A5100449859- Plasmonic and Surface Plasmon Research
- Photonic and Optical Devices
- Metamaterials and Metasurfaces Applications
- Orbital Angular Momentum in Optics
- Advanced Antenna and Metasurface Technologies
- Perovskite Materials and Applications
- Photonic Crystals and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced Fiber Optic Sensors
- Strong Light-Matter Interactions
- 2D Materials and Applications
- Thermal Radiation and Cooling Technologies
- Topological Materials and Phenomena
- Innovative Microfluidic and Catalytic Techniques Innovation
- Graphene research and applications
- Metal Extraction and Bioleaching
- Optical Coatings and Gratings
- Extraction and Separation Processes
- Nanoplatforms for cancer theranostics
- Optical Wireless Communication Technologies
- Conducting polymers and applications
- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Quantum and electron transport phenomena
- Thin-Film Transistor Technologies
Beijing University of Chemical Technology
2020-2025
Collaborative Innovation Center of Advanced Microstructures
2020-2024
Nanjing University
2020-2024
Nanjing Forestry University
2024
Central South University
2019-2024
Xi'an University of Science and Technology
2024
Institute of Oceanographic Instrumentation
2024
Shandong Academy of Sciences
2024
Yangtze University
2024
Qilu University of Technology
2024
We report the direct observation of Landau quantization in Bi2Se3 thin films by using a low-temperature scanning tunneling microscope. In particular, we discovered zeroth level, which is predicted to give rise half-quantized Hall effect for topological surface states. The existence discrete levels (LLs) and suppression LLs impurities strongly support 2D nature These observations may eventually lead realization quantum insulators.
Exquisite polarization control using optical metasurfaces has attracted considerable attention thanks to their ability manipulate multichannel independent wavefronts with subwavelength resolution. Here we present a new class of metasurface optics, which enables imposition two arbitrary and amplitude profiles on any pair orthogonal states polarization. The implementation method involves polarization-dependent interference mechanism achieved by constructing composed an array nanoscale...
Achromatic metalens composed of arrays subwavelength nanostructures with spatially varying geometries is attractive for a number optical applications. However, the limited degree freedom in single layer achromatic metasurface design makes it difficult to simultaneously guarantee sufficient phase dispersion and high diffraction efficiency, which restricts bandwidth efficiency metalens. Here we propose demonstrate diffraction-limited focusing capability at wavelength ranging from 1000 nm 1700...
Spiral phase contrast imaging and bright-field are two widely used modes in microscopy, providing distinct morphological information about objects. However, conventional microscopes always unable to operate with these at the same time need additional optical elements switch between them. Here, we present a microscopy setup that incorporates dielectric metasurface capable of achieving spiral synchronously. The not only can focus light for diffraction-limited but also perform two-dimensional...
High-quality Sb2Te3 films are obtained by molecular beam epitaxy on a graphene substrate and investigated in situ scanning tunneling microscopy spectroscopy. Intrinsic defects responsible for the natural p-type conductivity of identified to be Sb vacancies Sb(Te) antisites agreement with first-principles calculations. By minimizing defect densities, coupled transfer doping substrate, Fermi level thin can tuned over entire range bulk band gap. This establishes necessary condition explore...
Advanced textiles made of macroscopic fibers are usually prepared from synthetic fibers, which have changed lives over the past century. The shortage petrochemical resources, however, greatly limits development textile industry. Here, a facile top-down approach for fabricating wood applications (wood-textile fibers) comprising aligned cellulose nanofibers directly natural via delignification and subsequent twisting is demonstrated. Inherently well retained, while microchannels in delignified...
Atomically flat thin films of topological insulator Bi2Se3 have been grown on double-layer graphene formed 6H–SiC(0001) substrate by molecular beam epitaxy. By a combined study reflection high energy electron diffraction and scanning tunneling microscopy, we identified the Se-rich condition temperature criterion for layer-by-layer growth epitaxial films. The as-grown without doping exhibit low defect density 1.0±0.2×1011/cm2, become bulk at thickness ten quintuple layers, as revealed in situ...
In this paper, three Fano resonances based on different physical mechanisms are theoretically and numerically investigated in a plasmonic resonator system, comprised of two circular cavities. And the multimode interference coupled mode theory (MICMT) including coupling phases is proposed to explain system. According MICMT, one originates from between resonant modes resonator, other induced by resonators. Mode degeneracy removed when symmetry system broken, thereby emerging third kind...
In this paper, an asymmetric plasmonic structure composed of two MIM (metal-insulator-metal) waveguides and rectangular cavities is reported, which can support triple Fano resonances originating from three different mechanisms. And the multimode interference coupled mode theory (MICMT) including coupling phases proposed based on single (CMT), used for describing explaining multiple resonance phenomenon in resonator systems. Just because originate mechanisms, each be tuned independently or...
Lignin, as an abundant aromatic biopolymer in plants, has great potential for medical applications due to its active sites, antioxidant activity, low biotoxicity, and good biocompatibility. In this work, a simple ecofriendly approach lignin fractionation modification was developed improve the antitumor activity of lignin. The fraction KL-3 obtained by gradient acid precipitation at pH = 9–13 showed cytotoxicity. Furthermore, cell-feeding after additional structural modifications such...
Inspired by natural photosynthesis, exploring high-efficiency S-scheme heterojunction photocatalysts, especially with all-organic ones, for CO2 reduction is of great significance to tackle energy and environment issues. Herein, the dimension-matched perylene diimide/graphene-g-C3N4 (PDI/G-CN) nanosheet heterojunctions have been successfully constructed as an efficient full-spectrum responsive photocatalyst converting into CO CH4 16-time improvement compared pristine CN nanosheets. On basis...
Electrical conductivity and dielectric parameters are general inherent features of materials. Controlling these characteristics through applied bias will add a new dimension to regulate the dynamic response smart Here, fascinating electrical transport behavior is observed in topological insulator (TI) Bi2 Te3 nanorods, which play vital role intelligent materials or devices as unit for information reception, processing feedback. The nanorod aggregates exhibit monotonic resistance voltage,...
Optical analog image processing technology is expected to provide an effective solution for high-throughput and real-time data with low power consumption. In various operations, optical spatial differential operations are essential in edge extraction, compression, feature classification. Unfortunately, existing methods can only perform low-order or selectively a particular high-order operation. Here, we propose experimentally demonstrate Bessel vortex modulated metalens composed of single...
A plasmonic resonator system composed of a metal-insulator-metal waveguide coupled with disk and ring cavity was proposed to produce double Fano resonances, which resulted from the coupling between narrow discrete resonances broad spectrum resonator. Based on structure, end-coupled cavities are added form new systems, can support triple quadruple multiple be tuned semi-independently by changing parameters cavities. These characteristics offer flexibility in design highly integrated circuits....
Because of unique superiorities planar optical devices based on metalens manipulating amplitude, phase, polarization, wavelength incident light, metalenses have great prospects to replace traditional catadioptric components, especially in imaging and optoelectronic integration. However, the research has focused visible or near-infrared past few years little attention was paid long-wavelength infrared metalens. Here, we demonstrate largest aperture, high numerical polarization-independent...
A coupled plasmonic resonator system is investigated by both the finite element method (FEM) and multimode interference coupled-mode theory (MICMT). The made up of a cross rectangular cavity on two metal-insulator-metal (MIM) waveguides separated metal baffle. asymmetric in structure induces an additional Fano resonance transmission spectrum, which only single arises consisted symmetric cross-rectangular cavities. positions double resonances spectrum can be manipulated independently changing...
Drug-resistant bacterial infection is a global threat to public health due the high mobility of population. Novel therapy methods have been intensively studied for eradication antibiotic-resistant bacteria, including photothermal treatment, which has established outstanding killing efficiencies under laser radiation, and superhydrophobic surfaces exhibited excellent antifouling properties. However, an effective, scalable, affordable bactericidal coating eliminating drug-resistant bacteria...
Metasurfaces have recently emerged as a crucial tool because they achieve spherical-aberration-free focusing when exposed to normal incident light. Nevertheless, these metasurfaces often exhibit considerable coma subjected oblique light, thereby limiting their imaging field of view. In light this, our study presents the design and an experimental demonstration polarization-insensitive, large-field-of-view metalens that uses silicon metasurface. The is specifically tailored long-wavelength...
Quasibound states in the continuum (qBICs) have aroused much attention as a feasible stage to investigate optical strong coupling due their extremely high-quality factors (Q-factors) and extraordinary electromagnetic field enhancement. However, current demonstrations of based on qBICs primarily focused visible spectral range, while research near-infrared (NIR) regime remains scarce. In this work, we design nanograting metasurface supporting Friedrich–Wintgen bound (FW BICs). We demonstrate...