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Issue 11, 2016
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Polarisation-independent enhanced scattering by tailoring asymmetric plasmonic systems

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Abstract

Polarised light provides an efficient way for dynamic control over local optical properties of nanoscale plasmonic structures. Yet many applications that utilise control over the plasmonic near-field would benefit if the plasmonic device maintained the same magnitude of optical response for all polarisations. Here we show that completely asymmetric nanostructures can be designed to exhibit a broadband polarisation-independent and enhanced optical response. We provide both analytical and experimental results on two sets of plasmonic trimer nanostructures consisting of unequal nanodisks/apertures with different gap spacing. We show that, at certain inter-particle separations, enhanced far-field cross sections are independent to the incident polarisation, while still demonstrating nontrivial near-field control.

Graphical abstract: Polarisation-independent enhanced scattering by tailoring asymmetric plasmonic systems

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Publication details

The article was received on 04 Jan 2016, accepted on 22 Feb 2016 and first published on 23 Feb 2016


Article type: Paper
DOI: 10.1039/C6NR00029K
Citation: Nanoscale, 2016,8, 6021-6027
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    Polarisation-independent enhanced scattering by tailoring asymmetric plasmonic systems

    G. Geraci, B. Hopkins, A. E. Miroshnichenko, B. Erkihun, D. N. Neshev, Y. S. Kivshar, S. A. Maier and M. Rahmani, Nanoscale, 2016, 8, 6021
    DOI: 10.1039/C6NR00029K

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