Ultrastrong coupling between nanoparticle plasmons and cavity photons at ambient conditions.

ABSTRACT: Ultrastrong coupling is a distinct regime of electromagnetic interaction that enables a rich variety of intriguing physical phenomena. Traditionally, this regime has been reached by coupling intersubband transitions of multiple quantum wells, superconducting artificial atoms, or two-dimensional electron gases to microcavity resonators. However, employing these platforms requires demanding experimental conditions such as cryogenic temperatures, strong magnetic fields, and high vacuum. Here, we use a plasmonic nanorod array positioned at the antinode of a resonant optical Fabry-Pérot microcavity to reach the ultrastrong coupling (USC) regime at ambient conditions and without the use of magnetic fields. From optical measurements we extract the value of the interaction strength over the transi

SUBMITTER: Baranov DG 

PROVIDER: S-EPMC7264206 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature