Optical Regulation of Chiral-Induced Spin Selectivity

TL;DR

This paper develops a non-perturbative theoretical framework to understand how strong light-matter interactions influence chiral-induced spin selectivity (CISS), revealing that light can both enhance or suppress CISS through spin-dependent Lorentz forces.

Contribution

It introduces a novel non-perturbative theory linking light-induced Lorentz forces and spin-orbital coupling to CISS regulation, verified by Floquet SOC calculations.

Findings

Light can have opposite effects on CISS.

Differences in CISS are due to steady states of nuclei coupled to electrons.

Light-induced Lorentz forces cause these steady state differences.

Abstract

We present a non-perturbative theory that describes how light regulates chiral-induced spin selectivity (CISS) from the perspective of strong light-matter interactions. The research results indicate that 1) light can have opposite effects on the CISS, 2) the difference in CISS is caused by the steady states of nuclei coupled to spin electrons and 3) this steady state differences are caused by the different light-induced Lorentz forces felt by spin-up and spin-down electrons. The fundamental reason for these results is the impact of light on spin-orbital coupling (SOC), which is a complex process. This theoretical framework is verified by the calculations of Floquet SOC non-adiabatic nuclear dynamics.