A5081052589- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- 2D Materials and Applications
- Copper-based nanomaterials and applications
- Topological Materials and Phenomena
- Optical Systems and Laser Technology
- Graphene research and applications
- Advanced biosensing and bioanalysis techniques
- MXene and MAX Phase Materials
- Optical Wireless Communication Technologies
- Astronomical Observations and Instrumentation
- Advanced Condensed Matter Physics
- Ga2O3 and related materials
- Perovskite Materials and Applications
- Advanced Photocatalysis Techniques
- ZnO doping and properties
- Advanced Measurement and Detection Methods
- Semiconductor materials and interfaces
- Inertial Sensor and Navigation
- Electronic and Structural Properties of Oxides
- Quantum and electron transport phenomena
- Electrochemical sensors and biosensors
- Electrochemical Analysis and Applications
- Photorefractive and Nonlinear Optics
- Molecular Junctions and Nanostructures
Beijing Institute of Technology
2015-2025
Xi'an Institute of Optics and Precision Mechanics
2015-2025
Quantum (Australia)
2025
Lanzhou University of Finance and Economics
2024
University of Chinese Academy of Sciences
2015-2024
Chinese Academy of Sciences
2015-2024
China Academy of Space Technology
2020-2024
Tianjin haihe hospital
2020-2023
Tianjin University
2023
Anhui Agricultural University
2023
As a handicap for passive mode-locked lasers to operate stably long time, the undesirable damage threshold of saturable absorption devices means that it is difficult maintain normal operation state under irradiation brought by ultrashort pulses. To reduce probability when interact with an ultrafast laser, some technologies have been developed resist high-energy laser will also increase difficulty construction at same time. In this paper we put forward new research idea improve low-damage...
A new two-dimensional material, the C$_2$N holey 2D (C$_2$N-$h$2D) crystal, has recently been synthesized. Here we investigate strain effects on properties of this material by first-principles calculations. We show that is quite soft with a small stiffness constant and can sustain large strains $\geq 12\%$. It remains direct gap semiconductor under bandgap size be tuned in wide range as 1 eV. Interestingly, for biaxial strain, band crossing effect occurs at valence maximum close to 8\%...
Fully indium-free flexible Ag nanowires/ZnO:F composite transparent conductive electrodes with high haze can improve the perovskite solar cell efficiency.
Abstract Photosensing and energy harvesting based on exotic properties of quantum materials new operation principles have great potential to break the fundamental performance limit conventional photodetectors solar cells. Weyl semimetals demonstrated novel optoelectronic that promise applications in photodetection arising from their gapless linear dispersion Berry field enhanced nonlinear optical effect at vicinity nodes. In this work, we demonstrate robust photocurrent generation edge T d...
Weyl semimetals have been classified into type-I and type-II with respect to the geometry of their Fermi surfaces at points. Here, we propose a new class semimetal, whose unique surface contains two electron or hole pockets touching multi-Weyl point, dubbed as type-III semimetal. Based on first-principles calculations, first show that quasi-one-dimensional compound (TaSe4)2I is semimetal larger chiral charges. can support four-fold helicoidal states remarkably long arcs (001) surface....
Saturable absorption may be induced at critical pumping power by nonlinear optical effects of nanomaterials, thereby making it possible to generate a high-power ultrafast laser. Recently, Bi4Br4 is theoretically predicted member topological insulators and expected promising candidate for saturable absorbers (SAs). We show here that features large modulation depth 42.3%. The Bi4Br4-based SA enables mode-locking operation the near-infrared range, as demonstrated 1.5 μm fiber laser with...
Intelligent materials with adaptive response to external stimulation lay foundation integrate functional systems at the material level. Here, experimental observation and numerical simulation, we report a delicate nano-electro-mechanical-opto-system naturally embedded in individual multiwall tungsten disulfide nanotubes, which generates distinct form of in-plane van der Waals sliding ferroelectricity from unique combination superlubricity piezoelectricity. The enables programmable...
Copper (I) iodide (CuI) films are grown on glass substrates with a direct vacuum thermal evaporation method, and the effect of substrate temperature their photoluminescence transparent conductive properties is discussed. The X-ray diffraction (XRD) measurement identifies polycrystalline CuI film has γ-phase (111) preferential growth direction. When optimised at 120 °C, average transmittance about 90% in wavelength range 410–1500 nm. electrical measured by Hall show lowest resistivity 1.0 ×...
In this work, we have developed a modified way of mechanical exfoliation for making two-dimensional materials by introducing home-designed machine. Optical microscopy was employed to identify the thin-layer (mono- and few-layer) flakes primarily. To testify high efficiency our method, did simple statistical work on graphene WSe2. Further, used Raman spectroscopy Atomic Force Microscopy (AFM) characterize samples. The results indicated quality as-fabricated Finally, an technique working with...
We have studied low-temperature magnetoconductance and observed weak antilocalization in an AlSb/InAs/AlSb quantum-well structure. The spin-orbital field deduced from the data is found to be insensitive photoinduced changes carrier density, suggesting that interfacial-field-induced rather than crystal-field-induced spin splitting predominant cause of scattering. also find a significant enhancement scattering ZnTe/InAs/AlSb structures which can explained by structural asymmetry, thereby...
Flexible Cu<sub>2</sub>ZnSnS<sub>4</sub> (CZTS) solar cell with 3.82% conversion efficiency is prepared by co-electrodeposited method.
A conversion efficiency of 3.87% was achieved by using Reline as an electrolyte to co-electroplate Cu–Zn–Sn precursor thin films.
Great progress has been achieved in the research field of topological states matter during past decade. Recently, a quasi-1-dimensional bismuth bromide, Bi4Br4, predicted to be rotational symmetry-protected crystalline insulator; it would also exhibit more exotic properties under pressure. Here, we report thorough study phase transitions and superconductivity quasihydrostatically pressurized α-Bi4Br4 crystal by performing detailed measurements electrical resistance, alternating current...
The edges of layered materials have unique properties that substantially differ from the body regions. In this work, we perform a systematic Raman study various (MoS2, WS2, WSe2, PtS2, and black phosphorus). spectra feature newly observed forbidden modes, which are originally undetectable region. By selecting edge type polarization directions incident scattered light, all modes distinctly detected. Optical simulations show drastically distort electromagnetic fields both so light interacts...
We report the magnetization, electrical resistivity, specific heat measurements and band structure calculations of layered superconductor SnTaS$_2$. The experiments are performed on single crystals grown by chemical vapor transport method. resistivity magnetic susceptibility indicate that SnTaS$_2$ is a type-II with transition temperature $T_c = 3$ K. upper critical field ($H_{c2}$) shows large anisotropy for parallel to $ab$ plane ($H//ab$) $c$ axis ($H//c$), dependence $H_{c2}$ $H//ab$...
In recent years, low-dimensional materials have received extensive attention in the field of electronics and optoelectronics. Among them, photoelectric devices based on photoconductive effect a broad development space. contrast to positive photoconductivity, negative photoconductivity (NPC) refers phenomenon that conductivity decreases under illumination. It has novel application prospects optoelectronics, memory, gas detection, etc . this paper, we review reports about NPC systematically...
Bismuth bromide (α-Bi4Br4) can demonstrate various exotic topological states, including higher-order insulator with hinge states and quantum spin Hall helical edge states. To date, α-Bi4Br4 nanowires be obtained by using the exfoliation method from bulk. However, it is still a great challenge to efficiently prepare suitable for potential applications, e.g., saturable absorber in ultrafast pulsed fiber lasers. Here, we report controllable growth of thin films consisting via molecular beam...
Abstract The notion of topological insulators (TIs), characterized by an insulating bulk and conducting surface states, can be extended to higher-order (HOTIs) hosting gapless modes localized at the boundaries two or more dimensions lower than bulk. In this work, performing high-resolution angle-resolved photoemission spectroscopy (ARPES) measurements with submicron spatial spin resolution, we systematically investigate electronic structure texture quasi-one-dimensional (1D) HOTI candidate...