Results 151 to 160 of about 366,215 (335)

3D Dielectric Chiral Metamaterials Achieving Nondispersive Near‐Zero Ellipticity

open access: yesLaser &Photonics Reviews, EarlyView.
Broadband and high‐transmission‐efficiency optical activity (OA) is a critical functionality for numerous applications but is challenging to achieve. By engineering circularly polarized (CP) eigenstates in three‐dimensional (3D) dielectric helices, a 3D‐printed ceramic metamaterial is demonstrated for broadband OA with nondispersive near‐zero ...
Kang Du   +8 more
wiley   +1 more source

Dynamic Multi‐Focus 3D Laser Nanoprinting Based on Two‐Step Absorption and Computational Holography

open access: yesLaser &Photonics Reviews, EarlyView.
Low single‐focus laser powers in two‐step‐absorption 3D laser nanoprinting make parallelization efforts a viable route to increase print speeds while still relying on compact continuous‐wave lasers. Herein, an established two‐step‐absorption photoresist system with computational holography based on a digital micromirror device is combined in order to ...
Pascal Rietz   +5 more
wiley   +1 more source

Dimension of the set of positive solutions to nonlinear equations and applications

open access: yesElectronic Journal of Differential Equations, 2016
We study the covering dimension of the set of (positive) solutions to various classes of nonlinear equations involving condensing and A-proper maps. It is based on the nontriviality of the fixed point index of a certain condensing map or on oddness ...
Petronije S. Milojevic
doaj  

Discrete Chiral Ballistic Polariton Laser

open access: yesLaser &Photonics Reviews, EarlyView.
Planar microcavities in the strong light–matter coupling regime exhibit exciton‐polariton modes with a strong chiral response toward circularly polarized light. This feature is exploited alongside inherent spin‐orbit coupling of cavity light to generate giant discrete optical vortices in polygonal arrays of exciton‐polariton condensates.
Zuzanna Werner   +5 more
wiley   +1 more source

Dirichlet problems for semilinear elliptic equations with a fast growth coefficient on unbounded domains

open access: yesElectronic Journal of Differential Equations, 2005
When an unbounded domain is inside a slab, existence of a positive solution is proved for the Dirichlet problem of a class of semilinear elliptic equations that are similar either to the singular Emden-Fowler equation or a sublinear elliptic equation ...
Zhiren Jin
doaj  

The Stab Resistance of Bombyx Mori Silk Cocoons

open access: yesMacromolecular Materials and Engineering, EarlyView.
This study compares the stab responses of Bombyx mori silk cocoons in the forms of both full uncut cocoons, and as cut sections. This work indicates that the testing of full cocoons is more appropriate than that of cut outs, as the cut outs are endure significantly more artificial damage prior to testing, altering the mechanical behavior of the ...
Ateeq Ur Rehman   +2 more
wiley   +1 more source

On the fast solutions of nonlinear elliptic equations

open access: yesNumerische Mathematik, 1979
In a recent paper we described a multi-grid algorithm for the numerical solution of Fredholm's integral equation of the second kind. This "multi-grid iteration of the second kind" has important applications to elliptic boundary value problems. Here we study the treatment of nonlinear boundary value problems. The required amount of computational work is
openaire   +2 more sources

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