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Trapping of Micro Particles in Nanoplasmonic Optical Lattice

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Atomic-Scale Structural Fluctuations of a Plasmonic Cavity.

Anna Rosławska^1,2, Pablo Merino^1,3,4, Abhishek Grewal¹

¹Max-Planck-Institut für Festkörperforschung, D-70569 Stuttgart, Germany.

|August 24, 2021

Summary

Spontaneous atomic rearrangements in plasmon-enhanced electroluminescence cause intensity fluctuations. These findings are crucial for understanding atomic-scale spectroscopies and intensity blinking in picocavities.

Keywords:

atomic-scale structure picocavity plasmonics point contacts

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Published on: September 27, 2011

Area of Science:

Condensed Matter Physics
Surface Science
Plasmonics

Background:

Optical spectromicroscopies achieve atomic resolution via plasmonic enhancement.
Spontaneous intensity fluctuations can perturb these measurements.

Purpose of the Study:

Investigate intensity fluctuations in plasmonic electroluminescence at the single-atom limit.
Understand the role of atomic rearrangements in these fluctuations.

Main Methods:

Utilized a low-temperature scanning tunneling microscope for high precision.
Performed controlled single-atom transfer experiments.
Formed well-defined atomic contacts with multiple quanta of conductance.

Main Results:

Observed changes in electroluminescence intensity linked to atomic rearrangements.
Identified contributions from electronic conductance, plasmonic excitation, and optical antenna properties.
Demonstrated fluctuations originating from minute atomic rearrangements at the contact.

Conclusions:

Minute atomic rearrangements significantly impact plasmonic electroluminescence intensity.
These findings explain spontaneous intensity variations in plasmon-enhanced atomic-scale spectroscopies.
Provides insights into intensity blinking phenomena in picocavities.