Mapping magnetic near-field distributions of plasmonic nanoantennas

Denitza Denkova; Niels Verellen; Alejandro V. Silhanek; Ventsislav K. Valev; Pol Van Dorpe; Victor V. Moshchalkov

doi:10.1021/nn305589t

Mapping magnetic near-field distributions of plasmonic nanoantennas

Denitza Denkova^*, Niels Verellen, Alejandro V. Silhanek, Ventsislav K. Valev, Pol Van Dorpe, Victor V. Moshchalkov

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

77 Citations (Scopus)

Abstract

We present direct experimental mapping of the lateral magnetic near-field distribution in plasmonic nanoantennas using aperture scanning near-field optical microscopy (SNOM). By means of full-field simulations it is demonstrated how the coupling of the hollow-pyramid aperture probe to the nanoantenna induces an effective magnetic dipole which efficiently excites surface plasmon resonances only at lateral magnetic field maxima. This excitation in turn affects the detected light intensity enabling the visualization of the lateral magnetic near-field distribution of multiple odd and even order plasmon modes with subwavelength spatial resolution.

Original language	English
Pages (from-to)	3168-3176
Number of pages	9
Journal	ACS Nano
Volume	7
Issue number	4
DOIs	https://doi.org/10.1021/nn305589t
Publication status	Published - 23 Apr 2013
Externally published	Yes

Keywords

hollow-pyramid probe
near-field imaging
optical magnetic field
optical nanobar antenna
probe-sample coupling
surface plasmon resonance

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10.1021/nn305589t

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title = "Mapping magnetic near-field distributions of plasmonic nanoantennas",

abstract = "We present direct experimental mapping of the lateral magnetic near-field distribution in plasmonic nanoantennas using aperture scanning near-field optical microscopy (SNOM). By means of full-field simulations it is demonstrated how the coupling of the hollow-pyramid aperture probe to the nanoantenna induces an effective magnetic dipole which efficiently excites surface plasmon resonances only at lateral magnetic field maxima. This excitation in turn affects the detected light intensity enabling the visualization of the lateral magnetic near-field distribution of multiple odd and even order plasmon modes with subwavelength spatial resolution.",

keywords = "hollow-pyramid probe, near-field imaging, optical magnetic field, optical nanobar antenna, probe-sample coupling, surface plasmon resonance",

author = "Denitza Denkova and Niels Verellen and Silhanek, {Alejandro V.} and Valev, {Ventsislav K.} and Dorpe, {Pol Van} and Moshchalkov, {Victor V.}",

year = "2013",

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doi = "10.1021/nn305589t",

language = "English",

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pages = "3168--3176",

journal = "ACS Nano",

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T1 - Mapping magnetic near-field distributions of plasmonic nanoantennas

AU - Denkova, Denitza

AU - Verellen, Niels

AU - Silhanek, Alejandro V.

AU - Valev, Ventsislav K.

AU - Dorpe, Pol Van

AU - Moshchalkov, Victor V.

PY - 2013/4/23

Y1 - 2013/4/23

N2 - We present direct experimental mapping of the lateral magnetic near-field distribution in plasmonic nanoantennas using aperture scanning near-field optical microscopy (SNOM). By means of full-field simulations it is demonstrated how the coupling of the hollow-pyramid aperture probe to the nanoantenna induces an effective magnetic dipole which efficiently excites surface plasmon resonances only at lateral magnetic field maxima. This excitation in turn affects the detected light intensity enabling the visualization of the lateral magnetic near-field distribution of multiple odd and even order plasmon modes with subwavelength spatial resolution.

AB - We present direct experimental mapping of the lateral magnetic near-field distribution in plasmonic nanoantennas using aperture scanning near-field optical microscopy (SNOM). By means of full-field simulations it is demonstrated how the coupling of the hollow-pyramid aperture probe to the nanoantenna induces an effective magnetic dipole which efficiently excites surface plasmon resonances only at lateral magnetic field maxima. This excitation in turn affects the detected light intensity enabling the visualization of the lateral magnetic near-field distribution of multiple odd and even order plasmon modes with subwavelength spatial resolution.

KW - hollow-pyramid probe

KW - near-field imaging

KW - optical magnetic field

KW - optical nanobar antenna

KW - probe-sample coupling

KW - surface plasmon resonance

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DO - 10.1021/nn305589t

M3 - Article

C2 - 23464670

AN - SCOPUS:84876526015

SN - 1936-0851

VL - 7

SP - 3168

EP - 3176

JO - ACS Nano

JF - ACS Nano

IS - 4

ER -

Mapping magnetic near-field distributions of plasmonic nanoantennas

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Keywords

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