A5035485774- Plasmonic and Surface Plasmon Research
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Nonlinear Optical Materials Studies
- Metamaterials and Metasurfaces Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Photonic Crystals and Applications
- Optical Coatings and Gratings
- Ferroelectric and Piezoelectric Materials
- Photorefractive and Nonlinear Optics
- Terahertz technology and applications
- Dielectric properties of ceramics
- Orbital Angular Momentum in Optics
- Silicon Nanostructures and Photoluminescence
- Nonlinear Optical Materials Research
- Diamond and Carbon-based Materials Research
- Laser-Ablation Synthesis of Nanoparticles
- Quantum Dots Synthesis And Properties
- Advanced Antenna and Metasurface Technologies
- Solid State Laser Technologies
- Advanced biosensing and bioanalysis techniques
- Microwave Engineering and Waveguides
- Laser-Matter Interactions and Applications
- Molecular Junctions and Nanostructures
- Multiferroics and related materials
Shandong Normal University
2015-2024
East China Normal University
2023-2024
Shandong Special Equipment Inspection Institute
2021
Chinese Academy of Sciences
2006-2019
Technical Institute of Physics and Chemistry
2012-2019
Tampere University
2012-2014
Institute of Physics
2006-2011
Czech Academy of Sciences, Institute of Physics
2011
National Laboratory for Superconductivity
2011
All-optical switching based on a subwavelength metallic grating structure containing nonlinear optical materials has been proposed and numerically investigated. Metal-dielectric composite material is used in the for its larger third-order susceptibility (~10−7esu) ultrafast response properties. The calculated dependence of signal light intensity pump shows bistable behavior, which results significant switch effect. It rests surface plasmon's enhanced intensity-dependent change effective...
We explore the variation of SERS performance towards two different Ag NP layers using multilayer GO as a spacer.
MXenes, a new family of two-dimensional materials, were prepared by selective chemical etching method and the saturation absorption characteristics measured using Z-scan method. At 1.06 μm, passively Q-switched Nd:YAG ceramic laser was operated MXene Ti3C2T x as saturable absorber successfully for first time. an absorbed pump power 4.14 W, pulse repetition rate 186 kHz minimum width 359 ns. The maximal peak single-pulse energy 2.04 W 0.66 μJ respectively. This study demonstrates that MXenes...
We observe strong second-harmonic generation from silicon nitride films prepared on fused silica substrates by plasma enhanced chemical vapor deposition. The components of the second-order nonlinear optical susceptibility tensor are calibrated against quartz crystal. dominant component has magnitude 2.5 pm/V, almost two orders larger than reported for Si3N4, and about three times traditional crystal potassium dihydrogen phosphate. results indicate that great potential devices, especially in...
We report the giant enhanced optical harmonic generation in all-dielectric silicon nitride (SiN) based resonant waveguide gratings (RWGs) of quasi-bound states continuum (BICs) ultra-high Q factor and localized field. The BICs are realized by tuning excitation guided modes modulated geometry parameters four-part grating layer. At a feasible structure quasi-BIC for nanofabrication, SHG THG 103 106, compared with those from RWGs traditional two-part layer, respectively, even up to 108 1010...
The electromagnetic fields distributed on the surface region of nanostructure is very important to improve performance sensor. Here, we proposed a highly sensitive sensor based toroidal dipole (TD) governed by bound state in continuum (BIC) all-dielectric metasurface consisting single non-coaxial core-shell cylinder array. excitation TD resonance still challenging. designed not only supports but also has high Q-factor. More importantly, its electric field distributes at outer cylinder-shell,...
We proposed a high sensitivity and resolution surface plasmon resonance sensor composed of graphene–WS<sub>2</sub> hybrid nanostructure Au–Ag bimetallic-layers film.
We investigate second harmonic generation (SHG) in all-dielectric resonance nanostructures of high- Q factors assisted by quasi-bound states the continuum (quasi-BICs). The typical resonators, e.g., guided-mode gratings and asymmetric metasurfaces, fabricated AlGaAs were numerically studied with consideration nonlinear refraction AlGaAs. peak line-shape linear transmission SHG spectra resonators can be dramatically changed under intense pump intensities. conversion efficiency working at...
Localized surface plasmon resonance (LSPR) optical fiber biosensing is an advanced and powerful label-free technique which gets great attention for its high sensitivity to refractive index change in surroundings. However, the pursuit of a higher still challenging should be further investigated. In this paper, based on monolayer graphene/gold nanoparticles (Grm/Au NPs) three-dimensional (3D) hybrid structure, we fabricated D-shaped plastic (D-POF) LSPR sensor using facile two-step method. The...
We demonstrate a thousand-fold enhancement of second-harmonic generation in an all-dielectric silicon nitride (SiN) resonant waveguide grating compared to flat SiN film. The strong output measured at 532 nm results from the combination enhanced local fields nanostructure and large second-order susceptibility SiN. conversion efficiency structure is found be order 10(-8), which significantly larger than that typically observed plasmonic metal nanostructures.
We report on strong UV third-harmonic generation from silicon nitride films and resonant waveguide gratings. determine the absolute value of third-order susceptibility at wavelength 1064 nm to be χ(³) (-3ω,ω,ω,ω) = (2.8 ± 0.6) × 10⁻²⁰m²/V², which is two orders magnitude larger than that fused silica. The further enhanced by a factor 2000 fabricating grating onto film. Our results extend operating range CMOS-compatible nonlinear materials spectral regime.
High- Q factor can enhance the interaction between light and matter, which is an important parameter to decrease threshold of nanolasers. Here, we theoretically propose eccentric nanoring structure with a high controllable realize low-threshold nanolaser by amplifying quasi-bound states in continuum (quasi-BIC). The designed nanostructure supports quasi-BIC because symmetry protection-breaking nanostructure. has very about 9.6×10 4 also be adjusted changing structural parameters. We use...
We numerically investigate linear and nonlinear optical responses in metasurfaces consisting of Au double-gap split ring resonators (DSRRs). Symmetry-protected dual bound states the continuum (BICs) such plasmonic are observed at near-infrared regime. Efficient second harmonic generation (SHG) is obtained quasi-BIC models due to symmetry broken. The optimized SHG critical couplings between radiation nonradiation processes linearly x - y -polarized light, respectively. High conversion...
Linear and nonlinear optical properties of periodic triangular Au nanoparticle arrays were investigated. We compared the nonlinearity with that ultra-thin gold film consisting randomly distributed spheroidal clusters. A pronounced enhancement third-order susceptibility χ((3)) in was observed, figure merit, χ((3))/α, is one order magnitude larger than film. Such an could be due to strong local field near nanoparticles.
Indium Tin Oxide nanowire arrays (ITO-NWAs), as epsilon-near-zero (ENZ) materials, exhibit a fast response time and low saturable absorption intensity, which make them promising photoelectric materials. In this study, ITO-NWAs were successfully fabricated using chemical vapor deposition (CVD) method, the properties of material characterized in near-infrared region. Further, passively Q-switched all-solid-state lasers realized at wavelengths 1.0, 1.3, 2.0 µm as-prepared absorber (SA). To best...
Abstract Electrically modulated surface enhanced Raman scattering (E-SERS) can be able to regulate the plasmon resonance peak of metal nanostructures, further improve detection sensitivity SERS substrate. However, E-SERS substrates require auxiliary equipment provide electrical potential, and most them are non-flexible structure, which limits application in portable, in-situ fast area. Here, we developed an electric field-modulated substrate based on piezoelectric effect by combining PVDF...
Optical regulation strategy with the aid of hybrid materials can significantly optimize performance terahertz devices. Gold nanobipyramids (AuNBPs) synthetical tunability to near-infrared band show strong local field enhancement, which improves optical coupling at interface and benefits modulation performance. We design AuNBPs-integrated modulators multiple structured surfaces demonstrate that introducing AuNBPs effectively enhance their depths. In particular, an ultrahigh enhancement 1...
Hyperbolic metamaterials (HMMs), supporting surface plasmon polaritons (SPPs), and highly confined bulk (BPPs) possess promising potential for application as surface-enhanced Raman scattering (SERS) substrates. In the present study, a composite SERS substrate based on multilayer HMM gold-nanoparticle (Au-NP) layer was fabricated. A strong electromagnetic field generated at nanogaps of Au NPs under coupling between localized resonance (LSPR) BPP. Additionally, simulation structure assessed...