Title: Topological Spaser

Journal Article · · Physical Review Letters

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 K and K' valleys, which carry the opposite topological charges, ± 1, and are described by a two-dimensional $$\textit{E'}$$ 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, and biomedical detection and sensing with chirality resolution.

Research Organization:
Georgia State Univ., Atlanta, GA (United States)
Sponsoring Organization:
National Science Foundation (NSF); US Department of the Navy, Office of Naval Research (ONR); USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
FG02-01ER15213; SC0007043
OSTI ID:
1800015
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 1 Vol. 124; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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