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|Title:||Experimental observation of superscattering||Authors:||Qian, Chao
|Issue Date:||2019||Source:||Qian, C., Lin, X., Yang, Y., Xiong, X., Wang, H., Li, E., . . . Chen, H. (2019). Experimental observation of superscattering. Physical Review Letters, 122(6), 063901-. doi:10.1103/PhysRevLett.122.063901||Series/Report no.:||Physical Review Letters||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.||URI:||https://hdl.handle.net/10356/105195
|ISSN:||0031-9007||DOI:||10.1103/PhysRevLett.122.063901||Rights:||© 2019 American Physical Society. All rights reserved. This paper was published in Physical Review Letters and is made available with permission of American Physical Society.||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||SPMS Journal Articles|
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