A5101976296- Photonic and Optical Devices
- Photonic Crystals and Applications
- Optical Coatings and Gratings
- Metamaterials and Metasurfaces Applications
- Crystallization and Solubility Studies
- Orbital Angular Momentum in Optics
- Fern and Epiphyte Biology
- Plasmonic and Surface Plasmon Research
- X-ray Diffraction in Crystallography
- Lanthanide and Transition Metal Complexes
- Dielectric properties of ceramics
- Photonic Crystal and Fiber Optics
- Nanoplatforms for cancer theranostics
- Luminescence and Fluorescent Materials
- Advanced Fiber Laser Technologies
- Semiconductor Lasers and Optical Devices
- Ferroelectric and Piezoelectric Materials
- Neural Networks and Reservoir Computing
- Nonlinear Photonic Systems
- Multiferroics and related materials
- Thermal Radiation and Cooling Technologies
Nanjing University
2021-2024
Collaborative Innovation Center of Advanced Microstructures
2021-2024
ShanghaiTech University
2021
Peking University
2007-2009
China University of Mining and Technology
2008
Wuhan University
2008
Photonic quantum information processing relies on operating the state of photons, which usually involves bulky optical components unfavorable for system miniaturization and integration. Here, we report transformation distribution polarization-entangled photon pairs with multichannel dielectric metasurfaces. The entangled interact metasurface building blocks, where geometrical-scaling-induced phase gradients are imposed, transformed into two-photon states desired polarization. Two...
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...
Multiprotocol quantum key distribution (mQKD) enables users to flexibly select protocols for secure communication, though achieving mQKD introduces considerable system complexity and resource demands. Here, we report the first realization of using a metasurface, which generates multiple hybrid states photonic spin angular momentum (SAM) orbital (OAM) distributes them different users. The incident polarization-entangled photon pair interacts with producing four SAM-OAM high fidelity through...
Manipulation of polarization states with metasurfaces is a compelling approach for on-chip photonics and portable information processing. Yet it remains challenging to generate different types single piece metasurface. This paper demonstrates metasurface resolve this issue, which made L-shaped resonators geometrical sizes. Each resonator diffracts right- or left-handed circularly polarized state an additional geometrical-scaling-induced phase. The type each diffracted beam determined by the...
We report a giant enhancement of the third harmonic generation (THG) at 343 nm by periodically notched silicon waveguide arrays supporting guided mode resonances (GMRs) 1030 nm. Maximum efficiency η = 7.71 × 10−5 is achieved with peak pump power density 5.31 GW/cm2. The factor THG from GMR metasurface reaches up to 1.3 107 compared flat film same thickness. This observation demonstrates promising approach design high-efficiency nonlinear optical metasurfaces.
We present the design and simulation of an ultra-compact high-efficiency polarization beam splitter (PBS) based on self-collimation effect photonic crystal band gap in two dimensional crystals. The splitting properties PBS have been numerically studied using finite difference time domain (FDTD) method. It was shown that a 90° separating angle efficiency greater than 85% for TE- TM- modes over wide frequency range 0.268—0.278(c/a) can be obtained. size is only 9 μm×9 μm at optical...
A single-mode photonic crystal waveguide with a linear tapered slot is presented, which can localize light spatially by changing the width. Its effective bandwidth 52nm, from 1500nm to 1552 nm. Along structure, width reduced, and corresponding band curve shifts. The group velocity of becomes zero at edge. Therefore, different frequency components guided are slowed down finally localized correspondingly widths inside waveguide. Furthermore, this structure confine wave in narrow waveguide, may...
We propose a novel ring resonator configuration in channelless photonic crystal. The proposed utilizes the self-collimation effect and bending splitting mechanisms of line defects to route propagation light, instead conventional indexed-guided waveguides or crystal band gap waveguides. finite-difference time-domain method (FDTD) is used investigate characteristics resonator. new design exhibits an ON-OFF contrast with extinction ratio more than 12 dB, has ultra-compact footprint 3.3 × μm2...
We propose a compact, high efficient full photonic crystal Mach-Zehnder (MZ) interferometer based on the self-collimation and band gap in two-dimensional crystals. Line defected crystals are used as beam splitter mirror. The interference theory is to discuss output mechanism, compared with finite-difference time-domain (FDTD) simulation results. designed MZ can surve micro-detectors of gas liquid, which may play an important role integrated optics.
In this paper, we design a symmetric Mach-Zehnder interferometer (MZI) gas sensor based on two-dimensional Photonic crystals (Phc), which is filled with the gases of different refractive index in holes silicon plate. Self-Collimation (SC) effect analyzed by equi-frequency contour (EFC) used to route propagation light straightly; bending and splitting lights are realized line-defect structures. Finite Difference Time Domain (FDTD) simulations show that outputs MZI vary test arm π phase shift...