Enhanced circular dichroism of crossed nanorods with nanowire

被引：7

作者：

Wang, Mingyan ^{[1
]}

Wang, Fei ^{[1
]}

Qu, Yu ^{[1
]}

Wang, Tiankun ^{[1
]}

Chen, Yuyan ^{[1
]}

Bai, Yu ^{[1
]}

Zhang, Zhongyue ^{[1
]}

机构：

[1] Shaanxi Normal Univ, Sch Phys & Informat Technol, Xian 710062, Shaanxi, Peoples R China

来源：

APPLIED OPTICS | 2018年 / 57卷 / 23期

基金：

中国国家自然科学基金;

关键词：

OPTICAL-ACTIVITY; PHOTONIC METAMATERIAL; CHIROPTICAL RESPONSE; PLASMONIC OLIGOMERS; GOLD NANORODS; NANOSTRUCTURES; CHIRALITY; ARRAY;

D O I：

10.1364/AO.57.006721

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Circular dichroism (CD) is a signal that characterizes the optical properties of chiral structures. Structures with intense CD signals have valuable applications in molecular chemistry, pharmaceuticals, and biosensing. This work proposes the use of a nanowire to increase the CD signal of crossed nanorods. The separation of resonant wavelengths of transmission under left-handed and right-handed circular polarization incidence (LCP and RCP) increases because the electric interaction between the upper nanorod and nanowire under LCP incidence is different from that under RCP incidence. The increased separation of resonant wavelengths, in turn, enhances the CD signals. In addition, two new CD modes appear, and these modes can be tuned by changing the structural parameters of the proposed structure. The present results will guide the design of plasmonic chiral nanostructures for enhancing the CD signal. (C) 2018 Optical Society of America

引用

页码：6721 / 6724

页数：4

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