2015/06/30 by Justin C. W. Song, Mark S. Rudner · 1 citation
Engineering · Materials Science · Mathematics · Physics and Astronomy · #Condensed matter physics #Field (mathematics) #Magnetic field #Mathematics #Metamaterials and Metasurfaces Applications #Optics #Physics #Plasmon #Plasmonic and Surface Plasmon Research #Quantum electrodynamics #Quantum mechanics #Topological Materials and Phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1073/pnas.1519086113
published as Proceedings of the National Academy of Sciences (PNAS) 113(17): 4658-4663 (2016) · 10 pgs, 3 fgs
openalex publication_date 2016/04/11 · arxiv created 2016/05/23 · arxiv updated 2016/05/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Plasmons, the collective oscillations of interacting electrons, possess emergent properties that dramatically alter the optical response of metals. We predict the existence of a new class of plasmons-chiral Berry plasmons (CBPs)-for a wide range of 2D metallic systems including gapped Dirac materials. As we show, in these materials the interplay between Berry curvature and electron-electron interactions yields chiral plasmonic modes at zero magnetic field. The CBP modes are confined to system boundaries, even in the absence of topological edge states, with chirality manifested in split energy dispersions for oppositely directed plasmon waves. We unveil a rich CBP phenomenology and propose setups for realizing them, including in anomalous Hall metals and optically pumped 2D Dirac materials. Realization of CBPs will offer a powerful paradigm for magnetic field-free, subwavelength optical nonreciprocity, in the mid-IR to terahertz range, with tunable splittings as large as tens of THz, as well as sensitive all-optical diagnostics of topological bands.