A5101699561- Plasmonic and Surface Plasmon Research
- Metamaterials and Metasurfaces Applications
- Near-Field Optical Microscopy
- Advanced Fluorescence Microscopy Techniques
- Advanced Antenna and Metasurface Technologies
- Orbital Angular Momentum in Optics
- Photonic and Optical Devices
- Photonic Crystals and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Optical Coatings and Gratings
- Digital Holography and Microscopy
- Thermal Radiation and Cooling Technologies
- Antenna Design and Analysis
- Random lasers and scattering media
- Photoacoustic and Ultrasonic Imaging
- Optical Coherence Tomography Applications
- Advanced Fiber Laser Technologies
- Nonlinear Optical Materials Studies
- Nanowire Synthesis and Applications
- Neural dynamics and brain function
- Medical Imaging Techniques and Applications
- Neural Networks and Reservoir Computing
- Thermal properties of materials
- Advanced Radiotherapy Techniques
- Neuroscience and Music Perception
University of California, San Diego
2016-2025
Xi’an University
2023-2024
China Academy of Information and Communications Technology
2024
Huazhong Agricultural University
2023
Qingdao University of Technology
2023
Xi'an University of Technology
2023
Beijing University of Chinese Medicine
2023
Delft University of Technology
2023
Nankai University
2022
Peking University
2019-2021
The diffraction limit of light, which is causd by the loss evanescent waves in far field that carry high spatial frequency information, limits resolution optical lenses to order wavelength light. We report experimental demonstration hyperlens for sub-diffraction-limited imaging field. device magnifies subwavelength objects transforming scattered into propagating an anisotropic medium and projects high-resolution image at opens up possibilities applications such as real-time biomolecular...
Negative refraction in metamaterials has generated great excitement the scientific community. Although negative been realized microwave and infrared by using two-dimensional waveguide structures, creation of a bulk metamaterial showing at visible frequency not successful, mainly because significant resonance losses fabrication difficulties. We report made nanowires that show such for all incident angles region. Moreover, occurs far from any resonance, resulting low-loss broad-band...
We report the focusing of surface plasmon polaritons by circular and elliptical structures milled into optically thick metallic films or plasmonic lenses. Both theoretical experimental data for electromagnetic nearfield is presented. The mapped experimentally using scanning optical microscopy lithography. find that intensity at focal points lenses increases with size.
Far-field optical lens resolution is fundamentally limited by diffraction, which typically about half of the wavelength. This due to evanescent waves carrying small scale information from an object that fades away in far field. A recently proposed superlens theory offers a new approach surface excitation at negative index medium. We introduce far-field (FSL) capable imaging beyond diffraction limit. The FSL significantly enhances and converts them into propagating are measured show can image...
Optical edge detection is a useful method for characterizing boundaries, which also in the forefront of image processing object detection. As field metamaterials and metasurface growing fast an effort to miniaturize optical devices at unprecedented scales, experimental realization with remains challenge lags behind theoretical proposals. Here, we propose mechanism based on Pancharatnam-Berry-phase metasurface. We experimentally demonstrated broadband using designed dielectric metasurfaces...
Remotely switchable edge imaging is demonstrated on the basis of metasurface illuminated by polarization-entangled photons.
Abstract Label‐free super‐resolution (LFSR) imaging relies on light‐scattering processes in nanoscale objects without a need for fluorescent (FL) staining required super‐resolved FL microscopy. The objectives of this Roadmap are to present comprehensive vision the developments, state‐of‐the‐art field, and discuss resolution boundaries hurdles that be overcome break classical diffraction limit label‐free imaging. scope spans from advanced interference detection techniques, where...
properties of the optical surface plasmons in microwave and terahertz frequencies using subwavelength artificial structures to construct negative permittivity.The spoof also benefit from realization ultrathin corrugated metallic strips [14], as they are compatible with printed circuit boards (PCBs) integrated technologies.Since propagating localized were experimentally realized PCBs 2013 2014 [14, 15], this area flourishes prospective applications emerging circuits, sensing, wireless...
We report abnormally large positive and negative lateral optical beam shifts at a metal–air interface when the surface plasmon resonance of metal is excited. The optimal thickness for minimal resonant reflection identified as critical above which displacement observed. Experimental results show good agreement with theoretical predictions observed bidirectional displacements also indicate existence forward backward propagating waves metal.
We report here the design, fabrication and characterization of optical hyperlens that can image sub-diffraction-limited objects in far field. The is based on an artificial anisotropic metamaterial with carefully designed hyperbolic dispersion. successfully fabricated such a composed curved silver/alumina multilayers. Experimental results demonstrate far-field imaging resolution down to 125nm at 365nm working wavelength which below diffraction limit.
We report the fabrication of a three dimensional branched ZnO/Si heterojunction nanowire array by two-step, wafer-scale, low-cost, solution etching/growth method and its use as photoelectrode in photoelectrochemical cell for high efficiency solar powered water splitting. Specifically, we demonstrate that offers improved light absorption, increased photocurrent generation due to effective charge separation Si backbones ZnO branching, enhanced gas evolution kinetics because dramatically...
We propose a super resolution imaging technique called plasmonic structured illumination microscopy (PSIM), which combines the with tunable surface plasmon interference. Because of high-resolution enabled by using interference as an source, PSIM possesses higher image resolving power compared conventional microscopy. To demonstrate technique, we present two specific types structure designs for PSIM. The final images from simulations show 3-fold and 4-fold improvement epi-fluorescence
We report that two-dimensional (2D) sub-diffraction-limited images can be theoretically reconstructed by a new metamaterial far-field superlens. The superlens, composed of metal−dielectric multilayer and one-dimensional (1D) subwavelength grating, work over broad range visible wavelengths intrinsically. imaging principle the reconstruction process are described in detail. 2D ability enables more applications superlens optical nanoimaging sensing.
We experimentally demonstrate a wide field surface plasmon (SP) assisted super-resolution imaging technique, plasmonic structured illumination microscopy (PSIM), by combining tunable SP interference (SPI) with (SIM). By replacing the laser fringes in conventional SIM SPI patterns, PSIM exhibits greatly enhanced resolving power thanks to unique properties of waves. This technique is field, potential applications high-speed biomedical imaging.
Purpose: Compressed sensing theory has enabled an accurate, low-dose cone-beam computed tomography (CBCT) reconstruction using a minimal number of noisy projections. However, the time remains significant challenge for practical implementation in clinic. In this work, we propose novel gradient projection algorithm, based on Gradient-Projection-Barzilai-Borwein formulation (GP-BB), that handles total variation (TV)-norm regularization-based least squares problem CBCT highly efficient manner,...
Optical analog signal processing technology has been widely studied and applied in a variety of science engineering fields, with the advantages overcoming low-speed high-power consumption associated its digital counterparts. Much attention given to emerging metasurface field optical imaging systems. Here, we demonstrate, for first time, broadband two-dimensional spatial differentiation high-contrast edge based on dielectric across whole visible spectrum. This detection method works both...
With the size of plasmonic devices entering into nanoscale region, impact quantum physics needs to be considered. In past, effect on linear material properties has been studied extensively. However, nonlinear aspects have not explored much so far. On other hand, effort put field integrated optics and a medium with large nonlinearity is desirable. Here we study optical nanometre scale gold well by using z-scan method spectrum broadening technique. The results in giant Kerr susceptibility,...
Abstract Organic–inorganic hybrid perovskites have demonstrated tremendous potential for the next‐generation electronic and optoelectronic devices due to their remarkable carrier dynamics. Current studies are focusing on polycrystals, since controlled growth of device compatible single crystals is extremely challenging. Here, first chemical epitaxial crystal CH 3 NH PbBr with locations, morphologies, orientations, using combined strategies advanced microfabrication, homoepitaxy, low...