Khan_2020_Characterisation.pdf (12.66 MB)
Characterisation and manipulation of polarisation response in plasmonic and magneto-plasmonic nanostructures and metamaterials
journal contributionposted on 2023-03-02, 15:56 authored by Pritam KhanPritam Khan, Grace Brennan, James Lillis, SYED ANSAR TOFAILSYED ANSAR TOFAIL, Ning Liu, Christophe SilienChristophe Silien
Optical properties of metal nanostructures, governed by the so-called localised surface plasmon resonance(LSPR) eﬀects,have envoked intensive investigations in recent times owing to their fundamental nature and potential applications. LSPR scattering from metal nanostructures is expected to show the symmetry of the oscillation mode and the particle shape. Therefore, information on the polarisation properties of the LSPR scattering is crucial for identifying diﬀerent oscillation modes within one particle and to distinguish diﬀerently shaped particles within one sample. On the contrary, the polarisation state of light itself can be arbitrarily manipulated by the inverse designed sample, known as metamaterials. Apart from polarisation state, external stimulus, e.g., magnetic ﬁeld also controls the LSPR scattering from plasmonic nanostructures, giving rise to a new ﬁeld of magneto-plasmonics. In this review, we pay special attention to polarisation and its eﬀect in three contrasting aspects. First, tailoring between LSPR scattering and symmetry of plasmonic nanostructures, secondly, manipulating polarisation state through metamaterials and lastly, polarisation modulation in magneto-plasmonics. Finally, we will review recent progress in applications of plasmonic and magneto plasmonicnano structures and metamaterials in various ﬁelds.
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