All-angle negative refraction of highly squeezed plasmon and phonon polaritons in graphene–boron nitride heterostructures
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Author(s)
Chen, Hongsheng
Zhang, Baile
Lin, Xiao
Yang, Yi
Rivera, Nicholas H.
Lopez, Josue Jacob
Shen, Yichen
Kaminer, Ido Efraim
Joannopoulos, John
Soljacic, Marin
Date Issued
June 2017
Journal
Proceedings of the National Academy of Sciences
Publisher
National Academy of Sciences (U.S.)
Citation
Lin, Xiao et al. “All-Angle Negative Refraction of Highly Squeezed Plasmon and Phonon Polaritons in Graphene–boron Nitride Heterostructures.” Proceedings of the National Academy of Sciences 14, 26 (June 2017): 6717-6721 © 2017 National Academy of Sciences
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Final published version
Abstract
A fundamental building block for nanophotonics is the ability to achieve negative refraction of polaritons, because this could enable the demonstration of many unique nanoscale applications such as deep-subwavelength imaging, superlens, and novel guiding. However, to achieve negative refraction of highly squeezed polaritons, such as plasmon polaritons in graphene and phonon polaritons in boron nitride (BN) with their wavelengths squeezed by a factor over 100, requires the ability to flip the sign of their group velocity at will, which is challenging. Here we reveal that the strong coupling between plasmon and phonon polaritons in graphene-BN heterostructures can be used to flip the sign of the group velocity of the resulting hybrid (plasmon-phonon-polariton) modes. We predict allangle negative refraction between plasmon and phonon polaritons and, even more surprisingly, between hybrid graphene plasmons and between hybrid phonon polaritons. Graphene-BN heterostructures thus provide a versatile platform for the design of nanometasurfaces and nanoimaging elements. Keywords: negative refraction; plasmon polariton; phonon polariton; graphene–boron nitride; heterostructure
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Department of Physics
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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/10.1073/PNAS.1701830114
