A5013256156- Metamaterials and Metasurfaces Applications
- Plasmonic and Surface Plasmon Research
- Orbital Angular Momentum in Optics
- Advanced Antenna and Metasurface Technologies
- Photonic and Optical Devices
- Photonic Crystals and Applications
- Solid State Laser Technologies
- Advanced Fiber Laser Technologies
- Near-Field Optical Microscopy
- Terahertz technology and applications
- Laser Design and Applications
- Nanofabrication and Lithography Techniques
- Photorefractive and Nonlinear Optics
- Optical Coatings and Gratings
- Antenna Design and Analysis
- Microfluidic and Bio-sensing Technologies
- Semiconductor Lasers and Optical Devices
- Optical measurement and interference techniques
- Mechanical and Optical Resonators
- X-ray Diffraction in Crystallography
- Advanced Optical Imaging Technologies
- Advanced X-ray Imaging Techniques
- Microfluidic and Capillary Electrophoresis Applications
- Electrowetting and Microfluidic Technologies
- Gold and Silver Nanoparticles Synthesis and Applications
Institute of Materials Research and Engineering
2012-2024
Agency for Science, Technology and Research
2014-2024
Shanghai Dianji University
2014-2024
Chengdu University of Technology
2023-2024
Capital Medical University
2023
Capital University
2023
Spectral Imaging Laboratory (United States)
2023
Xi'an Institute of Optics and Precision Mechanics
2023
Institute of Optics and Electronics, Chinese Academy of Sciences
2019-2022
Chinese Academy of Sciences
2008-2022
A multifocus optical vortex metalens, with enhanced signal-to-noise ratio, is presented, which focuses three longitudinal vortices distinct topological charges at different focal planes. The design largely extends the flexibility of tuning number and their positions for circularly polarized light in a compact device, provides convenience nanomanipulation vortices.
Abstract The dielectric metasurface hologram promises higher efficiencies due to lower absorption than its plasmonic counterpart. However, it has only been used, up now, for controlling linear‐polarization photons form single‐plane holographic images in the near‐infrared region. Here, we report a transmission‐type metahologram achieving three colors, free from high‐order diffraction and twin‐image issues, with 8‐level modulation of geometric phase by photon spin via precisely patterned Si...
Miniaturization of optical structures makes it possible to control light at the nanoscale, but on other hand imposes a challenge accurately handling numerous unit elements in miniaturized device with aperiodic and random arrangements. Here, we report both new analytical model experimental demonstration photon sieves ultrahigh-capacity subwavelength holes (over 34 thousands) arranged two different structural orders randomness aperiodicity. The sieve produces uniform hologram high diffraction...
This paper reports an effective method to enhance the surface plasmon resonance (SPR) on Ag films by using a thin Ni seed layer assisted deposition. with thickness of about 50 nm were deposited electron beam evaporation above ultrathin ∼2 both silicon and quartz substrates. The root-mean-square (rms) roughness correlation length have been reduced from >4 28 for pure film ∼1.3 19 Ag/Ni films, respectively. Both experimental simulation results show that exhibit enhanced SPR over narrower full...
Zinc oxide (ZnO) nanorods coated with silver (Ag) film on a polyethylene terephthalate (PET) flexible substrate were used as the photoanode for water splitting. The hybrid nanostructures prepared via low-temperature hydrothermal growth and electron beam evaporation. effects of plasmonic enhanced absorption, surface recombination inhibition improved charge transport are investigated by varying Ag thickness. Light trapping absorption enhancement further studied optimizing curvature PET...
Abstract Metasurfaces as artificially nanostructured interfaces hold significant potential for multi-functionality, which may play a pivotal role in the next-generation compact nano-devices. The majority of multi-tasked metasurfaces encode or encrypt multi-information either into carefully tailored pre-set complex incident beam arrays. Here, we propose and demonstrate multi-momentum transformation metasurface (i.e., meta-transformer), by fully synergizing intrinsic properties light, e.g.,...
Quantum entanglements between integer-order and fractional-order orbital angular momentums (OAMs) have been previously discussed. However, the entangled nature of arbitrary rational-order OAM has long considered a myth due to absence an effective strategy for generating beams. Therefore, we report single metadevice comprising bilaterally symmetric grating with aperture, creating optical beams dynamically controllable values that are continuously varying over rational range. Due its encoded...
The orbital angular momentum (OAM) of light can be taken as an independent and orthogonal degree freedom for multiplexing in optical communication system, potentially improving the system capacity to hundreds Tbits per second.
Abstract Metasurfaces enable the full control of electromagnetic waves over a wide spectrum. High‐efficiency transmissive metasurfaces have been demonstrated up to visible frequencies by using dielectrics. However, extending operating spectrum ultraviolet range is challenging. This due strong absorption in typical dielectric materials and inexhaustive understanding magnetic resonances nanostructures. Here, large‐bandgap material—niobium pentoxide (Nb 2 O 5 )—is introduced engineer geometric...
The Rashba effect, i.e., the splitting of electronic spin-polarized bands in momentum space a crystal with broken inversion symmetry, has enabled realization spin-orbitronic devices, which spins are manipulated by spin-orbit coupling. In optics, where helicity light polarization represents spin degree freedom for spin-momentum coupling, optical effect is manifested states opposite chirality space. Previous realizations relied on passive devices determining surface plasmon or propagation...
It remains a challenge to directly print arbitrary three-dimensional shapes that exhibit structural colors at the micrometer scale. Woodpile photonic crystals (WPCs) fabricated via two-photon lithography (TPL) are elementary building blocks produce 3D geometries generate due their ability either omnidirectional or anisotropic stop bands. However, existing approaches on WPCs when illuminating from top, requiring resolutions beyond limit of commercial TPL, which necessitates postprocessing...
Metasurfaces supporting optical bound states in the continuum (BICs) are emerging as simple and compact cavities to realize polarization-vortex lasers. The winding of polarization around singularity defines topological charges which generally set by cavity design cannot be altered without changing geometrical parameters. Here, a subwavelength-thin phase-change halide perovskite BIC metasurface functioning tunable vortex microlaser is demonstrated. Upon structural phase transitions, both its...
Coherent deep ultraviolet (DUV) light sources are crucial for various applications such as nanolithography, biomedical imaging, and spectroscopy. DUV can be generated by using conventional nonlinear optical crystals (NLOs). However, NLOs limited their bulky size, inadequate transparency at the regime, stringent phase-matching requirements harmonic generation. Recently, dielectric metasurfaces support high Q-factor resonances offer a promising approach efficient generation short wavelengths....
Tunable thin-film coating-based reflective color displays have versatile applications including image sensors, camouflage devices, spatial light modulators, and intelligent windows. However, generating high-purity colors using such coatings posed a challenge. Here, we reveal generation an ultralow-loss phase change material (Sb2S3)-based tunable aperiodic distributed Bragg reflector (A-DBR). By strategically adjusting the periodicity of adjacent layers A-DBRs, realize narrow photonic bandgap...
Phase retrieval is the key to quantitative x-ray phase-contrast imaging. To retrieve phase image of an wave field, in general one needs multiple images. We have made a new observation phase-attenuation duality for soft tissues, and we show how only single needed successful based on this duality. The phase-retrieval formula inhomogeneous tissue derived presented. striking enhancement contrast simulated images that approach produces.
In this letter, we propose and experimentally demonstrate a color filter based on an annular aperture geometry working in the visible range. The device is built by configuring array of apertures gold film suitable for transmission measurement. We show effective fine tuning resonance peaks through precise geometric control dimensions. Selective various sizes leads to continuous transmitted electromagnetic waves. This may find potential application high-definition displays, optical filters,...
Photolithography is the technology of choice for mass patterning in semiconductor and data storage industries. Superlenses have demonstrated capability subdiffraction-limit imaging been envisioned as a promising potential nanophotolithography. Unfortunately, patterns generated by current superlenses exhibited poor profile depth far below requirement photolithography. Here, we report an experimental demonstration sub-50 nm resolution nanophotolithography via smooth silver superlens with high...
Compact and miniaturized devices with flexible functionalities are always highly demanded in optical integrated systems. Plasmonic nanosieve has been successfully harnessed as an ultrathin flat platform for complex manipulation of light, including holography, vortex generation, nonlinear processes. Compared most the reported single‐functional devices, multifunctional nanosieves might find more novel applications across nanophotonics, optics, nanotechnology. Here, a promising roadmap...
Supercritical lens (SCL) can break the diffraction limit in far field and has been demonstrated for high-resolution scanning confocal imaging. Its capability sharper focusing needle-like long focal depth should allow lithography at violet or ultraviolet (UV) wavelength, however, this never experimentally demonstrated. As a proof of concept, paper SCLs operating 405 nm (h-line) wavelength with smaller full-width-at-half-maximum spot longer focus than conventional Fresnel zone while...