Year: 2024
Type: article
Abstract: We show that rhombohedral multilayer graphene supports topological frequency conversion, whereby a fraction of electrons transfer energy between two monochromatic light sources at a quantized rate. The pristine nature and gate tunability of these materials, along with a Berry curvature that directly couples to electric fields, make them ideal platforms for the experimental realization of topological frequency conversion. Among the rhombohedral family, we find that Bernal bilayer graphene appears most promising for THz-scale applications due to lower dissipation. We discuss strategies to circumvent cancellations between the two valleys of graphene and to minimize dissipative losses using commensurate frequencies, thus opening a potential pathway for net amplification.
Institutions: California Institute of Technology, University of Copenhagen
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G1058888188, G1086096196, G1681062796, G2595738051, G3007828097, QUANTUM STATES IN LAYERED HETEROSTRUCTURES CONTROLLED BY ELECTROSTATIC FIELDS AND STRAIN, G638484911, Emergent Phenomena in Quantum Systems Theory Center, Programs on Critical Problems in Physics, Astrophysics and Biophysics at the Aspen Center for Physics, G8376349051
OpenAlex ID: W4402678142