Multifrequency Superscattering from Subwavelength Hyperbolic Structures
Name
Multifrequency_Superscattering_from_Subwavelength_.pdf
Description
Accepted version
Size
1.91 MB
Format
Adobe PDF
Checksum (MD5)
aba52d6f6ec219537a83474604efc8b2
Author(s)
Qian, Chao
Lin, Xiao
Yang, Yi
Gao, Fei
Shen, Yichen
Lopez, Josue
Kaminer, Ido
Zhang, Baile
Li, Erping
Soljačić, Marin
Date Issued
2018
Journal
ACS Photonics
Publisher
American Chemical Society (ACS)
Version
Author's final manuscript
Abstract
© 2018 American Chemical Society. Superscattering, that is, a phenomenon of the scattering cross section from a subwavelength object exceeding the single-channel limit, has important prospects in enhanced sensing/spectroscopy, solar cells, and biomedical imaging. Superscattering can be typically constructed only at a single frequency regime, and depends critically on the inescapable material losses. Under such realistic conditions, superscattering has not been predicted nor observed to exist simultaneously at multiple frequency regimes. Here we introduce multifrequency superscattering in a subwavelength hyperbolic structure, which can be made from artificial metamaterials or from naturally existing materials, such as hexagonal boron nitride (BN), and show the advantage of such hyperbolic materials for reducing structural complexity. The underlying mechanism is revealed to be the multimode resonances at multiple frequency regimes as appear in BN due to the peculiar dispersion of phonon-polaritons. Importantly, the multifrequency superscattering has a high tolerance to material losses and some structural variations, bringing the concept of multifrequency superscattering closer to useful and realistic conditions.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Terms of Use
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/ACSPHOTONICS.7B01534
