Extraordinary optical transmission and vortex excitation by periodic arrays of Fresnel zone plates
| Autor: | A. Roszkiewicz, Wojciech Nasalski |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Physics
Fresnel zone Computer Networks and Communications business.industry Paraxial approximation General Engineering Plane wave FOS: Physical sciences Physics::Optics Extraordinary optical transmission Atomic and Molecular Physics and Optics Vortex Transverse plane Cardinal point Optics Artificial Intelligence business Optical vortex Optics (physics.optics) Physics - Optics Information Systems |
| Zdroj: | Bulletin of the Polish Academy of Sciences: Technical Sciences. 61:855-861 |
| ISSN: | 0239-7528 |
| DOI: | 10.2478/bpasts-2013-0092 |
| Popis: | Extraordinary optical transmission and good focusing properties of a two-dimensional scattering structure is presented. The structure is made of Fresnel zone plates periodically arranged along two orthogonal directions. Each plate consists of two ring-shaped waveguides supporting modes that match the symmetry of a circularly polarized incident plane wave. High field concentration at the focal plane is obtained with short transverse and long longitudinal foci diameters. Optical vortex excitation in a paraxial region of the transmitted field is also observed and analysed in terms of cross-polarisation coupling. The structure presented may appear useful in visualization, trapping and precise manipulations of nanoparticles. 13 pages, 10 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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