Efficient coupling and field enhancement for the nano-scale: Plasmonic needle

Alexander Normatov; Pavel Ginzburg; Nikolai Berkovitch; Gilad M. Lerman; Avner Yanai; Uriel Levy; Meir Orenstein

doi:10.1364/OE.18.014079

Efficient coupling and field enhancement for the nano-scale: Plasmonic needle

Alexander Normatov^*, Pavel Ginzburg, Nikolai Berkovitch, Gilad M. Lerman, Avner Yanai, Uriel Levy, Meir Orenstein

^*Corresponding author for this work

Department of Applied Physics

Research output: Contribution to journal › Article › peer-review

38 Scopus citations

Abstract

Theoretical demonstration of efficient coupling and power concentration of radially-polarized light on a conical tip of plasmonic needle is presented. The metallic needle is grown at the center of radial plasmonic grating, engraved in a metal surface. The electromagnetic field distribution was evaluated by Finite Elements and Finite-Difference-Time-Domain methods. The results show that the field on the tip of the needle is significantly enhanced compared to the field impinging on the grating. The power enhancement exhibited a resonant behavior as a function of needle length and reached values of ∼10⁴. Test samples for few types of characterization schemes were fabricated.

Original language	English
Pages (from-to)	14079-14086
Number of pages	8
Journal	Optics Express
Volume	18
Issue number	13
DOIs	https://doi.org/10.1364/OE.18.014079
State	Published - 21 Jun 2010

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abstract = "Theoretical demonstration of efficient coupling and power concentration of radially-polarized light on a conical tip of plasmonic needle is presented. The metallic needle is grown at the center of radial plasmonic grating, engraved in a metal surface. The electromagnetic field distribution was evaluated by Finite Elements and Finite-Difference-Time-Domain methods. The results show that the field on the tip of the needle is significantly enhanced compared to the field impinging on the grating. The power enhancement exhibited a resonant behavior as a function of needle length and reached values of ∼104. Test samples for few types of characterization schemes were fabricated.",

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AU - Berkovitch, Nikolai

AU - Lerman, Gilad M.

AU - Yanai, Avner

AU - Levy, Uriel

AU - Orenstein, Meir

PY - 2010/6/21

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AB - Theoretical demonstration of efficient coupling and power concentration of radially-polarized light on a conical tip of plasmonic needle is presented. The metallic needle is grown at the center of radial plasmonic grating, engraved in a metal surface. The electromagnetic field distribution was evaluated by Finite Elements and Finite-Difference-Time-Domain methods. The results show that the field on the tip of the needle is significantly enhanced compared to the field impinging on the grating. The power enhancement exhibited a resonant behavior as a function of needle length and reached values of ∼104. Test samples for few types of characterization schemes were fabricated.

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Efficient coupling and field enhancement for the nano-scale: Plasmonic needle

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