Abstract
Plasmonic sensors based on metallic nanorings benefit from resonances covering a wide spectral range and homogeneous cavity fields. Here, we explore the potential for nanorings in active plasmonics by examining the tunability of plasmon resonances due to external magnetic fields. Within the electrostatic approximation, we compute plasmon resonances and their shifts in magnetic fields for both solid and planar nanorings. In particular, solid nanorings of circular, elliptical, and disk-shaped cross sections are critically examined and compared to planar rings. Overall, we find that magnetoplasmon shifts in nanorings are greatly reduced compared to standard nanoparticles. However, flat geometries are found to be preferable and allow for relatively large shifts.
Original language | English |
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Article number | 085419 |
Journal | Physical Review B |
Volume | 103 |
Issue number | 8 |
ISSN | 2469-9950 |
DOIs | |
Publication status | Published - 12 Feb 2021 |
Bibliographical note
Funding Information:The author acknowledges stimulating discussions with F. Pineider and the QUSCOPE center funded by the Villum foundation for financial support.
Publisher Copyright:
© 2021 American Physical Society.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.