Plasmonic properties of gold nanostructures on Hf-doped ZnO film and its application for refractive index sensing with a high figure of merit

This paper reports a systematic study of the plasmonic properties of periodic arrays of gold nanoparticles in contact with a novel transparent conducting oxide (TCO) material - Hafnium-doped zinc oxide (HZO). Resonant coupling of the grating diffraction orders with the propagating surface plasmons a...

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Bibliographic Details
Published inOptical materials express Vol. 12; no. 6; p. 2127
Main Authors Venugopalan, Priyamvada, kumar, Sunil
Format Journal Article
LanguageEnglish
Published Washington Optical Society of America 01.06.2022
Subjects
Figure of merit
Gold
Nanoparticles
Plasmonics
Plasmons
Refractivity
Substrates
Wave propagation
Waveguides
Zinc oxide
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Summary:This paper reports a systematic study of the plasmonic properties of periodic arrays of gold nanoparticles in contact with a novel transparent conducting oxide (TCO) material - Hafnium-doped zinc oxide (HZO). Resonant coupling of the grating diffraction orders with the propagating surface plasmons along the waveguide film, which can generate large field enhancements, are investigated by FDTD simulations. By tuning the ratio of Hf dopants to ZnO film, the plasmon resonances can be tuned and narrower resonance with FWHM of 2-5 nm are observed. Such plasmonic substrates are shown in this study to have high figure of merit in refractive index sensing applications.
ISSN:2159-3930
2159-3930
DOI:10.1364/OME.457104