Optical properties of single crystal silver thin films on mica for high performance plasmonic devices

We systematically investigate the optical properties of silver films to clear up the inconsistency in the published values of the dielectric function of silver. The silver films were deposited on mica by using a facing target sputtering system, which yielded a large area single crystal of silver sui...

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Bibliographic Details
Published in:Optical materials express 2018-06, Vol.8 (6), p.1642
Main Authors: Uchino, T., Koiwa, T., Ou, J. Y., Fedotov, V. A.
Format: Article
Language:English
Subjects:
Crystal structure
Metamaterials
Mica
Optical properties
Polaritons
Q factors
Single crystals
Surface roughness
Thickness
Thin films
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Summary:We systematically investigate the optical properties of silver films to clear up the inconsistency in the published values of the dielectric function of silver. The silver films were deposited on mica by using a facing target sputtering system, which yielded a large area single crystal of silver suitable for the fabrication of high-finesse plasmonic devices and metamaterials. We confirmed that wide variations in the optical properties of silver were associated with the overall quality of the silver films including crystal structure, thickness, and surface roughness. The quality factor of the surface plasmon polaritons calculated for the obtained single crystal is 5 × 103, which is about five times higher than that for polycrystalline films.
ISSN:2159-3930
2159-3930
DOI:10.1364/OME.8.001642