A5083755990- Plasmonic and Surface Plasmon Research
- Metamaterials and Metasurfaces Applications
- Photonic Crystals and Applications
- Photonic and Optical Devices
- Orbital Angular Momentum in Optics
- Ga2O3 and related materials
- Gold and Silver Nanoparticles Synthesis and Applications
- Optical Wireless Communication Technologies
- Photocathodes and Microchannel Plates
- GaN-based semiconductor devices and materials
- Magnetic Properties of Alloys
- ZnO doping and properties
- Laser Material Processing Techniques
- Magnetic properties of thin films
- Optical and Acousto-Optic Technologies
- Multiferroics and related materials
- Laser Design and Applications
- Advanced Fiber Optic Sensors
- Magnetic Properties and Applications
- Innovative Microfluidic and Catalytic Techniques Innovation
Nanjing University
2009-2023
National Laboratory of Solid State Microstructures
2009-2012
University of California, Berkeley
2011
Collaborative Innovation Center of Advanced Microstructures
2010
We experimentally demonstrate a plasmonic assisted Fabry–Perot cavity in metal/insulator/metal trilayer structure with L-shaped hole arrays inside, which significantly contribute to the mechanism realize nearly complete polarization conversion (=0.93) optical transmissions at near-infrared wavelength. This interesting property is found arising from an overlap of and modes two orthogonal states. discovered physics remarkably endows this metamaterial good performance looser fabrication...
We employ a general Lagrange model to describe the chiral optical properties of stereometamaterials. derive elliptical eigenstates twisted stacked split-ring resonator, taking phase retardation into account. Through this approach, we obtain powerful Jones matrix formalism which can be used calculate polarization rotation, ellipticity, and circular dichroism transmitted waves through stereometamaterials at any incident polarization. Our experimental measurements agree well with our model.
This paper investigates the radiation properties of two coupled split-ring resonators (SRRs). Due to electromagnetic coupling, hybrid magnetic plasmon modes were induced in structure. Our calculations show that loss structure was greatly suppressed by hybridization effect. led a remarkable increase $Q$ factor system compared single SRR. By adjusting distance between SRRs, changed correspondingly due different coupling strengths. resulted functioned as type nanocavity with an adjustable factor.
Magnetic resonance coupling between connected split ring resonators (SRRs) and magnetic plasmon (MP) excitations in the SRR chains were theoretically studied.By changing connection configuration, two different behaviors observed, therefore kinds of MP bands formed chains, accordingly.These MPs revealed with positive negative dispersion for homo-and anti-connected chain, respectively.Notably, these modes both have wide bandwidth due to conductive coupling.Moreover, chain is found supporting a...
We propose and analyze theoretically a double magnetic plasmon resonance nanolaser, in which ytterbium-erbium codoped material is used as the gain medium. Through design of modes, pumping light (980 nm) can be resonantly absorbed laser (1550 generated simultaneously. introduce set rate equations combined to describe operation predict lasing condition. According our calculations, disadvantage that difficult by thin slab materials overcome.
A resonance plasmon mode is formed between a gold nanorod and an infinite slab in infrared range, with local electric field enhancement factor over 40. strong optical attractive force exerted on the rod by at frequency. Based Maxwell stress tensor method numerical simulations, was calculated to be 2.0 nN/(mW/μm2). For fixed incident wavelength, enhanced obtained only for rods particular length when diameter fixed. This could used as possible selective trapping technique future.
Amplification of weak ultraviolet signals has always been a challenging issue to design and fabricate high-performance photodetectors. Here, we observe distinctive microplasma breakdown behavior in AlGaN-based avalanche photodiodes with artificial mesa architecture. At 107 V voltage, the photocurrent increases sharply whereas dark current intriguingly remains at extremely low level 0.1 nA as applied voltage increases. Simultaneously, significant blue luminescence phenomenon is observed edge...
We numerically investigated the magnetic plasmon resonances in double-rod and tri-rod structures (DRSs TRSs) for sensing applications. Like localized surface modes nanostructures, resonance wavelengths are sensitive to refractive index changes environment medium. The electromagnetic fields near DRSs TRSs were much more dielectric surrounding at wavelengths, which caused linewidth of responses narrower. A large figure merit could be obtained TRSs, enables use as elements with remarkable performance.
A vapor bubble is created by a weakly focused continuous-wave (CW) laser beam on the surface of silver film. The temporal dynamics experimentally investigated with tuned incident laser. expansion and contraction rates are determined power. diameter can be well controlled through tuning theory model given to explain underlying physics in process. method reported will have some interesting applications micro-fluidics bio-techniques.
A one-dimensional diatomic meta-chain with equal-size holes and different-length slits is designed. Broadband coherent magnetic plasmon waves (MPW) are formed in such a system, excited by both the electric resonance wide range of incidence angles (00-400) broad frequency bands (200-230 THz). The dispersion properties MPW measured our experiments agree theoretical calculation based on Lagrange model. MPWs reported this paper may have applications subwavelength integrated nanocircuits.
We successfully fabricated a high-performance <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\varepsilon $</tex-math> </inline-formula> -Ga notation="LaTeX">$_{\text{2}}$</tex-math> O notation="LaTeX">$_{\text{3}}$</tex-math> solar-blind photodetector employing an interdigital structure. The device exhibits prominent response peak at 240 nm with cutoff edge located 266 nm. Notably, the ultraviolet (UV)...
We studied the sensing properties of stereo-SRRs metamaterials composed from two twisted split-ring resonators (SRRs). Due to strong hybridization effect in system, polarization state transmitted wave is greatly changed at resonances. Since structure strongly coupled surrounding medium, change waves quite sensitive refractive index environment medium. The ratio <mml:math...
Simultaneously enhanced reflectance and transmittance greater than 35 dB are demonstrated for the lasing spaser (or spasing) behavior in an active fishnet metamaterial. In mimicking a cavity, equivalent slab with Lorentz dispersion index of refraction is established to model spasing metamaterial through Fabry-Perot effect. Numerical theoretical results show good agreement equal enhancement transmittance, as well non-monotonic dependence intensity on gain coefficient. addition, directed...
Loss is a crucial problem in plasmonic integrated optical circuits and metamaterials. The Er, Yb codoped gain material introduced into magnetic plasmon waveguide composed of chain nanosandwiches order to solve the loss such subwavelength waveguide. mode higher are chosen as signal pump light enhance radiation efficiencies. propagating investigated with different Er3+ doping concentration decay time. It shown that effect can not only compensate but also able amplify signal, when exceeding...