Results 21 to 30 of about 4,194 (248)
Partial transmutation of singularities in optical instruments [PDF]
Journal of Optics, 2011 Some interesting optical instruments such as the Eaton lens and the Invisible Sphere require singularities of the refractive index for their implementation. We show how to transmute those singularities into harmless topological defects in anisotropic media without the need for anomalous material properties.
Perczel, Janos +2 more
openaire +3 more sources
Using superoscillations for superresolved imaging and subwavelength focusing
Nanophotonics, 2018 It is now well-appreciated that a bandlimited wave can possess oscillations much more rapidly than those predicted by the bandlimit itself, in a phenomenon known as superoscillation.
Gbur Greg
doaj +1 more source
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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Rotating vortex imaging implemented by a quantized spiral phase modulation [PDF]
Journal of the European Optical Society-Rapid Publications, 2013 We demonstrate both theoretically and experimentally that a spiral mask with a finite number of discrete phase levels allows a defocusing induced rotation of the point spread function in the vortex imaging.
Baránek M., Bouchal Z.
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Hybridization of singular plasmons via transformation optics [PDF]
Proceedings of the National Academy of Sciences, 2019 Significance Surface plasmons, which are optical resonances supported by metallic nanostructures, are extremely useful for manipulating light on the nanoscale. However, designing novel plasmonic devices becomes quite challenging when the desired spectral response pattern is highly complex.
Sanghyeon Yu, Habib Ammari
openaire +4 more sources
FEBS Letters, EarlyView.The process of internalization of the Shiga toxin A subunit via formation of a complex with the Shiga toxin B subunit, which specifically binds to the Gb3 receptor. The peptide is designed to act as a carrier of drugs into cancer cells. Here, we explored the potential of peptides derived from the catalytic A subunit of Shiga toxin (STxA) to be drug ...
Giulia Opassi +6 more
wiley +1 more source
Results in Physics, 2018 This paper devotes to conformable fractional space-time perturbed Gerdjikov-Ivanov (GI) equation which appears in nonlinear fiber optics and photonic crystal fibers (PCF). We consider the model with full nonlinearity in order to give a generalized flavor.
Elif Yaşar +2 more
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Generation of hexagonal close-packed ring-shaped structures using an optical vortex
Nanophotonics, 2021 An optical vortex possesses a ring-shaped spatial profile and orbital angular momentum (OAM) owing to its helical wavefront. This form of structured light has garnered significant attention in recent years, and it has enabled new investigations in ...
Kawaguchi Haruki +9 more
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Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment
Molecular Oncology, EarlyView.This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley +1 more source
Generation and Propagation of Partially Coherent Power-Exponent-Phase Vortex Beam
Frontiers in Physics, 2021 We report on a partially coherent power-exponent-phase vortex beam (PC-PEPV), whose spatial coherence is controllable and the initial phase exhibits a periodic power exponential change.
Hao Zhang +8 more
doaj +1 more source