A5100423481- Graphene research and applications
- Optical Coherence Tomography Applications
- Luminescence and Fluorescent Materials
- Diamond and Carbon-based Materials Research
- Luminescence Properties of Advanced Materials
- Carbon and Quantum Dots Applications
- Optical Polarization and Ellipsometry
- 2D Materials and Applications
- Photoacoustic and Ultrasonic Imaging
- Intraocular Surgery and Lenses
- Laser Material Processing Techniques
- GaN-based semiconductor devices and materials
- Laser Applications in Dentistry and Medicine
- Physics of Superconductivity and Magnetism
- Optical Imaging and Spectroscopy Techniques
- Semiconductor materials and devices
- bioluminescence and chemiluminescence research
- Optical properties and cooling technologies in crystalline materials
- Muscle metabolism and nutrition
- 3D IC and TSV technologies
- Graphene and Nanomaterials Applications
- Dental Anxiety and Anesthesia Techniques
- Nanofabrication and Lithography Techniques
- Silicon Carbide Semiconductor Technologies
- Advanced Fiber Laser Technologies
Hebei University
2022-2023
Rice University
2016-2021
Nanjing University
2013-2020
Chinese Academy of Sciences
2017-2019
Institute of Semiconductors
2017-2019
University of Chinese Academy of Sciences
2017-2019
Anhui Jianzhu University
2017
Hunan University
2011
Abstract Non‐contact ratiometric luminescence thermometry continues to gain popularity over decades due its fascinating features of high accuracy, fast response, and simplicity. In this regard, rational design optical thermometers with ultrahigh relative sensitivity low temperature resolution has become a cutting‐edge topic. Herein, intensity ratio thermometric method depending on the emission line at 698 nm (peak 1) bands 713 721 (peaks 2 3) Li 1.97 Zn 1.0292 Ge 3 O 8 :0.08%Cr 3+ is...
High-quality graphene scrolls with several possible conformations are designed using a facile microexplosion method under an ultrasonic reaction between MnO2 and H2O2. The as-obtained exhibit tubular structure. methodology successfully realizes the transformation from 2D material to nearly 1D material.
Atomically thin hexagonal boron nitride (h‐BN) is gaining significant attention for many applications such as a dielectric layer or substrate graphene‐based devices. For these applications, synthesis of high‐quality and large‐area h‐BN layers with few defects strongly desirable. In this work, the aligned growth millimeter‐size single‐crystal domains on epitaxial Ni (111)/sapphire substrates by ion beam sputtering deposition demonstrated. Under optimized conditions, up to 0.6 mm in edge...
Catalyst-free growth of wafer-scale h-BN few-layers is realized on sapphire substrates by the combination surface nitridation and N<sup>+</sup> sputtering.
Force production and maintenance in smooth muscle is largely controlled by myosin regulatory light chain (RLC) phosphorylation, which relies on a balance between Ca(2+)/calmodulin-dependent kinase (MLCK) phosphatase (MLCP) activities. MYPT1 the subunit of MLCP that biochemically inhibits activity via T694 or T852 phosphorylation vitro. Here we separately investigated contribution these two sites bladder muscles establishing single point mutation mouse lines, T694A T852A, found T694, but not...
Two-dimensional homogeneous h-BCN atomic layers with a full range of compositions were synthesized by ion beam sputtering deposition.
A 3D printing technique for manufacturing air-clad coherent fiber optic faceplates is presented. The custom G-code programming implemented on a fused deposition modeling (FDM) desktop printer to additively draw optical fibers using high-transparency thermoplastic filaments. printed faceplate consists of 20000 and achieves spatial resolution 1.78 LP/mm. Transmission loss crosstalk are characterized compared among the from four kinds transparent filaments as well different thicknesses....
A fiber-based snapshot imaging spectrometer was developed with a maximum of 31853 (~188 x 170) spatial sampling and 61 spectral channels in the 450nm-750nm range. compact, custom-fabricated fiber bundle used to sample object image at input create void spaces between rows output for dispersion. The built using multicore 6x6 block ribbons. To avoid overlap cores direction dispersion, we selected subset two alternative approaches; lenslet array photomask. calibrate >30000 samples system, rapid...
We report a method to promote photoluminescence emission in graphene materials by enhancing carrier scattering instead of directly modifying band structure multilayer reduced oxide (rGO) nanospheres. intentionally curl layers form nanospheres reducing with spherical polymer templates manipulate the scattering. These produce hot-carrier luminescence more than ten-fold improvement efficiency as compared planar nanosheets. With increasing excitation power, from exhibits abnormal spectral...
A prototype fiber-based imaging spectrometer was developed to provide snapshot hyperspectral tuned for biomedical applications. The system is designed in the visible spectral range from 400 700 nm compatibility with molecular applications as well satellite and remote sensing. An 81 × 96 pixel spatial sampling density achieved by using a custom-made fiber-optic bundle. design considerations fabrication aspects of fiber bundle are described detail. Through custom bundle, image scene interest...
We present a miniaturized ultrafast laser surgery probe with improved optics to deliver higher peak powers and enable surgical speeds than previously possible. A custom-built CaF 2 objective showed no evidence of the strong multiphoton absorption observed in our previous ZnS-based probe, enabling power delivery tissue surface for ablation. Kagome fiber delivered ultrashort pulses from high repetition rate objective, producing focal beam radius 1.96 μm covering 90×90 scan area. The maximum...
A miniature laser ablation probe relying on an optical fiber to deliver light requires a high coupling efficiency objective with sufficient magnification in order provide adequate power and field for surgery. diffraction-limited design is presented that utilizes refractive index zinc sulfide meet specifications while reducing the down two lenses. The has hypercentric conjugate plane side telecentric tissue end. Two versions of were built diamond lathe—a traditional cylindrical custom-tapered...
Femtosecond pump-probe spectroscopy is applied to identify transient optical signatures of phase transitions in optimally doped YBa2Cu3O7-{\delta} films. To elucidate the dynamics superconducting and pseudogap phases, slow thermal component removed from time-domain traces photo-induced reflectivity a high-flux regime with low frequency pulse rate. The rescaled data exhibit distinct separation abrupt changes at onsets TSC TPG excellent agreement transport data. Compared phase, response...
Abstract Long persistent luminescence (LPL) materials have been widely applied and investigated in the fields of night‐safe, bio‐fluorescent labeling, optical anti‐counterfeiting because their unique properties delayed luminescence. In this work, focus research is to significantly improve LPL Li 2 Zn 0.9992 Ge 3 O 8 :0.08%Cr 3+ by adjusting ratio + /Zn 2+ . On one hand, when :Zn < 2:1 (Li 1.97 1.0292 ), a deep‐red produced 650–900 nm band for more than 50 h, which 2.5 times longer that...
In this article, thermal performance of AC-LED light engine driven by segmented linear constant current was analyzed, based on the results transient temperature rise measurements using infrared camera. Compared with DC-LED, chips can be AC voltage without transformer and rectifier circuit. While, presented characteristics high efficiency, power factor, low total harmonic distortion, longer lifespan, higher reliability. This study investigated images within 300 seconds. The curve showed that...
We present a proof-of-principle prototype of fiber-based snapshot spectrometer to provide high spatial and spectral sampling for biomedical application such as cell signaling or diagnostics. An image is collected by custom fiber bundle then divided into groups with spaces in between dispersion. The later scaled down an taper (to scale the size allow smaller optical components), dispersed prism captured CCD camera. interpolation algorithm used locate each wavelength reconstruct channel....
Two-dimensional (2D) quantum magnetism is a paradigm in strongly correlated many-body physics. The understanding of 2D can be expedited by employing controllable simulator that faithfully maps 2D-spin Hamiltonians. simulators exhibit exotic phenomena such as frustrated and topological order used to show computational advantages. Many experimental platforms are being developed, including Rydberg atoms superconducting annealers. However, with trapped-ion systems, which showed the most advanced...
We present the development of a 5 mm, piezo-actuated, ultrafast laser scalpel that delivers upwards 1 μJ at target surface. Experiments show fast and effective surface ablation tissue tens microns deep.
We report a method to promote photoluminescence emission in graphene materials by enhancing carrier scattering instead of directly modifying band structure multilayer reduced oxide (rGO) nanospheres. intentionally curl layers form nanospheres reducing with spherical polymer templates manipulate the scattering. These produce hot-carrier luminescence more than ten-fold improvement efficiency as compared planar nanosheets. With increasing excitation power, from exhibits abnormal spectral...
We present an ultrafast laser surgery probe for bone tissue microsurgery. A custom miniaturized CaF<sub>2</sub> mitigated the strong multiphoton absorption observed in our previous ZnS-based design while providing tighter beam focusing over a larger ablation field-of-view. The objective produced waist radius of 1.71 μm covering 130×130 μm<sup>2 </sup>scan area, delivering fluences >8 J/cm<sup>2</sup> at surface 53% transmission efficiency. entire opto-mechanical system,...