A5077544786- Plasmonic and Surface Plasmon Research
- Photonic and Optical Devices
- Gold and Silver Nanoparticles Synthesis and Applications
- Optical Coatings and Gratings
- Diamond and Carbon-based Materials Research
- Metal and Thin Film Mechanics
- Nanofabrication and Lithography Techniques
- Advanced Fiber Optic Sensors
- Near-Field Optical Microscopy
- Semiconductor materials and devices
- Transition Metal Oxide Nanomaterials
- Nanowire Synthesis and Applications
- Topological Materials and Phenomena
- Nonlinear Optical Materials Studies
- Advanced Surface Polishing Techniques
- Silicon Carbide Semiconductor Technologies
- Force Microscopy Techniques and Applications
- Photonic Crystals and Applications
- Orbital Angular Momentum in Optics
- Thin-Film Transistor Technologies
- Thermal Radiation and Cooling Technologies
- Metamaterials and Metasurfaces Applications
- ZnO doping and properties
- Advanced Optical Sensing Technologies
- Collembola Taxonomy and Ecology Studies
University of Science and Technology of China
2015-2024
Hefei National Center for Physical Sciences at Nanoscale
2015-2024
Hefei University
2021
National Synchrotron Radiation Laboratory
2021
Microscale (United States)
2021
National University of Singapore
2019
Tianjin Medical University
2016
Purdue University West Lafayette
2013-2015
Optica
2013
We report a plasmonic refractive index sensor with wide measurement range based on periodic gold nanocubes coupled film. The theoretical sensing is 1.0–1.8. structure consists of two-dimensional gratings composed that both excite local surface plasmon resonance and stimulate propagating resonance. strong the multiple plasmons suitable for use in effectively reduces full width at half maximum peak. performance each resonant mode reflected spectrum discussed detail. highest sensitivity figure...
In this study, we experimentally prepared composite structures of 170 nm gold nanocube, poly(methyl methacrylate) (PMMA) spacer layers with different thicknesses, and 50 nm film as substrates for surface plasmons excitation surface-enhanced Raman scattering (SERS). The SERS spectra nanocube the structure were studied by using a 633 nm laser an source rhodamine 6G (R6G) probe molecule 5.625 µg/mL aqueous solution. It was found that produced much stronger signals than single structure....
Understanding the competition between superconductivity and other ordered states (such as antiferromagnetic or charge-density-wave (CDW) state) is a central issue in condensed matter physics. The recently discovered layered kagome metal AV3Sb5 (A = K, Rb, Cs) provides us new playground to study interplay of CDW state by involving nontrivial topology band structures. Here, we conduct high-pressure electrical transport magnetic susceptibility measurements CsV3Sb5 with highest Tc 2.7 K family....
Highly active lattice oxygen released from ultrahigh nickel cathodes degrade chloride solid electrolytes, forming an inert interphase; this phenomenon worsens at higher voltages. Reducing the cut-off voltage markedly enhances ASSLBs’ operational lifespan.
Abstract Polymeric fibres with small radii (such as 125 nm) are delicate to handle and should be laid down on a solid substrate obtain practical devices. However, placing these nanofibres commonly used glass substrates prevents them from guiding light. In this study, we numerically experimentally demonstrate that when the nanofibre is placed suitable dielectric multilayer, it supports guided mode, Bloch surface wave (BSW) confined in one dimension. The physical origin of new mode discussed...
We propose a method of fabricating subwavelength structures based on multi-exposure surface plasmon interference lithography. This new nanolithography technique fabricates various breaking the diffraction limit, which differs from common writing micro by using two-laser-beam with sample rotation. Analysis optical field distributions obtained proposed technique, was performed theory lithography in combination coordinate matrix transformation, is also provided. Various special are demonstrated...
In this paper, we studied the hybrid surface plasmons excited by heterogeneous composite structure of Au nano-array and Ag film via enhanced Raman scattering (SERS). By using finite difference time domain method, plasmon resonances are adjusted to excitation wavelength scattering, optimized geometric parameters with dual-wavelength characteristic obtained. Utilizing above which fabricated electron beam lithography as SERS substrate, spectra at two wavelengths were gained. The experimental...
Abstract Silicon carbide (SiC) is a promising material for wide range of applications, including mechanical nano‐resonators, quantum photonics, and non‐linear photonics. However, its chemical inertness poses challenges etching in terms resolution smoothness. Herein, novel approach known as helium ion‐bombardment‐enhanced (HIBEE) presented to achieve high‐quality SiC etching. The HIBEE technique utilizes focused ion beam with typical energy 30 keV disrupt the crystal lattices SiC, thus...
Abstract Optical lithography, the enabling process for defining features, has been widely used in semiconductor industry and many other nanotechnology applications. Advances of require developments high-throughput optical lithography capabilities to overcome diffraction limit meet ever-decreasing device dimensions. We report our recent experimental advancements scale up unlimited a massive using near field nanolithography bowtie apertures. A record number near-field elements, an array 1,024...
Homojunctions comprised of transition-metal dichalcogenides (TMD) polymorphs are attractive building blocks for next-generation two-dimensional (2D) electronic circuitry. However, the synthesis such homojunctions, which usually involves elaborate manipulation at nanoscale, still remains a great challenge. Herein, we demonstrated solution-processing strategy to successfully harvest lateral semiconductor–metal homojunctions with high yield. Specially, through precisely controlled lithiation...
The composite structure of metal nanoparticle and film can be used as a surface-enhanced Raman scattering (SERS) substrate to significantly enhance the signal adsorbed molecules due strong coupling between local surface plasmons propagating plasmons. An SERS with gold nano-cubes separated by polymethylmethacrylate (PMMA) is proposed. optimum thickness PMMA 15 nm obtained numerical simulation through using finite element method. spacer 14 prepared experimentally. Using R6G probe He-Ne laser...
A refractive index (RI) sensor based on an asymmetric metal-cladding dielectric waveguide structure, in which analyte is used as the guiding layer, proposed this report. The angular scanning attenuated total reflection spectra of and optical field distributions under mode resonance conditions were simulated, confirmed that multiple modes can be for sensing, different exist RI ranges. curves both angles sensitivity a function demonstrated wide sensing range achieved by combining orders. could...
Abstract In this paper, we propose two kinds of composite structures based on the one- and two-dimensional (1D&2D) gold grating a film for plasmonic refractive index sensing. The resonance modes sensing characteristics are numerically simulated by finite-difference time-domain method. structure 1D semi-cylinder is analyzed first, optimized parameters period obtained. sensitivity figure merit (FOM) can reach 660RIU/nm 169RIU −1 , respectively. Then, replace with 2D semi-sphere particles...
Surface plasmons are collective oscillations of electrons that can enable confinement electromagnetic energy to subwavelength scales. Recent progress in plasmonics has largely relied on noble metals which not CMOS compatible. Hence there is a need search for new plasmonic materials. Here we show the topological insulator Bi2Te2Se plasmonic, and study distinct surface arising from its bulk state. We launch propagating plasmon via nanoscale slit detect it using near-field scanning optical...
Abstract Despite the continued scaling down of semiconductor manufacturing, traditional lithography‐based nanofabrication only produces thin film structures, not 3‐D shapes. remains a major challenge, especially for materials. Most techniques, such as two‐photon printing and stereolithography, mostly work polymer materials, solid‐state Here, method capable fabricating sophisticated nanostructures silicon based on subsurface swelling phenomenon using focused helium ion is reported. Silicon...
Precise generation of spin defects in solid-state systems is essential for nanostructure fluorescence enhancement. We investigated a method creating single silicon vacancy defect arrays carbide using helium-ion microscope. Maskless and targeted can be realized by precisely controlling the focused He+ ion beam with an implantation uncertainty 60 nm. The generated vacancies were identified measuring optically detected magnetic resonance spectrum room temperature photoluminescence spectrum....
Two-dimensional (2D) layered dielectrics have recently emerged as the attractive building blocks for next-generation resistive random-access memory (RRAM). The ability to tailor conductive filament (CF) via site-selective defect engineering is essential realizing controlled switching property. We demonstrated hexagonal boron nitride ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${h}$...
Color centers in silicon carbide (SiC) offer exciting possibilities for quantum information processing. However, the challenge of ionization during optical manipulation leads to charge variations, hampering efficacy spin-photon interfaces. Recent research predicted that modified divacancy color can stabilize their states, resisting photoionization. This study presents a method precisely creating single arrays 4H-SiC using focused helium ion beam. Photoluminescence tests reveal consistent...