Monitoring morphological changes in 2D monolayer semiconductors using atom-thick plasmonic nanocavities

Daniel O. Sigle; Jan Mertens; Lars O. Herrmann; Richard W. Bowman; Sandrine Ithurria; Benoit Dubertret; Yumeng Shi; Hui Ying Yang; Christos Tserkezis; Javier Aizpurua; Jeremy J. Baumberg

doi:10.1021/nn5064198

Monitoring morphological changes in 2D monolayer semiconductors using atom-thick plasmonic nanocavities

Daniel O. Sigle, Jan Mertens, Lars O. Herrmann, Richard W. Bowman, Sandrine Ithurria, Benoit Dubertret, Yumeng Shi, Hui Ying Yang, Christos Tserkezis, Javier Aizpurua, Jeremy J. Baumberg^*

^*Corresponding author for this work

Physical Sciences and Engineering

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

107 Scopus citations

Abstract

Nanometer-sized gaps between plasmonically coupled adjacent metal nanoparticles enclose extremely localized optical fields, which are strongly enhanced. This enables the dynamic investigation of nanoscopic amounts of material in the gap using optical interrogation. Here we use impinging light to directly tune the optical resonances inside the plasmonic nanocavity formed between single gold nanoparticles and a gold surface, filled with only yoctograms of semiconductor. The gold faces are separated by either monolayers of molybdenum disulfide (MoS₂) or two-unit-cell thick cadmium selenide (CdSe) nanoplatelets. This extreme confinement produces modes with 100-fold compressed wavelength, which are exquisitely sensitive to morphology. Infrared scattering spectroscopy reveals how such nanoparticle-on-mirror modes directly trace atomic-scale changes in real time. Instabilities observed in the facets are crucial for applications such as heat-assisted magnetic recording that demand long-lifetime nanoscale plasmonic structures, but the spectral sensitivity also allows directly tracking photochemical reactions in these 2-dimensional solids.

Original language	English (US)
Pages (from-to)	825-830
Number of pages	6
Journal	ACS Nano
Volume	9
Issue number	1
DOIs	https://doi.org/10.1021/nn5064198
State	Published - Jan 27 2015

Bibliographical note

Publisher Copyright:
© 2014 American Chemical Society.

Keywords

2D-materials
molybdenum disulfide
nano-optics
nanoparticles
tunable plasmons
waveguides

ASJC Scopus subject areas

General Materials Science
General Engineering
General Physics and Astronomy

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title = "Monitoring morphological changes in 2D monolayer semiconductors using atom-thick plasmonic nanocavities",

abstract = "Nanometer-sized gaps between plasmonically coupled adjacent metal nanoparticles enclose extremely localized optical fields, which are strongly enhanced. This enables the dynamic investigation of nanoscopic amounts of material in the gap using optical interrogation. Here we use impinging light to directly tune the optical resonances inside the plasmonic nanocavity formed between single gold nanoparticles and a gold surface, filled with only yoctograms of semiconductor. The gold faces are separated by either monolayers of molybdenum disulfide (MoS2) or two-unit-cell thick cadmium selenide (CdSe) nanoplatelets. This extreme confinement produces modes with 100-fold compressed wavelength, which are exquisitely sensitive to morphology. Infrared scattering spectroscopy reveals how such nanoparticle-on-mirror modes directly trace atomic-scale changes in real time. Instabilities observed in the facets are crucial for applications such as heat-assisted magnetic recording that demand long-lifetime nanoscale plasmonic structures, but the spectral sensitivity also allows directly tracking photochemical reactions in these 2-dimensional solids.",

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author = "Sigle, {Daniel O.} and Jan Mertens and Herrmann, {Lars O.} and Bowman, {Richard W.} and Sandrine Ithurria and Benoit Dubertret and Yumeng Shi and Yang, {Hui Ying} and Christos Tserkezis and Javier Aizpurua and Baumberg, {Jeremy J.}",

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doi = "10.1021/nn5064198",

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AU - Mertens, Jan

AU - Herrmann, Lars O.

AU - Bowman, Richard W.

AU - Ithurria, Sandrine

AU - Dubertret, Benoit

AU - Shi, Yumeng

AU - Yang, Hui Ying

AU - Tserkezis, Christos

AU - Aizpurua, Javier

AU - Baumberg, Jeremy J.

PY - 2015/1/27

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N2 - Nanometer-sized gaps between plasmonically coupled adjacent metal nanoparticles enclose extremely localized optical fields, which are strongly enhanced. This enables the dynamic investigation of nanoscopic amounts of material in the gap using optical interrogation. Here we use impinging light to directly tune the optical resonances inside the plasmonic nanocavity formed between single gold nanoparticles and a gold surface, filled with only yoctograms of semiconductor. The gold faces are separated by either monolayers of molybdenum disulfide (MoS2) or two-unit-cell thick cadmium selenide (CdSe) nanoplatelets. This extreme confinement produces modes with 100-fold compressed wavelength, which are exquisitely sensitive to morphology. Infrared scattering spectroscopy reveals how such nanoparticle-on-mirror modes directly trace atomic-scale changes in real time. Instabilities observed in the facets are crucial for applications such as heat-assisted magnetic recording that demand long-lifetime nanoscale plasmonic structures, but the spectral sensitivity also allows directly tracking photochemical reactions in these 2-dimensional solids.

AB - Nanometer-sized gaps between plasmonically coupled adjacent metal nanoparticles enclose extremely localized optical fields, which are strongly enhanced. This enables the dynamic investigation of nanoscopic amounts of material in the gap using optical interrogation. Here we use impinging light to directly tune the optical resonances inside the plasmonic nanocavity formed between single gold nanoparticles and a gold surface, filled with only yoctograms of semiconductor. The gold faces are separated by either monolayers of molybdenum disulfide (MoS2) or two-unit-cell thick cadmium selenide (CdSe) nanoplatelets. This extreme confinement produces modes with 100-fold compressed wavelength, which are exquisitely sensitive to morphology. Infrared scattering spectroscopy reveals how such nanoparticle-on-mirror modes directly trace atomic-scale changes in real time. Instabilities observed in the facets are crucial for applications such as heat-assisted magnetic recording that demand long-lifetime nanoscale plasmonic structures, but the spectral sensitivity also allows directly tracking photochemical reactions in these 2-dimensional solids.

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Monitoring morphological changes in 2D monolayer semiconductors using atom-thick plasmonic nanocavities

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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