Results 41 to 50 of about 453,061 (295)
Subwavelength metal grating metamaterial for polarization selective optical antireflection coating [PDF]
Journal of the Optical Society of America B, vol. 32, no. 7 (2015), 2015 A metamaterial structure consisting of a one-dimensional metal/air-gap subwavelength grating is investigated for optical antireflection coating on germanium substrate in the infrared regime. For incident light polarized perpendicularly to the grating lines, the metamaterial exhibits effective dielectric property and Fabry-Perot like plasmon-coupled ...
arxiv +1 more source
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
doaj +1 more source
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
doaj +1 more source
Topologically protected edge modes in one-dimensional chains of subwavelength resonators [PDF]
J Math. Pure Appl., 144 (2020): 17-49, 2019 The goal of this paper is to advance the development of wave-guiding subwavelength crystals by developing designs whose properties are stable with respect to imperfections in their construction. In particular, we make use of a locally resonant subwavelength structure, composed of a chain of high-contrast resonators, to trap waves at deep subwavelength ...
arxiv +1 more source
Guiding and Confining Light in Low-Index Circularly Symmetric Waveguides
IEEE Photonics Journal, 2011 A circularly symmetric waveguide with a low-index ring inside the core has been proposed and studied comprehensively. By taking advantage of the azimuthal TM01 mode, the structure can confine light inside the low-index region with very high power ...
Wenfu Zhang +3 more
doaj +1 more source
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
core +2 more sources
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
doaj +1 more source
Subwavelength Energy Transport Along a Dielectric Nanoparticle Chain in a Metal Slot
IEEE Photonics Journal, 2013 Subwavelength energy transportation along a dielectric nanoparticle chain in a metal slot is investigated. It is demonstrated that subwavelength resonance modes with nanoscale confinement could be well achieved in the proposed waveguide, free from the ...
Bing Shen +5 more
doaj +1 more source
Dark-field hyperlens: Super-resolution imaging of weakly scattering objects [PDF]
, 2015 We propose and numerically demonstrate a technique for subwavelength imaging based on a metal-dielectric multilayer hyperlens designed in such a way that only the large-wavevector waves are transmitted while all propagating waves from the image area are ...
Lavrinenko, Andrei V. +2 more
core +3 more sources
Subwavelength structures for silicon photonics biosensing
Optics & Laser Technology, 2019 Abstract Silicon photonic biosensors hold the potential for highly accurate, yet low cost point-of-care devices. Maximizing the sensitivity of the sensing chips while reducing the complexity and cost of the read-out system is pivotal to realize this potential. Here we present an extensive analysis, both from a practical and a theoretical perspective,
Wangüemert-Pérez, J. Gonzalo +8 more
openaire +4 more sources