Manipulation and Steering of Hyperbolic Surface Polaritons in Hexagonal Boron Nitride |
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| Authors: | Siyuan Dai Mykhailo Tymchenko Yafang Yang Qiong Ma Marta Pita‐Vidal Kenji Watanabe Takashi Taniguchi Pablo Jarillo‐Herrero Michael M. Fogler Andrea Alù Dimitri N. Basov |
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| Affiliation: | 1. Department of Physics, University of California, San Diego, La Jolla, CA, USA;2. Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, TX, USA;3. Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA;4. National Institute for Materials Science, Tsukuba, Ibaraki, Japan;5. Department of Physics, Columbia University, New York, NY, USA |
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| Abstract: | 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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| Keywords: | hexagonal boron nitride hyperbolic surface polaritons polariton steering |
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