Quantum mechanical effects in plasmonic structures with subnanometre gaps

Wenqi Zhu, Ruben Esteban, Andrei G. Borisov, Jeremy J. Baumberg, Peter Nordlander, Henri J. Lezec, Javier Aizpurua () and Kenneth B. Crozier ()
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Wenqi Zhu: Center for Nanoscale Science and Technology, National Institute of Standards and Technology
Ruben Esteban: Material Physics Center CSIC-UPV/EHU and Donostia International Physics Center DIPC
Andrei G. Borisov: Material Physics Center CSIC-UPV/EHU and Donostia International Physics Center DIPC
Jeremy J. Baumberg: Nanophotonics Centre, Cavendish Laboratory, University of Cambridge
Peter Nordlander: MS61, Laboratory for Nanophotonics, Rice University
Henri J. Lezec: Center for Nanoscale Science and Technology, National Institute of Standards and Technology
Javier Aizpurua: Material Physics Center CSIC-UPV/EHU and Donostia International Physics Center DIPC
Kenneth B. Crozier: School of Physics, University of Melbourne

Nature Communications, 2016, vol. 7, issue 1, 1-14

Abstract: Abstract Metallic structures with nanogap features have proven highly effective as building blocks for plasmonic systems, as they can provide a wide tuning range of operating frequencies and large near-field enhancements. Recent work has shown that quantum mechanical effects such as electron tunnelling and nonlocal screening become important as the gap distances approach the subnanometre length-scale. Such quantum effects challenge the classical picture of nanogap plasmons and have stimulated a number of theoretical and experimental studies. This review outlines the findings of many groups into quantum mechanical effects in nanogap plasmons, and discusses outstanding challenges and future directions.

Date: 2016
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DOI: 10.1038/ncomms11495

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