Publication detail

Structural and optical properties of monocrystalline and polycrystalline gold plasmonic nanorods

KEJÍK, L. HORÁK, M. ŠIKOLA, T. KŘÁPEK, V.

Original Title

Structural and optical properties of monocrystalline and polycrystalline gold plasmonic nanorods

Type

journal article in Web of Science

Language

English

Original Abstract

The quality of lithographically prepared structures is intimately related to the properties of the metal film from which they are fabricated. Here we compare two kinds of thin gold films on a silicon nitride membrane: a conventional polycrystalline thin film deposited by magnetron sputtering and monocrystalline gold microplates that were chemically synthesised directly on the membrane’s surface for the first time. Both pristine metals were used to fabricate plasmonic nanorods using focused ion beam lithography. The structural and optical properties of the nanorods were characterized by analytical transmission electron microscopy including electron energy loss spectroscopy. The dimensions of the nanorods in both substrates reproduced well the designed size of 240 × 80 nm 2 with the deviations up to 20nm in both length and width. The shape reproducibility was considerably improved among monocrystalline nanorods fabricated from the same microplate. Interestingly, monocrystalline nanorods featured inclined boundaries while the boundaries of the polycrystalline nanorods were upright. Q factors and peak loss probabilities of the modes in both structures are within the experimental uncertainty identical. We demonstrate that the optical response of the plasmonic nanorods is not deteriorated when the polycrystalline metal is used instead of the monocrystalline metal.

Keywords

plasmonics; nanoantennas; gold; monocrystalline

Authors

KEJÍK, L.; HORÁK, M.; ŠIKOLA, T.; KŘÁPEK, V.

Released

3. 11. 2020

Publisher

The Optical Society

ISBN

1094-4087

Periodical

OPTICS EXPRESS

Year of study

28

Number

23

State

United States of America

Pages from

34960

Pages to

34972

Pages count

13

URL

https://doi.org/10.1364/OE.409428

Full text in the Digital Library

http://hdl.handle.net/11012/195638

BibTex

@article{BUT165933,
  author="Lukáš {Kejík} and Michal {Horák} and Tomáš {Šikola} and Vlastimil {Křápek}",
  title="Structural and optical properties of monocrystalline and polycrystalline gold plasmonic nanorods",
  journal="OPTICS EXPRESS",
  year="2020",
  volume="28",
  number="23",
  pages="34960--34972",
  doi="10.1364/OE.409428",
  issn="1094-4087",
  url="https://doi.org/10.1364/OE.409428"
}