Silicon nanofin grating as a miniature chirality-distinguishing beam-splitter
TLDR
A planar dielectric chirality-distinguishing beam-splitter that deflects left- and right-circularly polarized beams into different directions and utilizes an achiral architecture to realize a chiralbeam-splitting functionality.Abstract:
The polarization of light plays a central role in its interaction with matter, in situations ranging from familiar (for example, reflection and transmission at an interface) to sophisticated (for example, nonlinear optics). Polarization control is therefore pivotal for many optical systems, and achieved using bulk devices such as wave-plates and beam-splitters. The move towards optical system miniaturization therefore motivates the development of micro- and nanostructures for polarization control. For such control to be complete, one must distinguish not only between linear polarizations, but also between left- and right-circular polarizations. Some previous works used surface plasmons to this end, but these are inherently lossy. Other works used complex-layered structures. Here we demonstrate a planar dielectric chirality-distinguishing beam-splitter. The beam-splitter consists of amorphous silicon nanofins on a glass substrate and deflects left- and right-circularly polarized beams into different directions. Contrary to intuitive expectations, we utilize an achiral architecture to realize a chiral beam-splitting functionality.read more
Citations
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Metalenses at visible wavelengths: Diffraction-limited focusing and subwavelength resolution imaging.
Mohammadreza Khorasaninejad,Wei Ting Chen,Robert C. Devlin,Jaewon Oh,Alexander Y. Zhu,Federico Capasso +5 more
TL;DR: The results firmly establish that metalenses can have widespread applications in laser-based microscopy, imaging, and spectroscopy, with image qualities comparable to a state-of-the-art commercial objective.
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Recent advances in planar optics: from plasmonic to dielectric metasurfaces
Patrice Genevet,Federico Capasso,Francesco Aieta,Mohammadreza Khorasaninejad,Robert C. Devlin +4 more
TL;DR: In this paper, a classification of metasurfaces based on their different phase mechanisms and profiles and a comparison between plasmonic and dielectric surfaces is presented. And the authors place particular emphasis on the recent developments on electric and magnetic field control of light with Dielectric nanostructures and highlight the physical mechanisms and designs required for efficient all-dielectric metamaterials.
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Metasurface Polarization Optics: Independent Phase Control of Arbitrary Orthogonal States of Polarization.
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Metalenses: Versatile multifunctional photonic components
TL;DR: The key advantages of using dielectric phase-shifting elements with low optical loss and strong light confinement in the visible and near-infrared regions as BBs of flat lenses (metalenses) are discussed.
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Nonlinear photonic metasurfaces
TL;DR: In this article, the design of nonlinear photonic metasurfaces is discussed, in particular the criteria for choosing the materials and symmetries of the meta-atoms.
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Correction: Corrigendum: MicroRNA122 is a key regulator of α-fetoprotein expression and influences the aggressiveness of hepatocellular carcinoma
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