Arumugam, M (2022) Tailoring Mie Resonances in Cupric Oxide Particles for Use as Nanoantennas. Tailoring Mie Resonances in Cupric Oxide Particles for Use as Nanoantennas.

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Abstract

The field of nano-optics has grown with plasmonic metals. Metals such as silver, gold, and
copper nanoparticles, can concentrate electromagnetic (EM) fields at the nanoscale, due to the
special property called localized surface plasmon resonance (LSPR). This laid the foundation for
a wide range of applications, including nanoscale optics, solar energy harvesting, photocatalysis,
and biosensing. However, there are inherent problems associated with plasmonic metals, such as
high heating losses, and their inability to be scaled-up like semiconductor fabrication processes.
In addition, the field enhancement is restricted only to electric fields. All together these inhibit the
broader use of PMNs in practical applications. In this work, we report submicron cupric oxide
(CuO) particles with a medium refractive index that can exhibit strong electric and magnetic Mie
resonances with strong extinction/scattering cross-sections comparable to or slightly exceeding
those of their plasmonic counterparts. Through the development of particle synthesis techniques
with strong shape and size control, optical spectroscopy, and finite-difference-time-domain
simulations we show that the Mie resonance peak wavelengths are size- and shape-dependent. This
gives tunability in the visible to near-infrared regions for harvesting a wider fraction of the solar
spectrum. Therefore, submicron CuO particles exhibit strong potential in emerging as high�performance alternatives to PMNs. The strong electric and magnetic Mie-resonance-mediated
nanoantenna effect attribute that CuO particles can be potentially used in a plethora of applications,
including surface-enhance Raman spectroscopy, metamaterials, photocatalysis, and photovoltaics

Item Type: Article
Divisions: PSG College of Arts and Science > Department of Chemistry
Depositing User: Mr Team Mosys
Date Deposited: 05 May 2025 08:33
Last Modified: 05 May 2025 08:33
URI: https://ir.psgcas.ac.in/id/eprint/2407

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