Results 21 to 30 of about 26,576 (254)
Tunable Flat-Top Filtering Response in Cascaded Resonant Waveguide Gratings
IEEE Photonics Journal, 2021 The applicability of resonant waveguide grating (RWG)-based structures as filters to control the spectral response in an optical communication system is investigated.
Jinhua Hu +5 more
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Apodized Focusing Fully Etched Subwavelength Grating Couplers
IEEE Photonics Journal, 2015 We experimentally demonstrate apodized focusing subwavelength grating couplers for both the fundamental transverse electric (TE00) mode and the fundamental transverse magnetic (TM00) mode.
Yun Wang +10 more
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Compact Broadband Directional Couplers Using Subwavelength Gratings
IEEE Photonics Journal, 2016 We experimentally demonstrate compact broadband directional couplers using subwavelength gratings for silicon-on-insulator wafers with silicon layers of 220 nm.
Yun Wang +6 more
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Inverse designed extended depth of focus meta-optics for broadband imaging in the visible
Nanophotonics, 2021 We report an inverse-designed, high numerical aperture (∼0.44), extended depth of focus (EDOF) meta-optic, which exhibits a lens-like point spread function (PSF).
Bayati Elyas +5 more
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A Slot-Based Surface Plasmon-Polariton Waveguide With Long-Range Propagation and Superconfinement
IEEE Photonics Journal, 2012 A full-vector spectral element method (SEM) is applied to model and simulate surface plasmon-polariton (SPP) waveguides. Gauss-Lobatto-Legendre (GLL) polynomials are used to construct higher-order basis functions to achieve spectral accuracy.
G. X. Cai +4 more
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Novel Quadruple-Band Microwave Metamaterial Absorber
IEEE Photonics Journal, 2015 In this paper, we report the design, analysis, and simulation of a novel quadrupleband metamaterial absorber at microwave frequencies. The absorber is composed of delicate periodic patterned structures and a metallic background plane, which are separated
Nan Wang +6 more
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Experimental observation of superscattering [PDF]
, 2018 Superscattering, induced by degenerate resonances, breaks the fundamental single-channel limit of scattering cross section of subwavelength structures; in principle, an arbitrarily large total cross section can be achieved via superscattering.
Chen, Hongsheng +8 more
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Microcavities with suspended subwavelength structured mirrors.
Optics express, 2018 We investigate the optical properties of microcavities with suspended subwavelength structured mirrors, such as high-contrast gratings or two-dimensional photonic crystals slabs, and focus in particular on the regime in which the microcavity free-spectral range is larger than the width of a Fano resonance of the highly reflecting structured mirror.
Næsby, Andreas, Dantan, Aurelien Romain
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Arbitrarily-Wide-Band Dielectric Mirrors and Their Applications to SiGe Solar Cells
IEEE Photonics Journal, 2015 The dielectric mirror is an important optical component for optoelectronic devices, passive photonic devices, and solar cells. Unfortunately, the reflection bandwidth of distributed Bragg reflectors (DBRs) and high-index contrast mirrors (HCGs) are ...
Yan Kai Zhong +4 more
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Compressive Imaging of Subwavelength Structures [PDF]
SIAM Journal on Imaging Sciences, 2009 The problem of imaging extended targets (sources or scatterers) is formulated in the framework of compressed sensing with emphasis on subwavelength resolution. The proposed formulation of the problems of inverse source/scattering is essentially exact and leads to the random partial Fourier measurement matrix.
openaire +2 more sources