Results 131 to 140 of about 2,371 (296)
Компьютерная оптикаWe study tight focusing of coaxial superposition of two cylindrical vector beams (CVB) of different orders. In the initial plane, the polarization singularity index of such superposition equals the half-sum of the orders of the two constituent CVBs. Such
V.V. Kotlyar +3 more
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Creating and Controlling Polarization Singularities in Plasmonic Fields
Photonics, 2015 Nanoscale light fields near nanoplasmonic objects can be highly structured and can contain highly-subwavelength features. Here, we present the results of our search for the simplest plasmonic system that contains, and can be used to control, the smallest
Anouk de Hoogh +3 more
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Polar classes of singular varieties [PDF]
Annales scientifiques de l'École normale supérieure, 1978 © Gauthier-Villars (Editions scientifiques et medicales Elsevier), 1978, tous droits reserves. L’acces aux archives de la revue « Annales scientifiques de l’E.N.S. » (http://www. elsevier.com/locate/ansens), implique l’accord avec les conditions generales d’utilisation (http://www.numdam.org/legal.php).
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Glissile Interphase Boundaries Enable Collective Phase Switching in Epitaxial Polar Oxides
Advanced Functional Materials, EarlyView.A triple point is identified in the phase diagram of low‐symmetry epitaxial BiFeO3 thin film along with an extended regime of phase competition associated with a flattened energy landscape. The electromechanical response is shown to be governed by correlated interphase‐boundary motion, including scale‐free avalanche dynamics characteristic of systems ...
Mohammad Moein Seyfouri +11 more
wiley +1 more source
Optical Third-Harmonic Generation in Graphene
Physical Review X, 2013 We report strong third-harmonic generation in monolayer graphene grown by chemical vapor deposition and transferred to an amorphous silica (glass) substrate; the photon energy is in three-photon resonance with the exciton-shifted van Hove singularity at ...
Sung-Young Hong +5 more
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Index-symmetry breaking of polarization vortices in 2D random vector waves
, 2019 When the positions of two generic singularities of equally signed topological index coincide, a higher-order singularity with twice the index is created.
de Angelis, L. (author) +7 more
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Infinitely near imposed singularities and singularities of polar curves
Mathematische Annalen, 1990 Let \(\xi\) be a complex plane algebroid curve, defined by the equation \(f=0\). This paper is mainly devoted to the study of the singularities of the polar curves of \(\xi\) (defined by \(a\partial f/\partial x+b\partial f/\partial y=0\), a and b being complex numbers). The main results are theorem 8.1 and 11.3. Theorem 8.1 gives the virtual behaviour
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Chiral Phase Change Nanomaterials
Advanced Functional Materials, EarlyView.This work demonstrates reversible, non‐volatile phase transitions in chiral Ge2${\rm Ge}_2$Sb2${\rm Sb}_2$Te5${\rm Te}_5$ (GST) nanohelices for high‐speed optical modulation of chirality and dynamic control of the state of polarization (SOP). The chiral nanostructures are fabricated using a highly directional, wafer‐scale physical vapor deposition ...
Joshua A. Burrow +11 more
wiley +1 more source
Corrigendum to “Phase Singularities to Polarization Singularities”
International Journal of Optics, 2021 null Ruchi +2 more
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Advanced Functional Materials, EarlyView.Magnetic‐field‐assisted CVD of heterometallic single‐source precursors modulates thin‐film surface electronic structure and interfacial charge transfer. Field‐grown (Cobalt ferrite‐1T)CF‐1T films exhibit stabilized electronic states, lower kinetic barriers, and markedly enhanced nitrate‐to‐ammonia electrocatalysis versus (Cobalt ferrite‐0T) CF‐0T ...
Touraj Karimpour +11 more
wiley +1 more source