Twisted Nano-Optics: Manipulating Light at the Nanoscale with Twisted Phonon Polaritonic Slabs
Jiahua Duan, Nathaniel Capote‐Robayna, Javier Taboada‐Gutiérrez, Gonzalo Álvarez‐Pérez, Iván Prieto, Javier Martín‐Sánchez, Alexey Y. Nikitin, Pablo Alonso‐González
Abstract
) supporting anisotropic phonon polaritons (PhPs), and image the propagation of the latter when launched by localized sources. Our images reveal that, under a critical angle, the PhPs isofrequency curve undergoes a topological transition, in which the propagation of PhPs is strongly guided (canalization regime) along predetermined directions without geometric spreading. These results demonstrate a new degree of freedom (twist angle) for controlling the propagation of polaritons at the nanoscale with potential for nanoimaging, (bio)-sensing, or heat management.
Topics & Concepts
Nanoscopic scalePhononNano-Materials sciencePolaritonNanotechnologyNanophotonicsOptoelectronicsOpticsCondensed matter physicsPhysicsComposite materialPlasmonic and Surface Plasmon ResearchStrong Light-Matter InteractionsThermal Radiation and Cooling Technologies