Journal article

Acoustic Vibrations and Energy Dissipation Mechanisms for Lithographically Fabricated Plasmonic Nanostructures Revealed by Single-Particle Transient Extinction Spectroscopy

Man-Nung Su, Behnaz Ostovar, Niklas Gross, John E Sader, Wei-Shun Chang, Stephan Link

JOURNAL OF PHYSICAL CHEMISTRY C | AMER CHEMICAL SOC | Published : 2021

Abstract

Acoustic vibrations in plasmonic nanostructures provide deep insight into mechanical properties at the nanoscale for potential applications including optomechanical devices. Lithographic fabrication of plasmonic nanostructures allows precise control over shape and size as well as position. Here, we present a summary of our recent ultrafast studies of lithographically fabricated Au and Al nanostructures using single-particle transient extinction spectroscopy to measure the size- and shape-dependent acoustic frequencies and homogeneous damping times. Electron-beam lithography coupling with single-particle measurements necessitate the presence of a substrate, which we found to cause a blue shif..

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University of Melbourne Researchers

Grants

Awarded by Robert A. Welch Foundation


Awarded by Air Force Office of Scientific Research via the Department of Defense Multidisciplinary University Research Initiative


Awarded by Army Research Office via the Department of Defense Multidisciplinary University Research Initiative


Awarded by National Science Foundation


Awarded by UMass Dartmouth's Marine and Undersea Technology (MUST) Research Program - Office of Naval Research


Awarded by Australian Research Council Centre of Excellence in Exciton Science


Funding Acknowledgements

We acknowledge financial support from the Robert A. Welch Foundation (C-1664), the Air Force Office of Scientific Research via the Department of Defense Multidisciplinary University Research Initiative (FA9550-15-1-0022), the Army Research Office via the Department of Defense Multidisciplinary University Research Initiative (W911NF-12-1-0407), and the National Science Foundation (ECCS1608917). W. S.C. acknowledges financial support from UMass Dartmouth's Marine and Undersea Technology (MUST) Research Program funded by the Office of Naval Research (N00014-20-1-2170) and the startup funds from the University of Massachusetts Dartmouth. J.E.S. acknowledges support from the Australian Research Council Centre of Excellence in Exciton Science (Grant No. CE170100026) and the Australian Research Council Grants Scheme. We would like to thank Dr. Chongyue Yi, a former member of the Link group, as well as our collaborators, Prof. Naomi Halas, Prof. Peter Nordlander, Prof. Christy Landes, Prof. Ravishankar Sundararaman, and Prof. Prineha Narang, who have contributed to the research summarized here.