Extreme nonlinear optical enhancement in chalcogenide glass fibers with deep-subwavelength metallic nanowires

TL;DR

This paper proposes a nanostructured chalcogenide-metal optical fiber with deep-subwavelength metallic nanowires, demonstrating extreme nonlinear optical enhancement through a guided plasmonic mode, enabling strong light-matter interactions with minimal metal content.

Contribution

Introduction of a hybrid nanofiber design with periodic metallic nanowires that significantly enhances nonlinear optical effects compared to traditional fibers.

Findings

Supports a guided collective plasmonic mode

Achieves subwavelength field confinement

Enables extreme nonlinear light-matter interactions

Abstract

A nanostructured chalcogenide-metal optical fiber is proposed. This hybrid nanofiber is embedded with a periodic array of triangular-shaped deep-subwavelength metallic nanowires set up in a bowtie configuration. Our simulations show that the proposed nanostructured fiber supports a guided collective plasmonic mode enabling both subwavelength field confinement and extreme nonlinear light- matter interactions, much larger than a bare chalcogenide nanowire of comparable diameter. This is all achieved with less than 3% by volume of metal content.