Chiral Plasmonic Pinwheels Exhibit Orientation-Independent Linear Differential Scattering under Asymmetric Illumination

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dc.citation.firstpage30en_US
dc.citation.issueNumber1en_US
dc.citation.journalTitleChemical & Biomedical Imagingen_US
dc.citation.lastpage39en_US
dc.citation.volumeNumber1en_US
dc.contributor.authorMcCarthy, Lauren A.en_US
dc.contributor.authorVerma, Ojasvien_US
dc.contributor.authorNaidu, Gopal Narmadaen_US
dc.contributor.authorBursi, Lucaen_US
dc.contributor.authorAlabastri, Alessandroen_US
dc.contributor.authorNordlander, Peteren_US
dc.contributor.authorLink, Stephanen_US
dc.date.accessioned2024-08-02T13:32:09Zen_US
dc.date.available2024-08-02T13:32:09Zen_US
dc.date.issued2023en_US
dc.description.abstractPlasmonic nanoantennas have considerably stronger polarization-dependent optical properties than their molecular counterparts, inspiring photonic platforms for enhancing molecular dichroism and providing fundamental insight into light-matter interactions. One such insight is that even achiral nanoparticles can yield strong optical activity when they are asymmetrically illuminated from a single oblique angle instead of evenly illuminated. This effect, called extrinsic chirality, results from the overall chirality of the experimental geometry and strongly depends on the orientation of the incident light. Although extrinsic chirality has been well-characterized, an analogous effect involving linear polarization sensitivity has not yet been discussed. In this study, we investigate the differential scattering of rotationally symmetric chiral plasmonic pinwheels when asymmetrically irradiated with linearly polarized light. Despite their high rotational symmetry, we observe substantial linear differential scattering that is maintained over all pinwheel orientations. We demonstrate that this orientation-independent linear differential scattering arises from the broken mirror and rotational symmetries of our overall experimental geometry. Our results underscore the necessity of considering both the rotational symmetry of the nanoantenna and the experimental setup, including illumination direction and angle, when performing plasmon-enhanced chiroptical characterizations. Our results demonstrate spectroscopic signatures of an effect analogous to extrinsic chirality for linear polarizations.en_US
dc.identifier.citationMcCarthy, L. A., Verma, O., Naidu, G. N., Bursi, L., Alabastri, A., Nordlander, P., & Link, S. (2023). Chiral Plasmonic Pinwheels Exhibit Orientation-Independent Linear Differential Scattering under Asymmetric Illumination. Chemical & Biomedical Imaging, 1(1), 30–39. https://doi.org/10.1021/cbmi.2c00005en_US
dc.identifier.digitalmccarthy-et-al-2023en_US
dc.identifier.doihttps://doi.org/10.1021/cbmi.2c00005en_US
dc.identifier.urihttps://hdl.handle.net/1911/117576en_US
dc.language.isoengen_US
dc.publisherAmerican Chemical Societyen_US
dc.rightsExcept where otherwise noted, this work is licensed under a Creative Commons Attribution (CC BY) license.  Permission to reuse, publish, or reproduce the work beyond the terms of the license or beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleChiral Plasmonic Pinwheels Exhibit Orientation-Independent Linear Differential Scattering under Asymmetric Illuminationen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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