Nanoscale design of the local density of optical states

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Title: Nanoscale design of the local density of optical states
Authors: Mignuzzi, S
Vezzoli, S
Horsley, SAR
Barnes, WL
Maier, SA
Sapienza, R
Item Type: Journal Article
Abstract: We propose a design concept for tailoring the local density of optical states (LDOS) in dielectric nanostructures, based on the phase distribution of the scattered optical fields induced by point-like emitters. First we demonstrate that the LDOS can be expressed in terms of a coherent summation of constructive and destructive contributions. By using an iterative approach, dielectric nanostructures can be designed to effectively remove the destructive terms. In this way, dielectric Mie resonators, featuring low LDOS for electric dipoles, can be reshaped to enable enhancements of 3 orders of magnitude. To demonstrate the generality of the method, we also design nanocavities that enhance the radiated power of a circular dipole, a quadrupole, and an arbitrary collection of coherent dipoles. Our concept provides a powerful tool for high-performance dielectric resonators and affords fundamental insights into lightmatter coupling at the nanoscale.
Issue Date: 21-Feb-2019
Date of Acceptance: 20-Feb-2019
ISSN: 1530-6984
Publisher: American Chemical Society (ACS)
Start Page: 1613
End Page: 1617
Journal / Book Title: Nano Letters
Volume: 19
Issue: 3
Copyright Statement: © 2019 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, after peer review and technical editing by the publisher. To access the final edited and published work see
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: EP/P033431/1
Keywords: Science & Technology
Physical Sciences
Chemistry, Multidisciplinary
Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Science & Technology - Other Topics
Materials Science
Purcell enhancement
dielectric nanoantennas
local density of optical states
inverse design
Purcell enhancement
dielectric nanoantennas
inverse design
local density of optical states
Nanoscience & Nanotechnology
Publication Status: Published
Embargo Date: 2020-02-21
Online Publication Date: 2019-02-21
Appears in Collections:Physics
Experimental Solid State
Faculty of Natural Sciences

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