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|Title:||Multifrequency superscattering from subwavelength hyperbolic structures||Authors:||Qian, Chao
|Issue Date:||2018||Source:||Qian, C., Lin, X., Yang, Y., Gao, F., Shen, Y., Lopez, J., . . . Chen, H. (2018). Multifrequency superscattering from subwavelength hyperbolic structures. ACS Photonics, 5(4), 1506-1511. doi:10.1021/acsphotonics.7b01534||Series/Report no.:||ACS Photonics||Abstract:||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.||URI:||https://hdl.handle.net/10356/85189
|DOI:||http://dx.doi.org/10.1021/acsphotonics.7b01534||Rights:||This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Photonics, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsphotonics.7b01534||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||SPMS Journal Articles|
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