Plasmonic Su-Schrieffer-Heeger chains with strong coupling amplitudes.

ABSTRACT: Plasmonic many-particle systems with precisely tuned resonances and coupling strengths can exhibit emergent collective properties governed by universal principles. In one-dimensional chains with alternating couplings, known as Su-Schrieffer-Heeger (SSH) systems, this includes the formation of topologically protected mid-gap modes whose intensities localize at the chain's ends. This subwavelength localization at optical frequencies is crucial for achieving strong coupling of mid-gap modes to two-level systems under ambient conditions, extending topological protection to hybrid light-matter states. Here, we have fabricated SSH chains from plasmonic nanoslit resonators with strong interresonator coupling. The alternating distance between the nanoslit resonators is controlled with subnanometer

SUBMITTER: Schurr B 

PROVIDER: S-EPMC12693959 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature