Experimental Observation of Superscattering
Name
PhysRevLett.122.063901.pdf
Size
1.41 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Qian, Chao
Lin, Xiao
Yang, Yi
Xiong, Xiaoyan
Wang, Huaping
Li, Erping
Zhang, Baile
Chen, Hongsheng
Kaminer, Ido Efraim
Date Issued
February 2019
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Qian, Chao et al. "Experimental Observation of Superscattering." Physical Review Letters 122, 6 (February 2019): 063901 © 2019 American Physical Society
Version
Final published version
Abstract
Superscattering, induced by degenerate resonances, breaks the fundamental single-channel limit of the scattering cross section of subwavelength structures; in principle, an arbitrarily large total cross section can be achieved via superscattering. It thus provides a unique way to strengthen the light-matter interaction at the subwavelength scale, and has many potential applications in sensing, energy harvesting, bioimaging (such as magnetic resonance imaging), communication, and optoelectronics. However, the experimental demonstration of superscattering remains an open challenge due to its vulnerability to structural imperfections and intrinsic material losses. Here we report the first experimental evidence for superscattering by demonstrating the superscattering simultaneously in two different frequency regimes through both the far-field and near-field measurements. The underlying mechanism for the observed superscattering is the degenerate resonances of confined surface waves, by utilizing a subwavelength metasurface-based multilayer structure. Our work paves the way towards practical applications based on superscattering.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.122.063901
