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Updated: May 19, 2026

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
Published on: June 7, 2019
Dispersive ground plane core-shell type optical monopole antennas fabricated with electron beam induced deposition
Hakkı Acar1, Toon Coenen, Albert Polman
1Center for Nanophotonics, FOM Institute, AMOLF Science Park 104, 1098 XG Amsterdam, The Netherlands. acar@amolf.nl
Abstract:
We present the bottom-up fabrication of dispersive silica core, gold cladding ground plane optical nanoantennas. The structures are made by a combination of electron-beam induced deposition of silica and sputtering of gold. The antenna lengths range from 300 to 2100 nm with size aspect ratios as large as 20. The angular emission patterns of the nanoantennas are measured with angle-resolved cathodoluminescence spectroscopy and compared with finite-element methods. Good overall correspondence between the the measured and calculated trends is observed. The dispersive nature of these plasmonic monopole antennas makes their radiation profile highly tunable.
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