Active Control of Interconversion of Spin and Orbital Angular Momentum of Light by a Scattering System

Abstract

The conversion between spin and orbital angular momentum plays a crucial role in modern science and has a wide range of applications in optical multistate magnetization, optical micromanipulation, classical and quantum optical communications. However, it becomes difficult in many complex environments due to the inherent scattering effect. Here, we experimentally demonstrate the active control of spin and orbital angular-momentum conversion of light by a scattering system. We obtain significant optimization results and prove that the angular-momentum conversion process in scattering medium is tunable and flexible. Our work opens the door for high-dimensional optical information exchange in complex circumstance and paves the way for applications of optical angular momentum in optical communication.