用于增强手性分子传感的非手性、螺旋度保持且共振的结构
光学
2020-02-25 v2
摘要
我们推导了一组设计条件,这些条件可导出适用于分子圆二色性(CD)增强的结构。结构的非手性以及两束适当选取的、依次入射的相反螺旋度光束,确保 CD 信号仅取决于分子的手性吸收特性,而不取决于其非手性吸收特性。在此条件下,防止两种偏振手性相互耦合的螺旋度保持结构,在给定结构增强场的能力下使 CD 信号增强最大化。当满足非手性与螺旋度保持要求时,CD 信号的增强与场的增强直接相关。接着,我们按照这些要求设计了一个示例结构。所考虑的系统是硅圆柱平面阵列,在法向入射平面波照明下工作。全波数值计算表明,对于介于圆柱高度 1.25 至 3 倍的相互作用长度,透射 CD 信号的增强在 6.5 到 3.75 之间。
引用
@article{arxiv.1810.08385,
title = {Achiral, Helicity Preserving, and Resonant Structures for Enhanced Sensing of Chiral Molecules},
author = {Florian Graf and Joshua Feis and Xavier Garcia-Santiago and Martin Wegener and Carsten Rockstuhl and Ivan Fernandez-Corbaton},
journal= {arXiv preprint arXiv:1810.08385},
year = {2020}
}
备注
This document is the unedited Authors version of a Submitted Work that was subsequently accepted for publication in ACS Photonics, copyright American Chemical Society after peer review. To access the final edited and published work see 10.1021/acsphotonics.8b01454. The corrections published in 10.1021/acsphotonics.0c00113 are included in this arxiv document