期刊
ADVANCED MATERIALS
卷 30, 期 16, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201706358
关键词
hexagonal boron nitride; hyperbolic surface polaritons; polariton steering
类别
资金
- Gordon and Betty Moore Foundation's EPiQS Initiative [GBMF4533]
- AFOSR [FA9550-15-1-0478, FA9550-16-1-0382]
- ONR [N00014-15-1-2671]
- AFOSR MURI [FA9550-17-1-0002]
Hexagonal boron nitride (hBN) is a natural hyperbolic material that supports both volume-confined hyperbolic polaritons and sidewall-confined hyperbolic surface polaritons (HSPs). In this work, efficient excitation, control, and steering of HSPs are demonstrated in hBN through engineering the geometry and orientation of hBN sidewalls. By combining infrared nanoimaging and numerical simulations, the reflection, transmission, and scattering of HSPs are investigated at the hBN corners with various apex angles. It is also shown that the sidewall-confined nature of HSPs enables a high degree of control over their propagation by designing the geometry of hBN nanostructures.
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