasers are showing their potential for high-energy laser systems with intensive investigations carried out to understand lasing characteristics. Here, we demonstrated pulsed of a diode-pumped argon based on DC glow discharge in and helium mixtures different voltages pressures. A transient rate equation model was established solved explain the cause our experiment. The insufficient production atoms (1s5) slow transfer 1s4 state plasma during process were found...
Photon upconversion (UC) based on self-sensitization of lanthanide-doped nanocrystals is great importance for biological and photonic applications. Here, we report tunable multicolor display sensitive temperature sensing in the erbium-doped CaF 2 (UCNCs) codoped with Tm 3+ ions. Under excitation 980, 808 1532 nm lasers, luminescence (UCL) color these self-sensitized UCNCs can be manipulated from green to red efficiently red-to-green (R/G) UC intensity ratio promoted remarkably as doping ions...
We have experimentally investigated the kinetics of a diode-pumped metastable Ar laser by simultaneously monitoring population evolution 1s5 and 1s4 states during lasing. A comparison between two cases with pump on off revealed cause for transition from pulsed to CW The depletion atoms was responsible lasing phenomenon, while increasing duration density resulted in Furthermore, accumulation state observed.