Plasmon Excitations in Scanning Tunneling Microscopy: Simultaneous Imaging of Modes with Different Localizations Coupled at the Tip

Manuel J. Romero; Jao Van De Lagemaat; Garry Rumbles; Mowafak M. Al-Jassim

doi:10.1063/1.2737400

Plasmon Excitations in Scanning Tunneling Microscopy: Simultaneous Imaging of Modes with Different Localizations Coupled at the Tip

Manuel J. Romero, Jao Van De Lagemaat, Garry Rumbles, Mowafak M. Al-Jassim

National Renewable Energy Laboratory

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

4 Scopus Citations

Abstract

The authors investigate the localization of photons emitted at the tip during scanning tunneling microscopy measurements on atomically flat gold substrates. Emission patterns of the plasmon-mediated luminescence exhibit distinct features that are assigned to the localized modes of the surface plasmon (LSP) confined to the tunneling gap and propagating modes (PSP) coupled to the LSP by the optical cavity beneath the tip. Tunneling luminescence spectroscopy reveals that the plasmon localization at the tip increases when modes of higher energy are excited. Acquisition of local emission patterns allows us for the simultaneous imaging of LSP and PSP modes.

Original language	American English
Article number	Article No. 193109
Number of pages	3
Journal	Applied Physics Letters
Volume	90
Issue number	19
DOIs	https://doi.org/10.1063/1.2737400 https://doi.org/10.1063/1.2737400
State	Published - 2007

NREL Publication Number

NREL/JA-520-41554

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AU - Rumbles, Garry

AU - Al-Jassim, Mowafak M.

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AB - The authors investigate the localization of photons emitted at the tip during scanning tunneling microscopy measurements on atomically flat gold substrates. Emission patterns of the plasmon-mediated luminescence exhibit distinct features that are assigned to the localized modes of the surface plasmon (LSP) confined to the tunneling gap and propagating modes (PSP) coupled to the LSP by the optical cavity beneath the tip. Tunneling luminescence spectroscopy reveals that the plasmon localization at the tip increases when modes of higher energy are excited. Acquisition of local emission patterns allows us for the simultaneous imaging of LSP and PSP modes.

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M3 - Article

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M1 - Article No. 193109

ER -

Plasmon Excitations in Scanning Tunneling Microscopy: Simultaneous Imaging of Modes with Different Localizations Coupled at the Tip

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