2020/04/30 by Jiahua Duan, Nathaniel Capote‐Robayna, Nathaniel Capote-Robayna +11 · 230 citations
Engineering · Physics and Astronomy · #Composite material #Condensed matter physics #Materials science #Nano- #Nanophotonics #Nanoscopic scale #Nanotechnology #Optics #Optoelectronics #Phonon #Physics #Plasmonic and Surface Plasmon Research #Polariton #Strong Light-Matter Interactions #Thermal Radiation and Cooling Technologies #cond-mat.mes-hall #physics.optics
paper · pdf · doi:10.1021/acs.nanolett.0c01673
published in Nano Letters 20(7), 5323-5329 (American Chemical Society)
openalex publication_date 2020/06/12 · arxiv created 2020/07/07 · arxiv updated 2020/07/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/08
) 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.