Please use this identifier to cite or link to this item:
Title: Giant intrinsic chiro-optical activity in planar dielectric nanostructures
Authors: Zhu, A.Y.
Chen, W.T.
Zaidi, A.
Huang, Y.-W. 
Khorasaninejad, M.
Sanjeev, V.
Qiu, C.-W. 
Capasso, F.
Keywords: chiral
extrinsic chirality
optical activity
Issue Date: 2018
Publisher: Springer Nature
Citation: Zhu, A.Y., Chen, W.T., Zaidi, A., Huang, Y.-W., Khorasaninejad, M., Sanjeev, V., Qiu, C.-W., Capasso, F. (2018). Giant intrinsic chiro-optical activity in planar dielectric nanostructures. Light: Science and Applications 7 (2) : 17158. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: The strong optical chirality arising from certain synthetic metamaterials has important and widespread applications in polarization optics, stereochemistry and spintronics. However, these intrinsically chiral metamaterials are restricted to a complicated three-dimensional (3D) geometry, which leads to significant fabrication challenges, particularly at visible wavelengths. Their planar two-dimensional (2D) counterparts are limited by symmetry considerations to operation at oblique angles (extrinsic chirality) and possess significantly weaker chiro-optical responses close to normal incidence. Here, we address the challenge of realizing strong intrinsic chirality from thin, planar dielectric nanostructures. Most notably, we experimentally achieve near-unity circular dichroism with ~90% of the light with the chosen helicity being transmitted at a wavelength of 540 nm. This is the highest value demonstrated to date for any geometry in the visible spectrum. We interpret this result within the charge-current multipole expansion framework and show that the excitation of higher-order multipoles is responsible for the giant circular dichroism. These experimental results enable the realization of high-performance miniaturized chiro-optical components in a scalable manner at optical frequencies. © 2018, The Author(s).
Source Title: Light: Science and Applications
ISSN: 20955545
DOI: 10.1038/lsa.2017.158
Rights: Attribution 4.0 International
Appears in Collections:Elements
Staff Publications

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
10_1038_lsa_2017_158.pdf1.69 MBAdobe PDF



Google ScholarTM



This item is licensed under a Creative Commons License Creative Commons