A5016129315- Graphene research and applications
- Shape Memory Alloy Transformations
- Boron and Carbon Nanomaterials Research
- Photonic and Optical Devices
- Advanced Fiber Optic Sensors
- Plasmonic and Surface Plasmon Research
- Nuclear Materials and Properties
- Luminescence Properties of Advanced Materials
- Quantum and electron transport phenomena
- Ga2O3 and related materials
- ZnO doping and properties
- Welding Techniques and Residual Stresses
- Fusion materials and technologies
- Ion-surface interactions and analysis
- Advanced Fiber Laser Technologies
- Catalytic Processes in Materials Science
- Metal and Thin Film Mechanics
- GaN-based semiconductor devices and materials
- Diamond and Carbon-based Materials Research
- 2D Materials and Applications
- Nuclear materials and radiation effects
- Nuclear Physics and Applications
- Superconductivity in MgB2 and Alloys
- Optical Network Technologies
- Aerodynamics and Acoustics in Jet Flows
Jilin University
2023
State Key Laboratory of Automotive Simulation and Control
2023
University of Electronic Science and Technology of China
2006-2016
Aarhus University
2015
National Engineering Research Center of Electromagnetic Radiation Control Materials
2015
Kyoto University
1984
Graphene based new physics phenomena are leading to a variety of stimulating graphene-based photonic devices. In this study, the enhancement surface evanescent field by graphene cylindrical cladding is observed, for first time, using graphene-coated microfiber multi-mode interferometer (GMMI). It found theoretically and experimentally that light transmitting in fiber core efficiently dragged graphene, hence significantly enhancing fields, subsequently improving sensitivity hybrid waveguide....
The electronic and magnetic properties of a BN sheet doped with 3d transition metals (Fe, Co Ni) have been investigated using ab initio calculations. Our calculations show many interesting physical in metal-doped sheet. A Fe-doped is half-metal the moment 2.0 micro(B), Co-doped becomes narrow-gap semiconductor 1.0 micro(B). However, no induced on Ni-doped sheet, which has same band gap as pristine Furthermore, Fe atom easily forms an isolated particle while Ni atoms are likely to form...
In this Letter, a graphene-coated D-shaped fiber (GDF) chemical gas sensor is proposed and demonstrated. Taking advantage of both the graphene-induced evanescent field enhancement in-fiber multimode interferometer, GDF shows very high sensitivity for polar molecule adsorptions. An extinction ratio up to 28 dB within free spectrum range ∼30 nm in transmission achieved. The maximum sensitivities NH3 H2O detections are ∼0.04 ∼0.1 ppm, respectively. A hybrid sensing scheme with such compactness,...
A graphene-coated microfiber (GCM)-based hybrid waveguide structure formed by wrapping monolayer graphene around a with length of several millimeters is pumped nanosecond laser at ∼1550 nm, and multi-order cascaded four-wave-mixing (FWM) effectively generated. By optimizing both the detuning pump power, such GCM device high nonlinearity compact size would have potential for wide range FWM applications, as phase-sensitive amplification, multi-wavelength filter, all-optical regeneration...
Using density functional calculations, we investigate the geometries, electronic structures and magnetic properties of hexagonal BN sheets with 3d transition metal (TM) nonmetal atoms embedded in three types vacancies: VB, VN, VB+N. We show that some configurations, except TM VN vacancy, are stable yield interesting phenomena. For instance, band gaps moments can be tuned depending on dopant species vacancy type. In particular, embedment such as Cr VB+N, Co Ni VB leads to half-metallic for...
Graphene-based silica fiber-optic sensors, with high sensitivity, fast response, and low cost, have shown great promise for gas sensing applications. In this letter, by covering a monolayer of p-doped graphene on D-shaped microstructured polymer fiber Bragg grating (FBG), we propose demonstrate novel biochemical probe sensor, the graphene-based FBG (GDPFBG). Due to surface evanescent field enhancement, sensor shows sensitivity detect surrounding parameters. By monitoring peak locations...
Intriguing electronic and magnetic properties of boron nitride (BN) layer with noble metal (Pd, Pt, Ag Au) doping are obtained by first-principles calculations. Adsorbed Pd (or Pt) reduces the bandgap BN sheet owing to induction impurity states. The unpaired electrons in Au)-adsorbed Pt)-substituted layers polarized, thus, exhibit a moment 1.0 μB, leading these configurations be semiconductors. half-metallic feature Ag-substituted layer, along delocalization spin states, renders this...
The effects of using different interatomic potentials in molecular dynamics (MD) simulations the formation He-vacancy clusters within displacement cascades α-Fe are investigated two sets potentials. Simulations produced by primary knock-on atoms energy Ep=1–20keV were performed containing a concentration substitutional He varying from 1to5at.% at an irradiation temperature 100K. Although on nucleation induced relatively small, number and size significantly for employed this study. Thus,...
First principles density functional calculations are used to study the uniaxial strain effects on energy band structures of single- and multi-walled boron nitride nanotubes. Simulation results show that tensile induces a slight decrease in gaps, while small large compressive strains induce increases decreases respectively. The maximum change gap is ~0.5 eV. all nanotubes not sensitive strain, which means could be blue UV light-emitting devices under strain.
Using density functional theory, we consider the adsorption of C on graphene, which gives rise to many interesting phenomena. A single-C at bridge site shows a clearly covalent-bond feature with in metallic state occurs and magnetic moment 0.36 μ(B) was determined. For both-sided adsorption, is remarkably larger than that one-sided increases concentration up coverage 12.5%. High spin polarization obtained Fermi level indicates high degree passage preferred spin, important for developing filters.
In the non-destructive testing of ferromagnetic pipes based on remote field eddy currents, an array sensing coils is often used to detect local defects. While testing, image that obtained by exhibits a ghost-image, which originates from both transmitter and passing over same defects in pipes. Ghost-images are caused transmitters lead undesirable assessments order remove ghost-images, two pickup coaxially set each other field. Due time delay between differential signals tested coils, Wiener...
Using density functional theory, a series of calculations structural and electronic properties Si-substituted graphene were conducted. Through substituting C atoms by Si on in the present study, we found that band gap can be continuously tuned with differently substitutional concentration. To utilize such substitution-induced changes, proposed special design to fabricate graphene-based quantum well device.
A graphene coated D-shaped fiber chemical-gas sensor demonstrated, with maximum sensitivity ~0.04ppm and ~0.1ppm for NH3 H2O gas detections, respectively. This work may pave a way to explore based lab-on-fiber devices.
We demonstrate a graphene-based passively Q-switched erbium-doped fiber laser. The laser produces stable pulses with typical pulse width of ~ 9.0 μs at repetition rate ranging from 8.3 to 12.5 kHz.