Issue 1, 2022

Superchiral hot-spots in “real” chiral plasmonic structures

Abstract

Light scattering from chiral plasmonic structures can create near fields with an asymmetry greater than the equivalent circularly polarised light, a property sometimes referred to as superchirality. These near fields with enhanced chiral asymmetries can be exploited for ultrasensitive detection of chiral (bio)molecules. In this combined experimental and numerical modelling study, we demonstrate that superchiral hot-spots are created around structural heterogeneities, such as protrusions and indentations, possessed by all real metal structures. These superchiral hot-spots, have chiral asymmetries greater than what would be expected from an idealised perfect structure. Our work indicates that surface morphology could play a role in determining the efficacy of a chiral structure for sensing.

Graphical abstract: Superchiral hot-spots in “real” chiral plasmonic structures

Supplementary files

Article information

Article type
Paper
Submitted
09 9月 2021
Accepted
02 11月 2021
First published
02 11月 2021
This article is Open Access
Creative Commons BY license

Mater. Adv., 2022,3, 346-354

Superchiral hot-spots in “real” chiral plasmonic structures

C. Gilroy, D. J. P. Koyroytsaltis-McQuire, N. Gadegaard, A. S. Karimullah and M. Kadodwala, Mater. Adv., 2022, 3, 346 DOI: 10.1039/D1MA00831E

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements