A5081683360- Metamaterials and Metasurfaces Applications
- Advanced Antenna and Metasurface Technologies
- Antenna Design and Analysis
- Plasmonic and Surface Plasmon Research
- Optical Coatings and Gratings
- Optical Wireless Communication Technologies
- Electromagnetic Scattering and Analysis
- Advanced Materials and Mechanics
- Structural Analysis and Optimization
- Radio Wave Propagation Studies
- Photonic Crystals and Applications
- Orbital Angular Momentum in Optics
- Energy Harvesting in Wireless Networks
Changchun Institute of Optics, Fine Mechanics and Physics
2017-2025
Chinese Academy of Sciences
2017-2025
University of Chinese Academy of Sciences
2021-2025
An all-silicon long-wavelength infrared (LWIR) achromatic metalens based on deep silicon etching is designed in this paper. With a fixed aperture size, the value range of equivalent optical thickness non-dispersive meta-atoms constructing determines minimum f-number. The fabrication characteristic with high aspect ratio amplifies difference between different by increasing propagation distance mode, which ensures small f-number to obtain better imaging resolution. A 280-µm-diameter 1 and...
Longwave infrared (LWIR) optics are essential for several technologies, such as thermal imaging and wireless communication, but their development is hindered by bulk high fabrication costs. Metasurfaces have recently emerged powerful platforms LWIR integrated optics; however, conventional metasurfaces highly chromatic, which adversely affects performance in broadband applications. In this work, the chromatic dispersion properties of analyzed via ray tracing, a general method correcting...
In this paper, we proposed a double-layer all-dielectric grating. Under the premise of ensuring strength resonance peak, upper SiO2 grating layer suppresses tendency high-order dipole excitation and improves transmittance at non-resonant position (T > 99%). The distribution chromaticity coordinates on CIE 1931 diagram also proves that suppressing side peaks can effectively increase saturation structural colors, which is essential for high precision imaging system. cyclic displacement current...
The complicated electromagnetic couplings between nanostructures present substantial challenges in the design and simulation of metasurfaces, especially large-scale elements. are typically neglected a conventional simulation. We introduce computational framework that includes coupling effects meta-atoms. Decomposing incident field segmenting computing range for individual local simulations allows an effective accurate entire metasurface. Numerical examples 2 mm diameter cylindrical metalens...
Transparent absorbers, with a functional integration of broadband electromagnetic shielding, microwave camouflage, and optical transparency, have attracted increasing attention in the past decades. Metal mesh, an artificial, optically transparent, conducting material composed periodic metallic gratings, is optimal choice for shielding layer transparent absorbers because its excellent compatibility between high transparency low resistance. However, micrometer-level periodicity grating...
A bandpass filter integrated metalens based on electromagnetically induced transparency (EIT) for long-wavelength infrared (LWIR) imaging is designed in this paper. The bandwidth of the metalens, which a diffractive optical element, decreases significantly with increase aperture size to fixed f-number, leads decline performance. same material composition and preparation process EIT metasurface make it feasible that abilities focusing filtering are into device. With purpose validating...
Optical vortex (OV) beams are ideal carriers for high-capacity optical communication, and long-wave infrared (LWIR) is the wavelength band long-range communication. Here, we propose a method achromatic generation of focused (FOV) with arbitrary homogenous polarization states in LWIR using single all-germanium metasurface. The chromatic aberration sensitivity eliminated by superimposing polarization-insensitive geometric phase dispersion-engineered dynamic phase. validated two broadband FOV...
In this work, we propose a design method of the narrow passband filter with high Q-factor based on Fano resonance. A single-layer metallic frequency selective surface (FSS) simple structure is first designed according to idea, but result not satisfying since transmittance will significantly decrease increase due presence an inherent ohmic damping. Further, improve design, ceramic-based FSS similar mechanism proposed, and requirements ultrahigh Q-factors can be met owing permittivity low loss...
A novel broadband bi-mode active frequency selective surface (AFSS) is presented in this paper. The proposed structure composed of a periodic array convoluted square patches and Jerusalem Crosses. According to simulation results, the response AFSS definitely exhibits mode switch feature between band-pass band-stop modes when diodes stay ON OFF states. In order apply uniform bias each PIN diode, an ingenious biasing network based on extension Wheatstone bridge adopted prototype AFSS. test...
A subwavelength-scale Huygens particle utilizing both electric and magnetic responses is proposed here. As the of are independent each other, arbitrary complex transmission coefficients covering all magnitudes from 0 to 0.9 phases (360°) can be achieved by varying its structural parameters. By properly engineering distribution phases, a metasurface grating with excitation +1 order harmonic designed fabricated. The measurement results in agreement simulations, further demonstrating validity...