A5027020742- Plasmonic and Surface Plasmon Research
- Terahertz technology and applications
- Photonic Crystals and Applications
- Photonic and Optical Devices
- Gold and Silver Nanoparticles Synthesis and Applications
- Metamaterials and Metasurfaces Applications
- Supercapacitor Materials and Fabrication
- Advanced Antenna and Metasurface Technologies
- Near-Field Optical Microscopy
- MXene and MAX Phase Materials
- Advanced biosensing and bioanalysis techniques
- Optical Coatings and Gratings
- Advanced Fluorescence Microscopy Techniques
- Advanced battery technologies research
- Antenna Design and Analysis
- Electromagnetic Scattering and Analysis
- Advanced Biosensing Techniques and Applications
- Ultrasound Imaging and Elastography
- Acoustic Wave Resonator Technologies
- Orbital Angular Momentum in Optics
- Photoacoustic and Ultrasonic Imaging
- Advancements in Battery Materials
- Superconducting and THz Device Technology
- Advanced Fiber Optic Sensors
- Image Processing Techniques and Applications
Chinese Academy of Sciences
2013-2024
Institute of Microelectronics
2013-2024
Guilin University of Technology
2024
Zhejiang University
2019-2023
State Key Laboratory of Clean Energy Utilization
2022
University of Chinese Academy of Sciences
2021
Institute of Microelectronics
2021
Zhejiang University of Science and Technology
2021
University of Maryland, Baltimore County
2014
Zhejiang Normal University
2011-2013
We experimentally demonstrate a chiral metamaterial exhibiting negative refractive index at terahertz frequencies. The presence of strong chirality in the lifts degeneracy for two circularly polarized waves and allows achievement without requiring simultaneously permittivity permeability. realization metamaterials offers opportunities investigation their novel electromagnetic properties, such as refraction reflection, well important device applications.
Mass production of ordered and porous three-dimensional (3D) electrodes is a crucial prerequisite for practical energy storage devices. MXenes have drawn considerable attention as pseudocapacitive materials outstanding electric conductivity surface redox reactions; however, they face challenges achieving 3D architectures especially at high mass loadings. Herein we propose reduced-repulsion freeze-casting assembly concept via interlayer interaction engineering constructing Ti3C2Tx films,...
We present a systematic study of close-ring pair based freestanding metamaterial fabricated by double-layer, self-aligned photolithography. Terahertz time-domain spectroscopy transmission measurements and numerical simulations have revealed negative index refraction in the frequency range 0.66-0.90 THz under normal wave incidence. The observed resonance behaviors can be well explained theoretical circuit model. electromagnetic properties figure merit such metamaterials are also explored...
We present a systematic numerical study of metal-dielectric-metal sandwich plasmonic structure for broadband resonant transmission at terahertz frequencies. The proposed consists periodic slotted metallic arrays on both sides thin dielectric substrate and is demonstrated to exhibit broad passband response. Various design considerations have been investigated exploit their influence the width center resonance frequency. ensures over wide range incident angles.
Transmission spectra of terahertz pulses through periodic array subwavelength holes exhibit a characteristic evolution with various hole widths. The peak absolute transmittance approaches maximum value at critical width, while linewidth broadening and blueshift frequency are observed increasing width. Such is attributed to the coupling between discrete resonant excitation surface plasmons continuum nonresonant transmission holes; this agrees well numerical analysis based on Fano model...
We demonstrate optical control of surface plasmon enhanced resonant terahertz transmission in two-dimensional subwavelength metallic hole arrays fabricated on gallium arsenide based substrates. Optically pumping the creates a conductive layer substrate, reducing amplitude both mode and direct transmission. Under low fluence, is more greatly affected by resonance damping than propagation loss substrate. An ErAs:GaAs nanoisland superlattice substrate shown to allow ultrafast with switching...
Using terahertz time domain spectroscopy we investigate the normal incidence transmission through periodically and randomly arranged planar split ring resonators (SRRs). Introduction of positional disorder in metamaterials has no effect on quality factor fundamental Inductive-Capacitive (LC) resonance. The dipole resonances undergo broadening shift their resonance frequencies. experiment reveals that distributed SRR structures interact incoherently at LC but couple coherently higher frequency
In the low-terahertz regime, resonance frequency of an array subwavelength holes in a semiconductor sheet can be doubled or more by isothermally increasing magnitude dc magnetic field, temperature presence constant and both field magnitude.
Terahertz properties of chemically synthesized MgO nanocrystals are studied by terahertz time-domain spectroscopy in the frequency range extending up to 3.7 THz. The experimentally determined optical and dielectric nanocrystalline compared with those a bulk single crystal. Three prominent resonance modes, which essentially responsible for nanostructured regime, characterized at ω1/(2π) = 4.26 THz, ω2/(2π) 7.68 ω3/(2π) 12.18 THz well-described multiple-oscillator model through theoretical...
Ti3C2Tx-based aerogels have attracted widespread attention for three-dimensional porous structures, which are promising to realize high-rate energy storage. However, disordered Ti3C2Tx with highly tortuous porosity fabricated by conventional unidirectional freeze-casting substantially increase ion diffusion lengths and hinder electrolyte ions transport. Herein we demonstrate a new bidirectional ice-templated approach synthesize ordered aerogel straight aligned channels, short pathways,...
Plasmonic imaging has exhibited superiority in label-free and fast detection to single nanoparticles due its high sensitivity temporal resolution, which plays an important role environmental monitoring biomedical research. As containing plenty of information associated with particle features, plasmonic been used for identifying the sizes, shapes, permittivity. Yet, effects nanoparticle features on are not investigated, hinders in-depth understanding applications identification. In this work,...
We present reflection properties of terahertz pulses in periodic arrays metallic rectangles subwavelength dimensions. Resonant is characterized by time-domain spectroscopy and attributed to the contributions from dipole localized surface plasmons isolated rectangles, their interactions between nonresonant direct reflection. A number factors, including polarization electric field, shape metal structures, dielectric function substrate, lattice constant are found influence properties. The...
The influence of a dielectric thin film on resonant transmission terahertz pulses in plasmonic array subwavelength holes asymmetric dielectric-metal interfaces is presented. A giant tuning up to 0.80 THz at the surface plasmon metal-air [±1,0] mode 1.95 and further enhanced metal-Si 0.5 are achieved by modifying thickness. experimental results characterized numerical simulation based finite element method angle-dependent measurements. sensitive nature hole promising applications biochemical...
A review of localized plasmonic properties 2-D terahertz (THz) metallic geometries is presented. The high electric conductivity metals in the THz regime enables fascinating behaviors observed structures subwavelength dimensions. Strong field enhancement was demonstrated arrays various particles including patches, rings, and ring-patch coaxials. We also show that periodic integrated coaxials comprised patches holes not only resulted a factor-of-eight increase normalized transmittance compared...
Abstract Both the localized resonance and excitation of spoof surface plasmon polaritons are observed in terahertz transmission spectra periodic subwavelength hole arrays. Analyzing with coupled oscillator model, we find that is actually facilitated by three successive processes: incident field first initiates oscillation around each then excited finally two resonances couple contribute to transmission. Tailoring size, coupling strength between quantitatively extracted. The size dependent...