Disordered ensembles of strongly coupled single-molecule plasmonic picocavities as nonlinear optical metamaterials

Author:

Herrera Felipe12ORCID,Litinskaya Marina3ORCID

Affiliation:

1. Department of Physics, Universidad de Santiago de Chile, Av. Ecuador, 3493 Santiago, Chile

2. ANID-Millennium Institute for Research in Optics, Concepción, Chile

3. Department of Physics & Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada

Abstract

We propose to use molecular picocavity ensembles as macroscopic coherent nonlinear optical devices enabled by nanoscale strong coupling. For a generic picocavity model that includes molecular and photonic disorder, we derive theoretical performance bounds for coherent cross-phase modulation signals using weak classical fields of different frequencies. We show that strong coupling of the picocavity vacua with a specific vibronic sideband in the molecular emission spectrum results in a significant variation of the effective refractive index of the metamaterial relative to a molecule-free scenario due to a vacuum-induced Autler–Townes effect. For a realistic molecular disorder model, we demonstrate that cross-phase modulation of optical fields as weak as 10 kW/cm2is feasible using dilute ensembles of molecular picocavities at room temperature, provided that the confined vacuum is not resonantly driven by the external probe field. Our work paves the way for the development of plasmonic metamaterials that exploit strong coupling for optical state preparation and quantum control.

Funder

Fondo Nacional de Desarrollo Cientifico y Tecnologico

Millennium Science Initiative Program

Publisher

AIP Publishing

Subject

Physical and Theoretical Chemistry,General Physics and Astronomy

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