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Energy-momentum cathodoluminescence spectroscopy of dielectric nanostructures

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Title: Energy-momentum cathodoluminescence spectroscopy of dielectric nanostructures
Authors: Mignuzzi, S
Mota, M
Coenen, T
Li, Y
Mihai, A
Petrov, PK
Oulton, RF
Maier, SA
Sapienza, R
Item Type: Journal Article
Abstract: Precise knowledge of the local density of optical states (LDOS) is fundamental to understanding nanophotonic systems and devices. Complete LDOS mapping requires resolution in energy, momentum, and space, and hence a versatile measurement approach capable of providing simultaneous access to the LDOS components is highly desirable. Here, we explore a modality of cathodoluminescence spectroscopy able to resolve, in single acquisitions, the dispersion in energy and momentum of the radiative LDOS. We perform measurements on a titanium nitride diffraction grating, bulk molybdenum disulfide, and silicon to demonstrate that the technique can probe and disentangle the dispersion of coherent and incoherent cathodoluminescence signals. The approach presented raises cathodoluminescence spectroscopy to a versatile tool for subwavelength design and optimization of nanophotonic devices in the reciprocal space.
Issue Date: 23-Jan-2018
Date of Acceptance: 23-Jan-2018
URI: http://hdl.handle.net/10044/1/56761
DOI: https://dx.doi.org/10.1021/acsphotonics.7b01404
ISSN: 2330-4022
Publisher: American Chemical Society
Start Page: 1381
End Page: 1387
Journal / Book Title: ACS Photonics
Volume: 5
Issue: 4
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)
Engineering & Physical Science Research Council (E
Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: EP/K503381/1
EP/M013812/1
EP/P02520X/1
EP/P033369/1
EP/P033431/1
EP/M017961/2
Keywords: Science & Technology
Technology
Physical Sciences
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Optics
Physics, Applied
Physics, Condensed Matter
Science & Technology - Other Topics
Materials Science
Physics
cathodoluminescence spectroscopy
local density of optical states
energy-momentum spectroscopy
dielectrics
Fourier imaging
LIGHT-EMISSION
THIN-FILMS
ANTENNAS
MODES
Publication Status: Published
Appears in Collections:Faculty of Engineering
Materials
Physics
Experimental Solid State
Faculty of Natural Sciences



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