Visualization of Plasmon-Induced Hot Electrons by Scanning Electron Microscopy

Elad Segal; Matan Galanty; Hannah Aharon; Adi Salomon

doi:10.1021/acs.jpcc.9b08202

Visualization of Plasmon-Induced Hot Electrons by Scanning Electron Microscopy

Elad Segal, Matan Galanty, Hannah Aharon, Adi Salomon

Department of Chemistry

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

6 Scopus citations

Abstract

We show that scanning electron microscopy imaging can indicate hot-electron formation in aluminum plasmonic nanostructures composed of five triangular cavities. A very strong secondary electron emission was observed, up to 150 nm from the plasmonic structure. The secondary electron emission depends on the acceleration voltage, the distance between the plasmonic cavities, the metal type, and the roughness of the surface. Furthermore, the formation of hot electrons was used to increase the efficiency of an optoelectronic device.

Original language	English
Pages (from-to)	30528-30535
Number of pages	8
Journal	Journal of Physical Chemistry C
Volume	123
Issue number	50
DOIs	https://doi.org/10.1021/acs.jpcc.9b08202
State	Published - 19 Dec 2019

Bibliographical note

Funding Information:
We thank Dr. David Gachet for the fruitful discussions and important insights (former engineer at Attolight company, Switzerland), Dr. Adam Ginsburg for his help with the TiO 2 pyrolysis procedure, and Dr. David Keller from the BIU chemistry department for assistance with the PV measurements. E.S. thanks the Israeli Ministry of Science and Technology (MOST) for their financial support. This work is supported financially by ISF-NSFC grant no. 2525/17.

Publisher Copyright:
Copyright © 2019 American Chemical Society.

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abstract = "We show that scanning electron microscopy imaging can indicate hot-electron formation in aluminum plasmonic nanostructures composed of five triangular cavities. A very strong secondary electron emission was observed, up to 150 nm from the plasmonic structure. The secondary electron emission depends on the acceleration voltage, the distance between the plasmonic cavities, the metal type, and the roughness of the surface. Furthermore, the formation of hot electrons was used to increase the efficiency of an optoelectronic device.",

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AB - We show that scanning electron microscopy imaging can indicate hot-electron formation in aluminum plasmonic nanostructures composed of five triangular cavities. A very strong secondary electron emission was observed, up to 150 nm from the plasmonic structure. The secondary electron emission depends on the acceleration voltage, the distance between the plasmonic cavities, the metal type, and the roughness of the surface. Furthermore, the formation of hot electrons was used to increase the efficiency of an optoelectronic device.

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Visualization of Plasmon-Induced Hot Electrons by Scanning Electron Microscopy

Abstract

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