Generation of Tunable Plasmonic Vortices by Varying Wavelength of Incident Light

Surfaces plasmon polaritons carrying orbital angular momentum (OAM), known as plasmonic vortex, hold potential applications for on-chip information multiplexing. However, a traditional plasmonic vortex lens was usually designed for monochromatic incident light and encountered challenges in generatin...

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Bibliographic Details
Published inPhotonics Vol. 9; no. 11; p. 809
Main Authors Bai, Yihua, Zhang, Qing, Yang, Yuanjie
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.11.2022
Subjects
Angular momentum
Design
Electric fields
Incident light
Light
Multiplexing
orbital angular momentum
plasmonic metasurface
plasmonic vortex
Plasmonics
Polaritons
surface plasmon polaritons
Vortex generators
Vortices
Wavelength
Wavelengths
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Summary:Surfaces plasmon polaritons carrying orbital angular momentum (OAM), known as plasmonic vortex, hold potential applications for on-chip information multiplexing. However, a traditional plasmonic vortex lens was usually designed for monochromatic incident light and encountered challenges in generating multiple vortices. Here, we demonstrated a wavelength-tunable plasmonic vortex generator that ameliorates these limits, relying on the simultaneous design of a geometric metasurface on an Archimedean spiral. Through this design strategy, both the topological charges and the location of vortices can be controlled with different wavelengths of incident beams. This design and concept can preserve incident wavelength information and can be further applied to integrated and high-dimensional on-chip devices.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics9110809