A5082981883- Plasmonic and Surface Plasmon Research
- Terahertz technology and applications
- Photonic and Optical Devices
- Metamaterials and Metasurfaces Applications
- Photonic Crystals and Applications
- Superconducting and THz Device Technology
- Graphene research and applications
- Optical Coatings and Gratings
- Advanced Chemical Physics Studies
- Molecular Junctions and Nanostructures
- Advanced Antenna and Metasurface Technologies
- Quantum and electron transport phenomena
- 2D Materials and Applications
- GaN-based semiconductor devices and materials
- Atmospheric and Environmental Gas Dynamics
- Complex Systems and Time Series Analysis
- Advanced Semiconductor Detectors and Materials
- Fullerene Chemistry and Applications
- Thermal Radiation and Cooling Technologies
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced Memory and Neural Computing
- Semiconductor Quantum Structures and Devices
- Chemical Analysis and Environmental Impact
- Market Dynamics and Volatility
- Advanced Thermoelectric Materials and Devices
University of Shanghai for Science and Technology
2020-2024
University of Chinese Academy of Sciences
2016-2023
Tongji University
2020-2022
Shanghai Institute of Technical Physics
2013-2018
Chinese Academy of Sciences
2007-2017
University of Science and Technology of China
2014-2016
CAS Key Laboratory of Urban Pollutant Conversion
2014-2016
Quantum (Australia)
2014
Dalian Institute of Chemical Physics
2007
Structured plasmonic metamaterials offer a new way to design functionalized optical and electrical components, since they can be size-scaled for operation across the whole electromagnetic spectrum. Here, we theoretically investigated active split ring resonators based on graphene SiO2/Si substrate that shows tunable frequency amplitude modulation. For symmetrical structure, modulation depth of reach 58.58% 99.35%, 59.53% 97.7% respectively in two crossed-polarization orientations. Once...
Graphene‐like two‐dimensional materials (graphene, transition‐metal dichalcogenides (TMDCs)) have received extraordinary attention owing to their rich physics and potential applications in building nanoelectronic nanophotonic devices. Recent works concentrated on increasing the responsivity extending operation range longer wavelengths. However, weak absorption of gapless graphene, large bandgap (>1 eV) low mobility TMDCs limited spectral usage only a narrow visible spectrum. In this work,...
Abstract In terahertz (THz) photodetection, the efficient interaction between light and matter is crucial for enhancing material properties in nonequilibrium states. This work introduces an innovative approach using spiral plasmonic architectures to effectively control inversion‐symmetry coupling, promoting operational efficiency of light‐induced hot‐carrier effects THz band. The strategic design structures, focusing on chirality symmetry, enables successful manipulation a self‐driven...
Terahertz (THz) technology is becoming a spotlight of scientific interest due to its promising myriad applications including imaging, spectroscopy, industry control and communication. However, one the major bottlenecks for advancing this field lack well-developed solid-state sources detectors operating at THz gap which serves mark boundary between electronics photonics. Here, we demonstrate exceptionally wide tunable terahertz plasma-wave excitation can be realized in channel...
Abstract Synaptic device is an important component in artificial neural networks. Electrically‐controlled long‐term depression (LTD) demonstrated three‐terminal photonic synaptic devices, which useful for improving the efficiency of The mechanism similar to that photo‐induced doping effect. Photo‐assisted carrier transport and recombination are expected accelerate LTD process. However, effects photon illumination on not investigated. Here, electrical stimulation photo‐stimulation plasticity...
The ability to manipulate plasma waves in the two-dimensional-(2D)-electron-gas based plasmonic crystals is investigated this work. It demonstrated that plasmon resonance of 2D crystal can be tuned easily at terahertz frequency due wavevector quantization induced by size effect. After calculating self-consistently taking into account several potential mechanisms for resonant damping waves, it concluded plasmon-plasmon scattering plays dominant role. Based on calculations, we predict or...
An Otto-like configuration for the excitation of graphene surface plasmon polaritons (GSPPs) is proposed. The composed a metallic grating-dielectric-waveguide structure and monolayer with subwavelength vacuum gap between them. evanescent field located at bottom dielectric waveguide corresponding to grating-coupled guided-mode resonances (GMRs) utilized efficiently excite highly confined GSPPs. finite difference time domain method used investigate behaviors GMR-GSPP hybrid modes. dispersion...
Observations of the negative differential conductance (NDC) phenomenon in graphene field-effect transistors (FET) open up new opportunities for their application graphene-based fast switches, frequency multipliers and, most importantly, high oscillators to terahertz regime.
In this work, metal-graphene hybridized plasmon induced transparency (PIT) is systematically studied in the proposed simple metal/dielectric/graphene system. The PIT effect result of coupling between bright dipolar modes excited graphene regions under shorter metallic bars and dark quadrupolar longer bars. coupled Lorentz oscillator model used to help explain physical origin effect. Other than being tuned by distance lateral displacement orthogonal bars, efficiency can be further enhanced...
As global climate change intensifies, carbon emissions trading has become an important tool for countries to address change. China, as the world's largest emitter, been conducting pilots since 2011, and officially launched a national market in 2017. The construction of China's is crucial China efforts Market efficiency key indicator its success. This article aims measure analyze effectiveness market, explore policy measures enhance effectiveness. It selected data from effective days...
In this work, the plasmon drag effect in grating gated graphene with symmetric unit cell, ratchet and photo-thermoelectric asymmetric cell are studied. The correlation between total responsivity of source-drain bias is calculated numerically through hydrodynamic approach under small approximation. found to be much smaller than unidirectional travelling plasmons. by fixing lengths longer region ungated changing shorter region. results show that non-zero can obtained only assuming one kind...
The harmonic oscillator model is used in combination with the transfer matrix method to describe absorption of plasmonic devices a reflector. demonstrates that complete takes place as result destructive interference between reflection from device surface and In contrast, transmission results zero absorption. Using metal back reflector, resonance mode can be tuned by changing Fermi level graphene, which shifting two kinds interference. A stacked graphene-dielectric structure solve problem it...
We applied the harmonic oscillator model combined with transfer matrix method to study polarization conversion for transmitted waves in metallic grating/plasmon-excitation layer/metallic grating structure terahertz (THz) region. By comparing calculated spectra and simulated (by finite-difference-time-domain method) ones, we found that they correspond well each other. Both methods show Drude background absorption excited plasmon resonances are responsible conversion. The transmission is close...
Terahertz detectors based on two-dimensional Dirac materials offer a new approach for room-temperature terahertz detection with high response and low noise. However, these devices can hardly show over broad frequency range, mainly due to the poor absorption caused by their ultrathin nature. Here we apply metallic gratings enhance excitation efficiency of graphene plasmons. When nonzero source-drain bias is applied, plasmons generate orthogonal polarization incidence. The attributed...
This paper describes the dynamic interaction between plasmons in a two dimensional electron gas system under electrical tuning to high density regime AlN/GaN mobility transistor. The results demonstrate an enhanced resonance when are commonly excited, during which potentially splitting phenomenon of such is explored detail. An asymmetrical plasmon possess wide frequency tunability has also been demonstrated system, on contrary, indicate finite tunable symmetrical-plasmons as limited by...
Considering multi-dimensional concepts of liquidity, we introduces two classical liquidity measures to quantify the China carbon emission allowance(CCEA) trading markets, and analyze their activities. Then monthly unbalanced panel was constructed based on daily data further study influencing factors CCEA market. We find that: 1) No matter what method take, Hubei pilot is most liquid in context overall running periods, national market Guangdong are also well performed compared other markets....
In this work, we propose a structure consisting of three metamaterial layers and metallic grating layer to rotate the polarization arbitrary linearly polarized incidence y-direction with high transmissivity by electrically tuning these metamaterials. The transfer matrix method together harmonic oscillator model is adopted theoretically study proposed structure. Numerical simulation based on finite difference time-domain performed assuming that are constituted graphene ribbon arrays....
We show that the even order ungated modes can be excited under normal incidence while odd cannot in traditional single-side grating-gate graphene field-effect transistors. The will suppress excitation efficiency of gated modes. In to realize multiband detection by effectively exciting higher modes, frequency 1st mode should tuned up, which realized shortening length region. propose use dual-side structure shorten Gated up 21st complementary structure. ultra-multiband absorption actively...
Resonant behaviors and absorption enhancement of metallic grating-dielectric-metal (GDM) microcavity are theoretically investigated. The GDM structure is treated as periodic unit cells two serially-connected metal-dielectric-metal (MDM) air-dielectric-metal (ADM) waveguide resonators. resonant modes can be divided into three types: the LC mode, TEM supported by MDM resonator, TEM-TM hybrid whole structure. frequencies independent on a small incident oblique angle. However, for modes, each...
The localized electric field enhancement of graphene plasmon modes is limited by the duty cycle graphene, frequency, absorption and scattering rate. To obtain higher detectivity, required. While can be no larger than 100%, an intrinsic limitation, frequency designated, only parameter that designed freely to achieve high enhancement. By etching into periodic structures,
Hybrid optical-plasmonic modes have the characteristics of low loss and small mode volume, which will result in strong localization enhancement electromagnetic field. Such advantages hybrid are important for light-matter interactions. Here, terahertz (THz) Fabry-Perot resonances (FPRs) spoof surface plasmon polaritons (SSPPs) modified Otto scheme investigated both theoretical experimental aspects. The device structure is composed a metal grating silicon waveguide (MGSW) slit (MSG). two...