Manipulation and steering of hyperbolic surface polaritons in hexagonal boron nitride

Abstract

Hexagonal boron nitride (hBN) is a natural hyperbolic material that supports both volume-confined hyperbolic polaritons (HPs) and sidewall-confined hyperbolic surface polaritons (HSPs). In this work, we demonstrate effective excitation, control and steering of HSPs in hBN through engineering the geometry and orientation of hBN sidewalls. By combining infrared (IR) nano-imaging and numerical simulations, we investigate the reflection, transmission and scattering of HSPs at the hBN corners with various apex angles. We show that the sidewall-confined nature of HSPs enables a high degree of control over their propagation by designing the geometry of hBN nanostructures.

arXiv comment16 pages, 4 figures

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• Phase change materials for nano-polaritonics: a case study of hBN/VO2 heterostructures
• New horizons in near-zero refractive index photonics and hyperbolic metamaterials
• Layer-Resolved Absorption of Light in Arbitrarily Anisotropic Heterostructures
• Internal nanostructure diagnosis with hyperbolic phonon polaritons in hexagonal boron nitride
• Non-Reciprocal Hyperbolic Propagation over Moving Metasurfaces
• Oriented Asymmetric Wave Propagation and Refraction Bending in Hyperbolic Media
• Resonant Raman scattering of surface phonon polaritons mediated by excitons in WSe${}_2$ films
• Second Harmonic Generation from Grating-Coupled Hybrid Plasmon-Phonon Polaritons
• A mid-infrared biaxial hyperbolic van der Waals crystal