Enantioselective optical forces in gain-functionalized single core-shell chiral nanoparticles

TL;DR

This paper introduces a gain-assisted method for enantioselective optical manipulation of chiral nanoparticles, enabling all-optical chiral resolution and enantioselection without interference, applicable to various plasmonic particles.

Contribution

It presents a novel gain-assisted scheme for enantioselective optical forces that allows tunable chiral resolution and enantioselection in nanoparticles.

Findings

Achieved all-optical chiral resolution of racemic mixtures.

Demonstrated tunable optical pulling and pushing forces.

Applicable to both lossless and lossy plasmonic chiral particles.

Abstract

We propose a gain-assisted enantioselective scheme in dye-doped chiral particles, demonstrating optical pulling and pushing forces that can be tuned using externally controllable parameters. By controlling the concentration of dye molecules and pumping rate, we achieve all-optical chiral resolution of racemic mixtures and enantioselection of small dipolar chiral particles without relying on interference. This scheme is applicable to both lossless and lossy plasmonic chiral particles, making it a promising approach for chiral sensing, drug discovery, and molecular separation.