A5040227540- Photonic and Optical Devices
- Plasmonic and Surface Plasmon Research
- Near-Field Optical Microscopy
- Orbital Angular Momentum in Optics
- Optical Coatings and Gratings
- Photonic Crystals and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Ionosphere and magnetosphere dynamics
- Terahertz technology and applications
- Advanced Fluorescence Microscopy Techniques
- Metamaterials and Metasurfaces Applications
- Advanced biosensing and bioanalysis techniques
- Recycling and Waste Management Techniques
- Neural Networks and Reservoir Computing
- Electromagnetic Simulation and Numerical Methods
- Advanced Electron Microscopy Techniques and Applications
- Digital Holography and Microscopy
- Advanced Fiber Laser Technologies
- Random lasers and scattering media
- Gyrotron and Vacuum Electronics Research
- Ion-surface interactions and analysis
- Integrated Circuits and Semiconductor Failure Analysis
- Semiconductor Lasers and Optical Devices
- Advanced Optical Sensing Technologies
- Advanced optical system design
Qingdao Women and Children's Hospital
2025
Qingdao University
2025
Wuhan No.1 Hospital
2024
Ocean University of China
2018-2024
Nanyang Technological University
2013-2022
University of Science and Technology of China
2022
Northeastern University
2012-2016
Yale University
2015
Universidad del Noreste
2014
Tongji University
2012-2014
Lenses are crucial to light-enabled technologies. Conventional lenses have been perfected achieve near-diffraction-limited resolution and minimal chromatic aberrations. However, such bulky cannot focus light into a hotspot smaller than half-wavelength of light. Pupil filters, initially suggested by Toraldo di Francia, can overcome the constraints conventional but not intrinsically chromatically corrected. Here we report single-element planar that only deliver sub-wavelength focusing, thus...
Superoscillatory displacement metrology The resolving power of light (or other waveforms, for that matter) is typically limited to about half the wavelength. However, multiple interference waves gives rise subwavelength “hotspots” in phase owing what termed superoscillation wave field. Yuan and Zheludev used a specially designed metasurface interfere laser (wavelength λ = 800 nm) created superoscillatory ruler comprising these hotspots. They demonstrated ability measure displacements around...
Light-driven plasmonic color filters are demonstrated by integrating gold annular aperture arrays with photoresponsive liquid crystals (LCs). Upon photoirradiation, a nematic−isotropic phase transition of the LCs arises from trans–cis photoisomerization photochromic LCs. As consequence, effective refractive index experienced impinging light changes, modulating transmission intensity. Plasmonics paves way for manipulating optical signals at nanoscale level coupling to coherent electronic...
Optical superoscillatory imaging, allowing unlabelled far-field super-resolution, has in recent years become reality. Instruments have been built and their super-resolution imaging capabilities demonstrated. The question is no longer whether this can be done, but how well: what resolution practically achievable? Numerous works optimised various particular features of spots, order to probe the limits we need simultaneously optimise all important spot features: those that define system. We...
Super-oscillation is a counterintuitive phenomenon describing localized fast variations of functions and fields that happen at frequencies higher than the highest Fourier component their spectra. The physical implications this effect have been studied in information theory optics classical fields, used super-resolution imaging. As general wave dynamics, super-oscillations also predicted to exist quantum wavefunctions. Here we report experimental demonstration super-oscillatory behavior...
A nonintrusive far-field optical microscopy resolving structures at the nanometer scale would revolutionize biomedicine and nanotechnology but is not yet available. Here, a new type of introduced, which reveals fine structure an object through its scattering pattern under illumination with light containing deeply subwavelength singularity features. The reconstructed by neural network trained on large number events. In numerical experiments imaging dimer, powers better than
Optical wavefront engineering has been rapidly developing in fundamentals from phase accumulation the optical path to electromagnetic resonances of confined nanomodes metasurfaces. However, amplitude modulation light limited approaches that usually originate ohmic loss and absorptive dissipation materials. Here, an atomically thin photon-sieve platform made MoS2 multilayers is demonstrated for high-quality nanodevices, assisted fundamentally by strong excitonic at band-nesting region MoS2....
Microscopes and various forms of interferometers have been used for decades in optical metrology objects that are typically larger than the wavelength light λ. Metrology sub-wavelength objects, however, was deemed impossible due to diffraction limit. We report measurement physical size with deeply accuracy by analyzing pattern coherent scattered deep learning enabled analysis. With a 633 nm laser, we show width slits an opaque screen can be measured ∼λ/130 single-shot or ∼λ/260 (i.e., 2.4...
We report a resonant enhancement of luminescence intensity from an ensemble CdSe/ZnS quantum dots embedded in nanoscale rectangular photonic waveguide operating the cutoff regime and therefore experimentally demonstrate recently predicted phenomenon increase emission rate emitters epsilon-near-zero environment.
Malignant obstructive jaundice (MOJ) is characterized by the presence of malignant tumors infiltrating or compressing bile duct, causing poor drainage, generalized yellowing, pain, itching, and malaise. MOJ burdensome for both society families affected patients should be taken seriously. To evaluate clinical effect stent placement during endoscopic retrograde cholangiopancreatography relieving efficacy percutaneous transhepatic biliary drainage in terms liver function improvement,...
We demonstrate polarization-dependent plasmon-induced transparency in coupled triangle-rod arrays. The observed phenomenon is the result of destructive interference between bright and dark resonators this system, which verified through numerical simulations using finite-difference time-domain (FDTD) method. By precisely controlling structural parameters can be effectively manipulated. This plasmonically nanostructure could potentially useful for designing developing artificial plasmonic...
Noble metal and metal–dielectric–metal ultrathin films were deposited on the surfaces of ultrafine polymeric nanogratings, which fabricated using nanoimprint lithography. Experimental results showed dramatic differences surface morphologies for single triple flat corrugated surfaces. The effect morphology optical properties was hence investigated analyzed under linearly polarized light. plasmon resonances nanograting also characterized based Kretschmann prism-coupling method. are important...
We report super-resolution high-numerical-aperture and long-working-distance superoscillatory quartz lenses for focusing imaging applications. At the wavelength of λ = 633 nm, have an effective numerical aperture 1.25, a working distance 200 μm, focus into hotspot 0.4λ. Confocal with resolution determined by size is experimentally demonstrated.
Abstract Metathesis between decene and ethene to propene over a WO 3 /SiO 2 catalyst was studied. The dependency of the conversion decene, selectivity propene, working lifetime on ethane‐to‐decene molar ratio temperature evaluated. Low found be favorable production C 6 –C 9 olefins, while high enhanced 10+ olefins. decreased with weight hourly space velocity. optimum reaction conditions for metathesis process were determined. An obvious induction period exist in reaction.
Underwater vehicles have been developed over the last six decades for potential uses in scientific, commercial, environmental, and military purposes, always utilized to perform difficult tasks cluttered environments such as deep-sea mining, underwater sampling oceanic investigations. Since nonlinear highly coupled dynamics, motion control can be when completing complex tasks. This paper describes implementation of a model predictive controller novel class thruster-driven vehicle. In this...
Parametric decay instability (PDI) generated in milliseconds is an important physical phenomenon ionospheric heating. Usually, numerical simulations are used to study PDI mechanisms. They can intuitively investigate the generation and development process of PDI, which necessary experimental studies. When simulating through explicit finite-difference time-domain (FDTD), spatial scale spans from kilometers centimeters, time needs meet Courant–Friedrichs–Lewy condition. Simulating...
We provide the first explicit experimental evidence of gigantic values wavevectors and energy backflow in field structure a super-oscillatory lens. These observations explain how such lens can focus light into spot beyond diffraction limit.
Electrochemical (EC) etching having large selectivity based on the conductivity of n-type GaN was investigated to demonstrate feasibility novel wide bandgap devices. The EC relies generation holes at GaN/electrolyte surface for oxidation and chemical dissolution. Depending layer applied bias, may cause no effect, nanoscale porosification, or complete GaN. has been different areas material device technologies, including separation, preparation flexible membrane devices, formation distributed...
Texas Instruments has developed a Phase Light Modulator (PLM) based on Digital Processing (DLP) System, which alters the distribution of light field. This paper explores fundamental diffraction properties PLM using blazed grating model, investigates its capability to steer beams and tests uniformity as field modulator. We selected typical test contrast ratio examined how changing through affects ratio. When there is single spot area exists in modulated field, decreasing proportion individual...