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Plasmon spectroscopy and imaging of individual gold nanodecahedra: a combined optical microscopy, cathodoluminescence, and electron energy-loss spectroscopy study

Plasmon spectroscopy and imaging of individual gold nanodecahedra: a combined optical microscopy, cathodoluminescence, and electron energy-loss spectroscopy study
Plasmon spectroscopy and imaging of individual gold nanodecahedra: a combined optical microscopy, cathodoluminescence, and electron energy-loss spectroscopy study
Imaging localized plasmon modes in noble metal nanoparticles is of fundamental importance for applications such as ultrasensitive molecular detection. Here, we demonstrate the combined use of optical dark-field microscopy (DFM), cathodoluminescence (CL), and electron energy-loss spectroscopy (EELS) to study localized surface plasmons on individual gold nanodecahedra. By exciting surface plasmons with either external light or an electron beam, we experimentally resolve a prominent dipole-active plasmon band in the far-field radiation acquired via DFM and CL, whereas EELS reveals an additional plasmon mode associated with a weak dipole moment. We present measured spectra and intensity maps of plasmon modes in individual nanodecahedra in excellent agreement with boundary-element method simulations, including the effect of the substrate. A simple tight-binding model is formulated to successfully explain the rich plasmon structure in these particles encompasing bright and dark modes, which we predict to be fully observable in less lossy silver decahedra. Our work provides useful insight into the complex nature of plasmon resonances in nanoparticles with pentagonal symmetry.
1530-6984
4172-4180
Myroshnychenko, Viktor
9ccf026d-a73b-4875-83f7-562106428540
Nelayah, Jaysen
3bbef210-59b9-43ca-9745-46b4af7c4c10
Adamo, Giorgio
73480dbd-5d3e-415a-b569-9606b3dbeecc
Geuquet, Nicolas
fed7f717-1f19-4458-92da-590911505a49
Rodríguez-Fernández, Jessica
ab43c59f-bc82-48b5-9cc8-d3d606ab8cec
Pastoriza-Santos, Isabel
d9bf5916-b603-4998-a420-849093e0938f
MacDonald, Kevin F.
76c84116-aad1-4973-b917-7ca63935dba5
Henrard, Luc
b658bd0c-a89c-47cf-95d6-242163a13d14
Liz-Marzán, Luis M.
1c2b0cbb-6a7c-4140-a20b-e3be393ad557
Zheludev, Nikolay I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Kociak, Mathieu
720c12ec-00ef-4047-8f70-ce14cfc5f3e5
García de Abajo, F.Javier
07e3df24-ab3b-4a70-af18-188db066aa1a
Myroshnychenko, Viktor
9ccf026d-a73b-4875-83f7-562106428540
Nelayah, Jaysen
3bbef210-59b9-43ca-9745-46b4af7c4c10
Adamo, Giorgio
73480dbd-5d3e-415a-b569-9606b3dbeecc
Geuquet, Nicolas
fed7f717-1f19-4458-92da-590911505a49
Rodríguez-Fernández, Jessica
ab43c59f-bc82-48b5-9cc8-d3d606ab8cec
Pastoriza-Santos, Isabel
d9bf5916-b603-4998-a420-849093e0938f
MacDonald, Kevin F.
76c84116-aad1-4973-b917-7ca63935dba5
Henrard, Luc
b658bd0c-a89c-47cf-95d6-242163a13d14
Liz-Marzán, Luis M.
1c2b0cbb-6a7c-4140-a20b-e3be393ad557
Zheludev, Nikolay I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Kociak, Mathieu
720c12ec-00ef-4047-8f70-ce14cfc5f3e5
García de Abajo, F.Javier
07e3df24-ab3b-4a70-af18-188db066aa1a

Myroshnychenko, Viktor, Nelayah, Jaysen, Adamo, Giorgio, Geuquet, Nicolas, Rodríguez-Fernández, Jessica, Pastoriza-Santos, Isabel, MacDonald, Kevin F., Henrard, Luc, Liz-Marzán, Luis M., Zheludev, Nikolay I., Kociak, Mathieu and García de Abajo, F.Javier (2012) Plasmon spectroscopy and imaging of individual gold nanodecahedra: a combined optical microscopy, cathodoluminescence, and electron energy-loss spectroscopy study. Nano Letters, 12 (8), 4172-4180. (doi:10.1021/nl301742h).

Record type: Article

Abstract

Imaging localized plasmon modes in noble metal nanoparticles is of fundamental importance for applications such as ultrasensitive molecular detection. Here, we demonstrate the combined use of optical dark-field microscopy (DFM), cathodoluminescence (CL), and electron energy-loss spectroscopy (EELS) to study localized surface plasmons on individual gold nanodecahedra. By exciting surface plasmons with either external light or an electron beam, we experimentally resolve a prominent dipole-active plasmon band in the far-field radiation acquired via DFM and CL, whereas EELS reveals an additional plasmon mode associated with a weak dipole moment. We present measured spectra and intensity maps of plasmon modes in individual nanodecahedra in excellent agreement with boundary-element method simulations, including the effect of the substrate. A simple tight-binding model is formulated to successfully explain the rich plasmon structure in these particles encompasing bright and dark modes, which we predict to be fully observable in less lossy silver decahedra. Our work provides useful insight into the complex nature of plasmon resonances in nanoparticles with pentagonal symmetry.

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Published date: 29 June 2012
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 342415
URI: https://eprints.soton.ac.uk/id/eprint/342415
ISSN: 1530-6984
PURE UUID: 174e1832-5770-4e79-9352-0f97c8f02620
ORCID for Kevin F. MacDonald: ORCID iD orcid.org/0000-0002-3877-2976
ORCID for Nikolay I. Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

Catalogue record

Date deposited: 29 Aug 2012 11:25
Last modified: 26 Nov 2019 02:03

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Contributors

Author: Viktor Myroshnychenko
Author: Jaysen Nelayah
Author: Giorgio Adamo
Author: Nicolas Geuquet
Author: Jessica Rodríguez-Fernández
Author: Isabel Pastoriza-Santos
Author: Luc Henrard
Author: Luis M. Liz-Marzán
Author: Mathieu Kociak
Author: F.Javier García de Abajo

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