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Stevenson PR, Du M, Cherqui C, Bourgeois MR, Rodriguez K, Neff JR, Abreu E, Meiler IM, Tamma VA, Apkarian VA, Schatz GC, Yuen-Zhou J, Shumaker-Parry JS. Active Plasmonics and Active Chiral Plasmonics through Orientation-Dependent Multipolar Interactions. ACS Nano 2020; 14:11518-11532. [PMID: 32790353 DOI: 10.1021/acsnano.0c03971] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
While most active plasmonic efforts focus on responsive metamaterials to modulate optical response, we present a simple alternative based on applied orientation control that can likely be implemented for many passive plasmonic materials. Passive plasmonic motifs are simpler to prepare but cannot be altered postfabrication. We show that such systems can be easily manipulated through substrate orientation control to generate both active plasmonic and active chiral plasmonic responses. Using gold nanocrescents as our model platform, we demonstrate tuning of optical extinction from -21% to +36% at oblique incidence relative to normal incidence. Variation of substrate orientation in relation to incident polarization is also demonstrated to controllably switch chiroptical handedness (e.g., Δg = ± 0.55). These active plasmonic responses arise from the multipolar character of resonant modes. In particular, we correlate magnetoelectric and dipole-quadrupole polarizabilities with different light-matter orientation-dependence in both near- and far-field localized surface plasmon activity. Additionally, the attribution of far-field optical response to higher-order multipoles highlights the sensitivity offered by these orientation-dependent characterization techniques to probe the influence of localized electromagnetic field gradients on a plasmonic response. The sensitivity afforded by orientation-dependent optical characterization is further observed by the manifestation in both plasmon and chiral plasmon responses of unpredicted structural nanocrescent variance (e.g., left- and right-tip asymmetry) not physically resolved through topographical imaging.
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Affiliation(s)
- Peter R Stevenson
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Matthew Du
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, United States
| | - Charles Cherqui
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Marc R Bourgeois
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Kate Rodriguez
- Department of Chemistry, University of California Irvine, Irvine, California 92697, United States
| | - Jacob R Neff
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Endora Abreu
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Ilse M Meiler
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Venkata Ananth Tamma
- Department of Chemistry, University of California Irvine, Irvine, California 92697, United States
| | - Vartkess Ara Apkarian
- Department of Chemistry, University of California Irvine, Irvine, California 92697, United States
| | - George C Schatz
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Joel Yuen-Zhou
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, United States
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