All-angle negative refraction of highly squeezed plasmon and phonon polaritons in graphene–boron nitride heterostructures
Journal Article
·
· Proceedings of the National Academy of Sciences of the United States of America
- Zhejiang Univ., Hangzhou (China); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Zhejiang Univ., Hangzhou (China)
- Nanyang Technological Univ. (Singapore)
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 all-angle 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.
- Research Organization:
- Krell Inst., Ames, IA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- FG02-97ER25308
- OSTI ID:
- 1465778
- Journal Information:
- Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 26 Vol. 114; ISSN 0027-8424
- Publisher:
- National Academy of Sciences, Washington, DC (United States)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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