Topological Spaser

Abstract

We theoretically introduce a topological spaser, which consists of a hexagonal array of plasmonic metal nanoshells containing an achiral gain medium in their cores. Such a spaser can generate two mutually time-reversed chiral surface plasmon modes in the $\mathbf{K}$- and ${\mathbf{K}}^{\prime }$-valleys, which carry the opposite topological charges, $\pm 1$, and are described by a two-dimensional $E^{\prime }$ representation of the $D_{3h}$ point symmetry group. Due to the mode competition, this spaser exhibits a bistability: only one of these two modes generates, which is a spontaneous symmetry breaking. Such a spaser can be used for an ultrafast all-optical memory and information processing

9 pages, 7 figures

References in corpus (9)

• 2D materials and van der Waals heterostructures
• Berry Phase Effects on Electronic Properties
• Coherent meta-materials and the lasing spaser
• Room temperature plasmon laser by total internal reflection
• Spaser as Nanoscale Quantum Generator and Ultrafast Amplifier
• Chiral plasmons without magnetic field
• Lasing at the K-points of a honeycomb plasmonic lattice
• Magneto-optical spaser
• Single-crystalline aluminum film for ultraviolet plasmonic nanolasers

Cited by in corpus (1)

• Topological Microlaser with A non-Hermitian Topological Bulk