Journal article

Strong vibrational coupling in room temperature plasmonic resonators

Junzhong Wang, Kuai Yu, Yang Yang, Gregory Hartland, John E Sader, Guo Ping Wang

NATURE COMMUNICATIONS | NATURE PUBLISHING GROUP | Published : 2019

Abstract

Strong vibrational coupling has been realized in a variety of mechanical systems. However, there have been no experimental observations of strong coupling of the acoustic modes of plasmonic nanostructures, due to rapid energy dissipation in these systems. Here we realized strong vibrational coupling in ultra-high frequency plasmonic nanoresonators by increasing the vibrational quality factors by an order of magnitude. We achieved the highest frequency quality factor products of f × Q = 1.0 × 1013 Hz for the fundamental mechanical modes, which exceeds the value of 0.6 × 1013 Hz required for ground state cooling. Avoided crossing was observed between vibrational modes of two plasmonic nanoreso..

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University of Melbourne Researchers

Grants

Awarded by National Natural Science Foundation of China (NSFC)


Awarded by Science and Technology Innovation Commission of Shenzhen


Awarded by Natural Science Foundation of SZU


Awarded by US National Science Foundation


Awarded by Australian Research Council Centre of Excellence in Exciton Science


Funding Acknowledgements

This work was supported by the National Natural Science Foundation of China (NSFC) (Grant Nos. 61705133, 11734012, 11574218, 51502280), the Science and Technology Innovation Commission of Shenzhen (Grant No. JCYJ20170818143739628), and Natural Science Foundation of SZU (Grant No. 827/000267). G.V.H. acknowledges the support of the US National Science Foundation through award CHE-1502848. J.E.S. acknowledges support from the Australian Research Council Centre of Excellence in Exciton Science (CE170100026) and the Australian Research Council Grants Scheme.