Low-Loss Plasmonic Dielectric Nanoresonators
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nanoresonators_NanoLett.pdf
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1.95 MB
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Checksum (MD5)
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Author(s)
Miller, Owen D.
Yang, Yi
Christensen, Thomas
Joannopoulos, John
Soljacic, Marin
Date Issued
May 2017
Journal
Nano Letters
Publisher
American Chemical Society (ACS)
Citation
Yang, Yi et al. “Low-Loss Plasmonic Dielectric Nanoresonators.” Nano Letters 17, 5 (April 2017): 3238–3245 © 2017 American Chemical Society
Version
Author's final manuscript
Abstract
Material losses in metals are a central bottleneck in plasmonics for many applications. Here we propose and theoretically demonstrate that metal losses can be successfully mitigated with dielectric particles on metallic films, giving rise to hybrid dielectric-metal resonances. In the far field, they yield strong and efficient scattering, beyond even the theoretical limits of all-metal and all-dielectric structures. In the near field, they offer high Purcell factor (>5000), high quantum efficiency (>90%), and highly directional emission at visible and infrared wavelengths. Their quality factors can be readily tailored from plasmonic-like (∼10) to dielectric-like (∼103), with wide control over the individual resonant coupling to photon, plasmon, and dissipative channels. Compared with conventional plasmonic nanostructures, such resonances show robustness against detrimental nonlocal effects and provide higher field enhancement at extreme nanoscopic sizes and spacings. These hybrid resonances equip plasmonics with high efficiency, which has been the predominant goal since the field’s inception. Keywords: light scattering; nanoantennas; Nanoparticles; nonlocality; radiative efficiency; spontaneous emission
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Research Laboratory of Electronics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1021/ACS.NANOLETT.7B00852
