Detail publikace
Surface Plasmon Interference Device as a Source of Near-Field Power for Photoluminescence
KVAPIL, M. ŠIKOLA, T. KŘÁPEK, V.
Anglický název
Surface Plasmon Interference Device as a Source of Near-Field Power for Photoluminescence
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
en
Originální abstrakt
We theoretically demonstrate that a simple device consisting of an opaque gold layer with subwavelength slits – the so-called surface plasmon interference device – is capable of transforming the far-field optical power to the near-field one. Optimized slits yield a high conversion efficiency amounting to 45% in terms of the near-field to far-field electric intensity ratio. With a single linear slit arrangement, a propagating wave with a homogeneous field distribution is formed, attributed to surface plasmon polaritons based on its polarization properties. On the other hand, with the slit arrangement supporting interference, it is possible to obtain a standing wave with characteristic spatially modulated interference fringes and spatially separate polarization components. A circular slit can be used for focusing the near-field, with the possibility of obtaining a considerably enhanced field with respect to the excitation. We discuss the implication of the enhanced near-field for the near-field excitation of photoluminescence with the capability to bring a spatial resolution of the photoluminescence spectroscopy beyond the diffraction limit. © 2022 Polish Academy of Sciences. All rights reserved.
Anglický abstrakt
We theoretically demonstrate that a simple device consisting of an opaque gold layer with subwavelength slits – the so-called surface plasmon interference device – is capable of transforming the far-field optical power to the near-field one. Optimized slits yield a high conversion efficiency amounting to 45% in terms of the near-field to far-field electric intensity ratio. With a single linear slit arrangement, a propagating wave with a homogeneous field distribution is formed, attributed to surface plasmon polaritons based on its polarization properties. On the other hand, with the slit arrangement supporting interference, it is possible to obtain a standing wave with characteristic spatially modulated interference fringes and spatially separate polarization components. A circular slit can be used for focusing the near-field, with the possibility of obtaining a considerably enhanced field with respect to the excitation. We discuss the implication of the enhanced near-field for the near-field excitation of photoluminescence with the capability to bring a spatial resolution of the photoluminescence spectroscopy beyond the diffraction limit. © 2022 Polish Academy of Sciences. All rights reserved.
Klíčová slova anglicky
near field; photoluminescence; surface plasmon polariton
Vydáno
01.11.2022
ISSN
0587-4246
Ročník
142
Číslo
5
Strany od–do
668–672
Počet stran
5
BIBTEX
@article{BUT182406,
author="Michal {Kvapil} and Tomáš {Šikola} and Vlastimil {Křápek},
title="Surface Plasmon Interference Device as a Source of Near-Field Power for Photoluminescence",
year="2022",
volume="142",
number="5",
month="November",
pages="668--672",
issn="0587-4246"
}