Chiral bilayer all-dielectric metasurfaces
WebNov 24, 2024 · Three-dimensional chiral plasmonic metasurfaces were demonstrated to offer enormous potential for ultrathin circular polarizers and applications in chiral … WebAug 27, 2024 · Abstract. We demonstrate that rotationally symmetric chiral metasurfaces can support sharp resonances with the maximum optical chirality determined by precise …
Chiral bilayer all-dielectric metasurfaces
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WebThe concept of optical bound states in the continuum (BICs) currently drives the field of dielectric resonant nanophotonics, providing an important physical mechanism for engineering high-quality (high-Q) optical resonances in high-index dielectric nanoparticles and structured dielectric metasurfaces. For structured metallic metasurfaces, … WebChiral photonic metasurfaces were extensively studied because of their ability to act as ultrathin circular polarizers and their potential in chiral sensing [1, 2]. Chiral …
WebApr 7, 2024 · However, these chiral metasurfaces are not rigorously planar (the structure is varied along the normal direction) and may cause inconvenience in their fabrication … WebUp to now, a large number of advances in resonant metasurface-based spectroscopic detection have been successively reported. Based on the physical properties of the material, research on the spectroscopic detection of metasurfaces has focused on three main categories: plasmonic metasurfaces, all-dielectric metasurfaces, and hybrid …
WebFeb 23, 2024 · This work challenges some long-held notions about chiral metamaterials and metasurfaces. "Previously, people thought that to achieve a strong, intrinsic chiro-optical response, the structures had ... WebAug 28, 2024 · We choose dielectric metasurfaces composed of silicon nanopillars with geometrically induced birefringence (Fig. 2a) to realize QWPs with accurate phase retardation control and high transmission ...
WebHere, a new type of self-aligned suspended chiral bilayer metasurface with only one-step electron beam lithography exposure is demonstrated. A significant optical chirality of 221° µm-1 can be realized using suspended metasurfaces with a thickness of 100 nm. Furthermore, this study experimentally demonstrates that such a structure is capable ...
WebJan 29, 2024 · To this end, several pioneering studies reported on the creation of chiral quasi-BIC resonances with giant circular dichroism (CD) in dielectric platforms. These include pairs of ellipse dimers with a small out-of-plane distance, [ 33 ] tilted etch twisted dimers, [ 34 ] asymmetric high aspect ratio silicon disk arrays, [ 35 ] and bilayer ... date christophe colombWebMar 23, 2024 · Thin perovskite films (~315 nm) were spin-cast on quartz substrates and used for fabricating the chiral metasurface. The dielectric functions of MAPbI 3 45 and quartz were used to design metasurfaces comprising of planar chiral metamolecules of mirror twist (Supplementary Fig. 1), with both unit cell size and period of 730 nm, … bitwise traductionWebApr 13, 2024 · Structural colors based on all-dielectric metasurfaces hold great promise for a wide range of applications, including high-density optical storage, ultra-high … date christmas in julyWebJul 20, 2015 · Abstract. We experimentally demonstrate a functional silicon metadevice at telecom wavelengths that can efficiently control the wavefront of optical beams by imprinting a spatially varying transmittance phase independent of the polarization of the incident beam. Near-unity transmittance efficiency and close to 0–2π phase coverage are enabled ... bitwise tickerWebNov 12, 2024 · Three-dimensional chiral plasmonic metasurfaces were demonstrated to offer enormous potential for ultrathin circular polarizers and applications in chiral sensing. … bitwise \u0026 booleanWebJun 8, 2024 · Dielectric chiral metasurfaces can generate harmonic waves with high efficiency and strong circular dichroism (CD), when they are supported by metallic substrates. Numerical results show that the second‐harmonic generation (SHG) efficiency of about 10−3% for a peak pump intensity of about 5 GW cm−2 can be achieved in the … bitwise thailandWebMar 29, 2024 · Here we propose and numerically demonstrate a planar chiral all-dielectric metasurface that exhibits giant circular dichroism and transmission asymmetry over 0.8 … bit-wise training of neural network weights