中国物理B ›› 2021, Vol. 30 ›› Issue (11): 113303-113303.doi: 10.1088/1674-1056/ac11df

所属专题: SPECIAL TOPIC — Optical field manipulation

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Superchiral fields generated by nanostructures and their applications for chiral sensing

Huizhen Zhang(张慧珍), Weixuan Zhang(张蔚暄), Saisai Hou(侯赛赛), Rongyao Wang(王荣瑶), and Xiangdong Zhang(张向东)   

  1. Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements of Ministry of Education, Beijing Key Laboratory of Nanophotonics & Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology, Beijing 100081, China
  • 收稿日期:2021-04-18 修回日期:2021-06-29 接受日期:2021-07-07 出版日期:2021-10-13 发布日期:2021-11-03
  • 通讯作者: Xiangdong Zhang E-mail:zhangxd@bit.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 91850205 and 11904021).

Superchiral fields generated by nanostructures and their applications for chiral sensing

Huizhen Zhang(张慧珍), Weixuan Zhang(张蔚暄), Saisai Hou(侯赛赛), Rongyao Wang(王荣瑶), and Xiangdong Zhang(张向东)   

  1. Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements of Ministry of Education, Beijing Key Laboratory of Nanophotonics & Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology, Beijing 100081, China
  • Received:2021-04-18 Revised:2021-06-29 Accepted:2021-07-07 Online:2021-10-13 Published:2021-11-03
  • Contact: Xiangdong Zhang E-mail:zhangxd@bit.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 91850205 and 11904021).

摘要: Chirality is ubiquitous in natural world. Although with similar physical and chemical properties, chiral enantiomers could play different roles in biochemical processes. Discrimination of chiral enantiomers is extremely important in biochemical, analytical chemistry, and pharmaceutical industries. Conventional chiroptical spectroscopic methods are disadvantageous at a limited detection sensitivity because of the weak signals of natural chiral molecules. Recently, superchiral fields were proposed to effectively enhance the interaction between light and molecules, allowing for ultrasensitive chiral detection. Intensive theoretical and experimental works have been devoted to generation of superchiral fields based on artificial nanostructures and their application in ultrasensitive chiral sensing. In this review, we present a survey on these works. We begin with the introduction of chiral properties of electromagnetic fields. Then, the optical chirality enhancement and ultrasensitive chiral detection based on chiral and achiral nanostructures are discussed respectively. Finally, we give a short summary and a perspective for the future ultrasensitive chiral sensing.

关键词: superchiral fields, chiral detection, chiral nanostructures, achiral nanostructures

Abstract: Chirality is ubiquitous in natural world. Although with similar physical and chemical properties, chiral enantiomers could play different roles in biochemical processes. Discrimination of chiral enantiomers is extremely important in biochemical, analytical chemistry, and pharmaceutical industries. Conventional chiroptical spectroscopic methods are disadvantageous at a limited detection sensitivity because of the weak signals of natural chiral molecules. Recently, superchiral fields were proposed to effectively enhance the interaction between light and molecules, allowing for ultrasensitive chiral detection. Intensive theoretical and experimental works have been devoted to generation of superchiral fields based on artificial nanostructures and their application in ultrasensitive chiral sensing. In this review, we present a survey on these works. We begin with the introduction of chiral properties of electromagnetic fields. Then, the optical chirality enhancement and ultrasensitive chiral detection based on chiral and achiral nanostructures are discussed respectively. Finally, we give a short summary and a perspective for the future ultrasensitive chiral sensing.

Key words: superchiral fields, chiral detection, chiral nanostructures, achiral nanostructures

中图分类号:  (Optical activity and dichroism)

  • 33.55.+b
73.20.Mf (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)) 81.05.Xj (Metamaterials for chiral, bianisotropic and other complex media) 78.67.Bf (Nanocrystals, nanoparticles, and nanoclusters)