Coupling between hyperbolic phonon polaritons excited in two ultrathin hBN sheets

Abstract

In this work, the hyperbolic phonon polaritons (HPPs) in ultrathin hBN sheets are numerically studied. The dispersion relation and distribution of electric field are calculated to confirm the excitation of HPPs. Besides, the coupling effect between HPPs of two ultrathin hBN sheets are investigated. When the distance between two hBN sheets are smaller than the propagation length of the HPPs in the air, the HPPs can be strongly coupled. Therefore, the photon tunneling probability can be greatly enhanced. The split of the HPPs is similar to that of the surface waves, and such phenomenon is well explained in this work. We believe that this work will deepen our understanding of the HPPs in ultrathin hyperbolic materials. In addition, the knowledge about the HPPs will help us understand the near-field radiative heat transfer between hyperbolic materials.

arXiv comment6 figures

References in corpus (6)

• Hyperbolic phonon-polaritons in boron nitride for near-field optical imaging
• Towards a black body for near-field thermal radiation
• Broadband super-Planckian thermal emission from hyperbolic metamaterials
• Configure polaritons in twisted $\alpha$-MoO3
• Tunable light-matter interaction and the role of hyperbolicity in graphene-hBN system
• Analytical approximations for the dispersion of electromagnetic modes in slabs of biaxial crystals