Strong coupling induced ultrasensitive chiral detection by metal-dielectric hybrid metasurface

被引：0

作者：

Jia, Tianxu ^{[1
]}

Li, Bingjue ^{[2
,3
]}

Gu, Bing ^{[1
]}

Zhan, Qiwen ^{[4
,5
]}

Rui, Guanghao ^{[1
]}

机构：

[1] Southeast Univ, Sch Elect Sci & Engn, Dept Opt Engn, Nanjing 211189, Jiangsu, Peoples R China

[2] Southeast Univ, Sch Mech Engn, Nanjing 211189, Peoples R China

[3] Southeast Univ, Jiangsu Key Lab Design & Manufacture Micronano Bio, Nanjing 211189, Peoples R China

[4] Univ Shanghai Sci & Technol, Sch Opt Elect & Comp Engn, Shanghai 200093, Peoples R China

[5] Zhangjiang Lab, 100 Haike Rd, Shanghai 201204, Peoples R China

来源：

OPTICS AND LASER TECHNOLOGY | 2025年 / 181卷

关键词：

Circular dichroism; Superchirality; Strong coupling; Hybrid metasurface; CIRCULAR-DICHROISM; FIELDS; RESONANCE;

D O I：

10.1016/j.optlastec.2024.111995

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Circular dichroism (CD) spectroscopy struggles to detect weak signals from small, chiral molecules due to limitations in light absorption. This study introduces a method for significantly enhancing CD signals using a metaldielectric hybrid metasurface. The metasurface creates a superchiral hotspot that amplifies the chirality of nearby molecules. Two techniques are proposed to overcome signal cancellation between the intrinsic and induced signals to achieve an overall enhancement of the CD signal by up to 23,630 times. This approach has the potential for ultrasensitive detection of chiral molecules at the nanoscale, with applications in pharmacology, toxicology, and life sciences.

引用

页数：11

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