Exploitation of magnetic dipole resonances in metal–insulator–metal plasmonic nanostructures to selectively filter visible light

Pinton, N., Grant, J. , Collins, S. and Cumming, D. R.S. (2018) Exploitation of magnetic dipole resonances in metal–insulator–metal plasmonic nanostructures to selectively filter visible light. ACS Photonics, 5(4), pp. 1250-1261. (doi: 10.1021/acsphotonics.7b00959)

158280.pdf - Accepted Version



Significant improvement in using plasmonic nanostructures for practical color filtering and multispectral imaging applications is achieved by exploiting the coupling of surface plasmons with dielectric optical cavity resonances within a hexagonal array of subwavelength holes in a thin CMOS-compatible metal–insulator–metal stack. This polarization-independent architecture overcomes the limitations of all previously reported plasmonic color filters, namely poor transmission and broad band-pass characteristic, effectively providing a compact approach for high color accuracy multispectral and filtering technologies. Measured transmission efficiencies up to 60% and full-width at half-maximum between 45 and 55 nm along the entire visible spectrum are achieved, an impressive and unique combination of features that has never been reported before. The nanostructure exploits the phenomenon of extraordinary optical transmission and magnetic dipole modes to efficiently filter visible light. The presence of magnetic resonances in the optical regime is an unusual property, previously reported in photonic metamaterials or dielectric nanoparticles. The physical insights established from the electromagnetic near-field patterns are used to accurately tailor the optical properties of the filters. The nonideality of the fabrication at the nanoscale is addressed, the issues encountered highlighted, and alternative solutions proposed and verified, demonstrating that the working principle of the MIM structure can be successfully extended to other materials and structural parameters.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Cumming, Professor David and Grant, Dr James and Pinton, Nadia
Authors: Pinton, N., Grant, J., Collins, S., and Cumming, D. R.S.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:ACS Photonics
Publisher:American Chemical Society
ISSN (Online):2330-4022
Published Online:26 February 2018
Copyright Holders:Copyright © 2018 American Chemical Society
First Published:First published in ACS Photonics 5(4): 1250-1261
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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