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High-Q plasmonic nanowire-on-mirror resonators by atomically smooth single-crystalline silver flakes

Title data

Schörner, Christian ; Lippitz, Markus:
High-Q plasmonic nanowire-on-mirror resonators by atomically smooth single-crystalline silver flakes.
In: The Journal of Chemical Physics. Vol. 155 (December 2021) Issue 23 . - No. 234202.
ISSN 0021-9606
DOI: https://doi.org/10.1063/5.0074387

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Abstract in another language

Plasmonic nanoparticles in close vicinity to a metal surface confine light to nanoscale volumes within the insulating gap. With gap sizes in the range of a few nanometers or below, atomic-scale dynamical phenomena within the nanogap come into reach. However, at these tiny scales, an ultra-smooth material is a crucial requirement. Here, we demonstrate large-scale (50 μm) single-crystalline silver flakes with a truly atomically smooth surface, which are an ideal platform for vertically assembled silver plasmonic nanoresonators. We investigate crystalline silver nanowires in a sub-2 nm separation to the silver surface and observe narrow plasmonic resonances with a quality factor Q of about 20. We propose a concept toward the observation of the spectral diffusion of the lowest-frequency cavity plasmon resonance and present first measurements. Our study demonstrates the benefit of using purely crystalline silver for plasmonic nanoparticle-on-mirror resonators and further paves the way toward the observation of dynamic phenomena within a nanoscale gap.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics III - Nanooptics > Chair Experimental Physics III - Nanooptics - Univ.-Prof. Dr. Markus Lippitz
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 08 Feb 2022 07:23
Last Modified: 08 Feb 2022 07:23
URI: https://eref.uni-bayreuth.de/id/eprint/68205