A5101802742- Luminescence Properties of Advanced Materials
- Luminescence and Fluorescent Materials
- Silicon Nanostructures and Photoluminescence
- Solid State Laser Technologies
- Nanowire Synthesis and Applications
- Nanoplatforms for cancer theranostics
- Radiation Detection and Scintillator Technologies
- Perovskite Materials and Applications
- Glass properties and applications
- Thin-Film Transistor Technologies
- Advanced Fiber Laser Technologies
- Gas Sensing Nanomaterials and Sensors
- Laser Design and Applications
- Optical Systems and Laser Technology
- Photonic and Optical Devices
- Advanced Optical Sensing Technologies
- Advanced Fiber Optic Sensors
- Laser-Matter Interactions and Applications
- Semiconductor materials and devices
- Ion-surface interactions and analysis
- MXene and MAX Phase Materials
- Inorganic Fluorides and Related Compounds
- Hydrology and Drought Analysis
- Optical properties and cooling technologies in crystalline materials
- Agriculture, Soil, Plant Science
Harbin Engineering University
2019-2022
Jilin University
2021
Harbin University
2021
State Key Laboratory on Integrated Optoelectronics
2021
Nanyang Technological University
2012
Shanxi Datong University
2010
Nanjing University
2010
Yong In University
2009
Guizhou University
2007-2008
Photothermal therapy (PTT) has been widely used for the treatment of various medical conditions due to their noninvasive and cost-effective advantages. However, light absorption scattering biosystem limit deep tissue applications conventional PTT probes. In this paper, we proposed sub-10 nm NaNdF4 nanocrystals with both incident emission wavelengths located at optical window. Under 800 laser excitation, maximum light-to-heat conversion efficiency these ultrasmall photothermal agents is...
Lifetime of lanthanide luminescence basically decreases with increasing the ambient temperature. In this work, we developed NaErF4 core–shell nanocrystals compensation lifetime variation Upconversion various emissions remains substantially unchanged as temperature, upon 980/1530 nm excitation. The concentrated dopants, leading to extremely strong interactions between them, are responsible for unique temperature-independent lifetime. Besides, upconversion mechanisms core-only and under 980...
Low-frequency inductively coupled plasma (ICP) has been widely used to deposit amorphous or microcrystalline Si thin films, but the intrinsic drawback namely ion bombardment effect limits its application in heterojunction solar cells. In this letter, we redesigned typical ICP and realized a remote deposition with suppressed effect. This system enables synthesis of high quality layers compact network hydrogen content (10.5%). By using system, achieved amorphous/crystalline silicon cells an...
Improving luminescence efficiency is of vital importance for applications rare-earth-doped upconversion materials. Herein, we present highly efficient nanocrystal, which brighter than the state-of-the-art Er3+/Yb3+ co-doped core-shell material, through Er3+ heavily doping and 1530 nm excitation. Moreover, characteristics mechanisms doped core nanocrystals their counterparts are investigated carefully.
We report the fabrication of low-dimensional structures by irradiation a laser on silicon sample and SiGe alloy sample. The physical mechanism forming kind hole-net structure could be explained with theory harmonic standing wave plasma. article has studied enhancement photoluminescence (PL) in porous SiGe. optimum condition preparing process is found to make stable which an intensive PL emission. effect emission cannot interpreted within quantum confinement (QC) alone. So model for...
Remotely monitoring and regulating temperature in a small area are of vital importance for hyperthermia therapy. Herein, we report ~11 nm NaErF4 nanocrystal as the ultra-small nanoheater, which is highly safe biological applications. Under 1530 photon excitation, upconversion intensity significantly enhanced compared to conventionally used 980 pumping source. Upconversion mechanisms discussed on basis power dependence measurements. Importantly, light-to-heat transformation efficiency through...
We proposed a novel energy cycling mechanism by introducing Yb<sup>3+</sup> as an reservoir to improve the Ln<sup>3+</sup> upconversion intensity. The key of is suppressing dissipation and/or facilitating ESA population.
Abstract The resulting interfacial stress in heteroepitaxial nanocomplex usually has negligible influence on its performance, but at high pressures (HP) the effect can be significantly amplified. In order to unravel underlying mechanism and search for quality pressure sensors, a simple object is employed, NaErF 4 @NaLnF (Ln = Y, Lu, Gd) Tm 3+ ‐doped derivatives, comparatively study of upconversion (UC) luminescence. Specifically, doping enhances greatly mechanosensitivity because anisotropic...
Particle size significantly affects the brightness of luminescent nanocrystals. Herein we firstly adopt a 1530 nm CW laser as optical heating source to increase particle Er3+ heavily doped nanocrystals, leading giant enhancement intensity. The advantages this method are mainly feature along facile route, with an ultrafast process, and low threshold power density. detailed mechanisms annealing carefully investigated. In addition, fluorescence intensity ratio behaviours using different...
An all-optical tunable whispering gallery mode (WGM) lasing from the liquid-filled hollow glass microsphere (LFHGM) is proposed and experimentally verified. The LFHGM-based microlaser prepared by injecting ${{\rm NaNdF}_4}/{\rm dye}$NaNdF4/dye co-doped liquid into HGM, WGM resonance obtained under excitation of a 532 nm pulse laser. Since high-efficiency absorption 793 continuous-wave laser NaNdF}_4}$NaNdF4 nanocrystals (NCs) can result in photothermal effect-induced effective refractive...
We propose and investigate an all-fiber thermo-optic modulator based on a side-polished twin-core fiber (TCF) Michelson interferometer (MI) coated with NaNdF 4 nanoparticles. The MI was fabricated by tapering the splicing point between TCF single mode (SMF). A short suspended core (SCF) is spliced to one of introduce fixed optical phase difference (OPD). photo-thermal material . Owing ohmic heating nanoparticles under 808 nm pump laser, effective refractive index polished changed, resulting...
The BaZnP2O7:Eu2+, Mn2+ phosphor was synthesized by high temperature solid state reaction. luminescence properties and the energy transfer between Eu2+ were investigated. emission bands of peaking at 380nm 670nm originated from 5d—4f transition which partly substituted Ba2+ sites 4T1(4G)—6A1(6S) occupying Zn2+ sites, respectively. dependence on their concentration With increasing dopant content, intensity observed to decrease, but simultaneously found increase. It is suggested this...
To date, color-tunable photon upconversion (UC) in a single nanocrystal (NC) still suffers from cumbersome structures. Herein, we prepared compact two-layer NC with bright and high-purity red green UC emission upon 980 1530 nm excitation, respectively. The effects of trace <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:msup> <mml:mi mathvariant="normal">T</mml:mi> mathvariant="normal">m</mml:mi> </mml:mrow>...
Amorphous SiC thin films with varying phases and compositions have been synthesized using a low frequency inductively coupled high density plasma source in hydrogen diluted methane (CH4) silane (SiH4) mixture. The optical electrical properties along the microstructures of are systematically investigated. feedstock gas ratio CH4/SiH4 leads to fluctuations bandgap, carbon content, transition Si–Si bonding structure from crystalline intermediate phase finally amorphous phase. Room temperature...
Biological probes facilitate optical imaging and disease diagnosis treatment. However, the large absorption scattering loss in tissue highly limit depth during application. In present research, an NIR-I bioprobing system, which utilizes Bessel beam to excite heavily doping nanocrystals, has been developed for deep applications. On one hand, capillary mode selection method generates excitation beam, lowering energy loss. other a strong harvest of NaYbF4:90%Nd nanocrystals enables effective...
Stimulated photoluminescence (PL) emission has been observed from an oxide structure of silicon when optically excited by a radiation 514nm laser. Sharp twin peaks at 694 and 692nm are dominated stimulated emission, which can be demonstrated its threshold behaviour linear transition intensity as function pump power. The is formed laser irradiation on annealing treatment. A model for explaining the proposed, in trap states interface between porous nanocrystal play important role.
The Domestic Spaceborne Lidar as a pivotal method in satellite remote sensing is introduced, including the development status and key technology. By analysing system design among weighted Chang’e-1, resource satellite, expectation of Development released.
Color-tunable upconversion luminescence has wide prospects for anti-counterfeiting and disease diagnosis/treatment. To date, achieving high-quality tunable red blue emissions using a single excitation wavelength remains formidable challenge, due to the large energy difference between photons. In this Letter, based on Tm3+ luminescence, dominant are generated upon 980-nm excitations short long pulse, respectively. The corresponding color tuning mechanisms investigated spectral observations....