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Proceedings Paper

Optical fiber plasmonic lens for near-field focusing fabricated through focused ion beam
Author(s): Karen Sloyan; Henrik Melkonyan; Paulo Moreira; Marcus S. Dahlem
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Paper Abstract

We report on numerical simulations and fabrication of an optical fiber plasmonic lens for near-field focusing applications. The plasmonic lens consists of an Archimedean spiral structure etched through a 100 nm-thick Au layer on the tip of a single-mode SM600 optical fiber operating at a wavelength of 632:8 nm. Three-dimensional finite-difference time-domain computations show that the relative electric field intensity of the focused spot increases 2:1 times when the number of turns increases from 2 to 12. Furthermore, a reduction of the intensity is observed when the initial inner radius is increased. The optimized plasmonic lens focuses light into a spot with a full-width at half-maximum of 182 nm, beyond the diffraction limit. The lens was fabricated by focused ion beam milling, with a 200nm slit width.

Paper Details

Date Published: 20 February 2017
PDF: 6 pages
Proc. SPIE 10115, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics X, 101150D (20 February 2017);
Show Author Affiliations
Karen Sloyan, Masdar Institute of Science & Technology (United Arab Emirates)
Henrik Melkonyan, Masdar Institute of Science & Technology (United Arab Emirates)
Paulo Moreira, Masdar Institute of Science & Technology (United Arab Emirates)
Marcus S. Dahlem, Masdar Institute of Science & Technology (United Arab Emirates)


Published in SPIE Proceedings Vol. 10115:
Advanced Fabrication Technologies for Micro/Nano Optics and Photonics X
Georg von Freymann; Winston V. Schoenfeld; Raymond C. Rumpf, Editor(s)

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