Metal−dielectric parabolic antenna for directing single photons

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Title: Metal−dielectric parabolic antenna for directing single photons
Authors: Morozov, S
Gaio, M
Maier, S
Sapienza, R
Item Type: Journal Article
Abstract: Quantum emitters radiate light omni-directionally, making it hard to collect and use the generated photons. Here, we propose a three-dimensional metal–dielectric parabolic antenna surrounding an individual quantum dot as a source of collimated single photons, which can then be easily extracted and manipulated. Our fabrication method relies on a single optically induced polymerization step once the selected emitter has been localized by confocal microscopy. Compared to conventional nanoantennas, our geometry does not require near-field coupling, and it is, therefore, very robust against misalignment issues and minimally affected by absorption in the metal. The parabolic antenna provides one of the largest reported experimental directivities (D = 106) and the lowest beam divergences (Θ1/2 = 13.5°) and a broadband operation over all of the visible and near-infrared range together with extraction efficiency of more than 96%, offering a practical advantage for quantum technological applications.
Issue Date: 29-Mar-2018
Date of Acceptance: 29-Mar-2018
ISSN: 1530-6984
Publisher: American Chemical Society
Start Page: 3060
End Page: 3065
Journal / Book Title: Nano Letters
Volume: 18
Issue: 5
Copyright Statement: © 2018 American Chemical Society. ACS AuthorChoice - This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: EP/P033431/1
Keywords: Optical antenna
direct laser writing
directional emission
quantum dot
single photon emitter
MD Multidisciplinary
Nanoscience & Nanotechnology
Publication Status: Published
Appears in Collections:Physics
Experimental Solid State

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