量子电子学报 ›› 2022, Vol. 39 ›› Issue (2): 272-285.doi: 10.3969/j.issn.1007-5461.2022.02.007

• "轨道角动量:从经典光学到量子信息”专辑 II • 上一篇    下一篇

基于光子轨道角动量的手性测量方法

胡海峰, 詹其文∗   

  1. ( 上海理工大学光电信息与计算机工程学院, 上海200093 )
  • 收稿日期:2021-10-29 修回日期:2021-12-16 出版日期:2022-03-28 发布日期:2022-03-28
  • 通讯作者: E-mail: qwzhan@usst.edu.cn E-mail:E-mail: qwzhan@usst.edu.cn
  • 作者简介:胡海峰( 1984 - ), 辽宁辽阳人, 博士, 副教授, 博士生导师, 主要从事光学手性效应及应用方面的研究。E-mail: hfhu@usst.edu.cn 詹其文( 1974 - ), 安徽滁州人, 博士, 教授, 博士生导师, 主要从事光场调控理论与方法, 调控光场与物质相互作用机理及相关应 用技术方面的研究。E-mail: qwzhan@usst.edu.cn
  • 基金资助:
    Supported by Major Research Plan of National Natural Science Foundation of China (国家自然科学基金重大研究计划, 92050202), General Project of National Natural Science Foundation of China (国家自然科学基金面上项目, 62075132), Shanghai Science and Technology Committee (上海市科委地方院校能力建设项目, 19060502500)

Chirality measurements using orbital angular momentum of light

HU Haifeng, ZHAN Qiwen∗   

  1. ( School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China )
  • Received:2021-10-29 Revised:2021-12-16 Published:2022-03-28 Online:2022-03-28

摘要: 传统光学手性测量是基于物质结构对左旋和右旋圆偏振光响应的差异实现的, 而光的圆偏振状态对应 光子自旋角动量(SAM) 状态。光子轨道角动量(OAM) 的发现为光子状态扩展了新的自由度, 在手性测量领域 引入光子OAM 态有助于探索新的物质手性测量方法。从光子SAM、OAM 以及光学手性的基本概念入手, 综 述了近年来国内外基于光子OAM 的手性测量方法。现有的研究结果表明, 通过引入光子OAM 态可以增强传 统圆二色谱的测量。另一方面, 基于光子自旋-轨道耦合效应或光场与分子电四极矩的高阶相互作用, 手性信号 可以通过直接改变光子OAM 量子数的符号进行测量。此外, 高阶光子OAM 态可用于提高尺寸较大的颗粒的 手性响应。最后讨论了光场时空涡旋调控技术的最新进展并展望了其未来在手性测量中的潜在应用。

关键词: 光谱学, 光学测量, 手性, 轨道角动量, 圆二色测量, 光场调控

Abstract: Conventional measurements of optical chirality are based on the response difference of material to the left- and right-handed circularly polarized light. Circularly polarized state of light carries spin angular momentum (SAM) of photons. Orbital angular momentum (OAM) introduces a new degree of freedom of light. For chiral measurement, OAM of photons can be exploited in new methods for the study of the chirality of substances. In this review, starting with the basic concepts of SAM, OAM and optical chirality, the chirality measurement methods based on the OAM of photons in recent years are summarized. These latest developments show that the chiral signal of conventional circular dichroism can be enhanced by the light with OAM. On the other hand, based on the spin-orbit coupling effect and the high order interaction between light field and electric quadrupole of molecules, chiral signals canbe measured by directly switching the sign of OAM of photons. In addition, light with high-order OAM state is helpful to improve the chiral response of particles with size larger than wavelength. Finally, the recent progress on spatiotemporal optical vortex and its potential applications on chiral measurements are also presented.

Key words: spectroscopy, optical measurement, chirality, orbital angular momentum, circular dichroism; light field manipulation

中图分类号: