Diffraction limited focusing and routing of gap plasmons by a metal-dielectric-metal lens
| Autor: | David A. Czaplewski, Brian S. Dennis, D.O. Lopez, Michael I. Haftel, Girsh Blumberg, Vladimir A. Aksyuk |
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| Rok vydání: | 2015 |
| Předmět: |
Diffraction
Materials science Condensed Matter - Mesoscale and Nanoscale Physics business.industry FOS: Physical sciences Physics::Optics Surface plasmon polariton Atomic and Molecular Physics and Optics law.invention Lens (optics) Optics law Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Focal length Photonics business Lithography Refractive index Plasmon Physics - Optics Optics (physics.optics) |
| Zdroj: | Optics express. 23(17) |
| ISSN: | 1094-4087 |
| Popis: | Passive optical elements can play key roles in photonic applications such as plasmonic integrated circuits. Here we experimentally demonstrate passive gap-plasmon focusing and routing in two-dimensions. This is accomplished using a high numerical-aperture metal-dielectric-metal lens incorporated into a planar-waveguide device. Fabrication via metal sputtering, oxide deposition, electron- and focused-ion- beam lithography, and argon ion-milling is reported on in detail. Diffraction-limited focusing is optically characterized by sampling out-coupled light with a microscope. The measured focal distance and full-width-half-maximum spot size agree well with the calculated lens performance. The surface plasmon polariton propagation length is measured by sampling light from multiple out-coupler slits. |
| Databáze: | OpenAIRE |
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