20 February 2017 Optical fiber plasmonic lens for near-field focusing fabricated through focused ion beam
Author Affiliations +
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.
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Karen Sloyan, Karen Sloyan, Henrik Melkonyan, Henrik Melkonyan, Paulo Moreira, Paulo Moreira, Marcus S. Dahlem, Marcus S. Dahlem, } "Optical fiber plasmonic lens for near-field focusing fabricated through focused ion beam", Proc. SPIE 10115, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics X, 101150D (20 February 2017); doi: 10.1117/12.2253594; https://doi.org/10.1117/12.2253594
PROCEEDINGS
6 PAGES


SHARE
Back to Top