A5100411218- Advanced Fiber Laser Technologies
- Laser-Matter Interactions and Applications
- Photonic Crystal and Fiber Optics
- Magnetic properties of thin films
- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Solid State Laser Technologies
- Magnetic and transport properties of perovskites and related materials
- 2D Materials and Applications
- Laser-Plasma Interactions and Diagnostics
- Advanced Condensed Matter Physics
- Electrospun Nanofibers in Biomedical Applications
- Topological Materials and Phenomena
- Photorefractive and Nonlinear Optics
- Electronic and Structural Properties of Oxides
- Optical Network Technologies
- Multiferroics and related materials
- Magneto-Optical Properties and Applications
- Heusler alloys: electronic and magnetic properties
- Orbital Angular Momentum in Optics
- Advanced Optical Sensing Technologies
- ZnO doping and properties
- Semiconductor Lasers and Optical Devices
- Scoliosis diagnosis and treatment
- Optical Imaging and Spectroscopy Techniques
Nanjing University
2015-2025
Spintronics Research Network of Japan
2025
Columbia University
2014-2024
Hubei Normal University
2023-2024
Collaborative Innovation Center of Advanced Microstructures
2015-2023
Nanjing Drum Tower Hospital
2022-2023
Guangxi Research Institute of Chemical Industry
2023
Dalian Polytechnic University
2023
Nanjing Medical University
2023
University of York
2021-2022
Abstract We demonstrated a mode-locked thulium/holmium (Tm/Ho) fiber laser continuously tunable across 200 nm (from 1860 to 2060 nm), which the best of our knowledge represents widest tuning range ever achieved for passively oscillator. The combined use broadband carbon nanotube (CNT) saturable absorber and diffraction grating mirror ensures ultra-broad range, superb stability repeatability, makes highly practical source spectroscopy, imaging optical communications. emits <5 ps pulses...
We designed a miniature laser speckle imager that weighs ∼20 g and is 3.1-cm high for full-field high-resolution imaging of cerebral blood flow (CBF) in freely moving animals. Coherent light illuminates the cortex through multimode optical fiber bundle fixed onto supporting frame imager. The reflected lights are then collected by macrolens system imaged CMOS camera at rate (50 fps). Using this imager, we achieve spatiotemporal resolution contrast CBF animals real time.
In this Letter, the transient nonlinear absorption of three-dimensional (3D) topological Dirac semimetal Cd3As2 thin film was characterized in near-infrared band. By performing broadband pump–probe measurements, we experimentally proved that molecular beam epitaxy (MBE) grown exhibits strong and tunable saturable effects across 1–2 μm. further inserting into cavities Tm- Er-doped fiber lasers, obtained stable mode-locked operations at 1.96 1.56 Our results establish is a promising absorber...
Chiral magnets have recently gained recognition as ideal hosts for topological spin textures, showing significant promise applications in next-generation spintronic devices. However, chiral are still scarce, and their transport properties been rarely explored. Here, a magnet, Cr1/3NbS2, has synthesized, its magnetic systematically investigated. A high magnetoresistance sensitivity of 52.5%/T is achieved, phase diagram helimagnetic (CHM), soliton lattice (CSL), forced ferromagnetic (FFM)...
Polarization feedback control of single-photon pulses has been achieved in long-distance fibers for more than 10 hours, which facilitated "one-way" polarization-encoded quantum key distribution with long-term stabilities. Experimental test polarization encoding 75 km demonstrated that the transformation could be controlled to provide a typical QBER (3.9+/-1.5)% within operation 620 minutes.
Mode-locked oscillators with highly tunable output characteristics are desirable for a range of applications. Here, custom-made filter, we demonstrate carbon nanotube (CNT) mode-locked thulium fiber laser widely wavelength, spectral bandwidth, and pulse duration. The demonstrated laser's wavelength tuning reached 300 nm (from 1733 to 2033 nm), which is the widest-ever that was reported rare-earth ion doped in near-infrared. At each duration can be regulated by changing filter's bandwidth....
Two-dimensional (2D) van der Waals ferromagnetic materials have attracted intense attention due to their potential impact on both fundamental and applied research studies. Recently, a new 2D ferromagnet CrTe2, prepared by mechanical exfoliation or chemical vapor deposition, has gained interest its novel magnetic properties. In this work, high quality CrTe2 epitaxial thin films were GaAs (111)B substrates using solid source molecular beam epitaxy, with the thickness varying from 35 4...
Abstract The magnetic type-II Weyl semimetal (MWSM) Co 3 Sn 2 S has recently been found to host a variety of remarkable phenomena including surface Fermi-arcs, giant anomalous Hall effect, and negative flat band magnetism. However, the dynamic properties remain relatively unexplored. Here, we investigate ultrafast spin dynamics crystal using time-resolved magneto-optical Kerr effect reflectivity spectroscopies. We observe transient magnetization behavior, consisting spin-flipping dominated...
WTe2 is a unique material in the family of transition metal dichalcogenides and it has been proposed as candidate for type-II Weyl semimetals. However, thus far, studies on optical properties this emerging have significantly hindered by lack large-area, high-quality materials. Here, we grow centimeter-scale, highly crystalline ultrathin film (∼35 nm) pulsed laser deposition technique. Broadband pump-probe spectroscopy (1.2–2.5 μm) reveals peculiar ultrafast response where an initial...
Abstract Charge transfer in perovskite oxide heterostructures could break the delicate balance among charge, spin, orbital and lattice order at interface, producing exotic phenomena that cannot be observed bulk materials. Here, opposite interfacial charge directions are SrIrO 3 /NdNiO /LaNiO d /5 heterostructures. This is accompanied with an inverse change of Ni e g polarization Ni-O pd hybridization across by stretching/compressing out-of-plane bond internal electrical field due to electron...
We demonstrated an efficient single-photon frequency upconversion system for the infrared photons at 1.06 μm with ultralow background counts. By pumping a longer wavelength than that of signal, counts caused by pump-induced parametric fluorescence in nonlinear crystal were reduced markedly. achieved so far lowest noise ∼150/s near unity conversion efficiency.
Flexible conductive films with high surface conductivity, broadband optical absorption, and excellent chemical thermal stabilities are desired for optoelectronic applications. Herein, a facile layer-by-layer vacuum filtration method is presented to fabricate sandwich-structured film silver nanowires (AgNWs) that adhere the of cellulose nanofibers (CNF)/graphene oxide (GO) hybrid membranes. The middle CNF/GO layer offers flexible stable substrate AgNWs form condensed stratiform structure....
We introduce a calcium carbonate birefringent crystal into an Er-fiber laser mode-locked by saturable absorber, where dual-comb ultrashort pulses with orthogonal polarization have been obtained. The two pulse trains from the exhibit contrast ratios of 30 dB and 20 dB, indicating that mode-locking is due to polarization-multiplexing mechanism. central wavelengths 1564.41 nm 1564.51 nm, durations 825 fs 805 respectively. optical spectra asynchronous are nearly identical, so output could be...
Novel biodegradable multiblock copolymers of [PCL-b-P(THF-co-CL)]m with PCL fractions 53.3 and 88.4 wt % were prepared by Janus polymerization ε-caprolactone (CL) tetrahydrofuran (THF). Their electrospun mats obtained optimized parameters containing bead-free nanofibers whose diameters between 290 520 nm. The mechanical properties the nanofiber scaffolds measured showing tensile strength strain at break 8–10 MPa 123–161%, respectively. Annealing improved their samples increased to 10–13...
We have studied the broadband nonlinear optical properties of layered semiconductor Bi <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O Se prepared by modified Bridgman method. The saturable absorber exhibits a modulation depth 12.2%, nonsaturable loss 62.2%, and intensity 26 MW/cm <sup xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> at 1.55 μm. With respect to 2-μm band, shows 9.1%, 71%, 44.2 . In addition, mode-locked Er-fiber...