光学学报, 2016, 36(10): 1026001, 网络出版: 2016-10-01

自由空间中偏振调制光场的传输及控制

Transmission and Control of Polarization Modulation Light Filed in Free Space
作者单位

西北工业大学理学院陕西省光信息技术重点实验室,教育部空间应用物理与化学重点实验室, 陕西 西安 710072

摘要
光场的偏振态作为光场调控的一个新自由度,逐渐成为研究者们关注的热点。对光场偏振态的非均匀调制可以实现光子自旋-轨道相互耦合,从而发掘很多新的光学现象,其中Pancharatnam-Berry(PB)相位扮演了至关重要的角色。在偏振转换中,光场的不同偏振分量得到不同的PB相位。利用PB相位对光场偏振分量进行波前整形,以控制光场偏振分量的传输,从而在光场传输过程中实现偏振转换、角动量转化、能流控制等。光场偏振调制的相关研究在自旋选择成像、微粒操控、激光微加工、信息传输与修复中具有潜在的应用价值。分析了偏振调制光场的传输和控制原理,总结了近年来国内外的相关研究工作进展。
Abstract
As a new degree of freedom for light manipulation, the polarization state of a light field is gradually becoming a focused issue. The photon spin-orbit intercoupling can be achieved by the non-uniform modulation for the polarization state of the light filed, and then a variety of novel optical phenomena can be explored. Thereinto, the Pancharatnam-Berry (PB) phase plays an important role. In the polarization conversion, different polarization components of the light field are with different PB phases. We can control the transmission of the polarization components of the light field by using PB phases to shape the wave fronts of the polarization components, and achieve the polarization conversion, spin-orbit conversion, and energy flow management in the process of the light transmission. The related research of light polarization modulation has potential application values in spin-selected imaging, particle manipulation, laser micro-processing, and information transmission and recovery. We discuss the mechanism of transmission and manipulation of the polarization modulation light field, and present an overview of the recent research in this field.
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