对映体药物
电介质
材料科学
电场
功勋
圆二色性
光电子学
光学
手性(物理)
分子物理学
物理
对映选择合成
化学
结晶学
有机化学
催化作用
手征对称破缺
量子力学
夸克
Nambu–Jona Lasinio模型
作者
Michelle Solomon,Jack Hu,Mark Lawrence,Aitzol García‐Etxarri,Jennifer A. Dionne
出处
期刊:ACS Photonics
[American Chemical Society]
日期:2018-12-26
卷期号:6 (1): 43-49
被引量:157
标识
DOI:10.1021/acsphotonics.8b01365
摘要
Circularly polarized light (CPL) exhibits an enantioselective interaction with chiral molecules, providing a pathway toward all-optical chiral resolution. High index dielectric nanoparticles have been shown to enhance this relationship, but with a spatially varying sign (or enantiospecificity) that yields a near zero spatially averaged enhancement. Using full field electromagnetic simulations, we design metasurfaces consisting of high index dielectric disks that provide large-volume, uniform-sign enhancements in both the optical density of chirality, C (the figure of merit for sensing and spectroscopy), and Kuhn’s dissymmetry factor, g (the figure of merit for separation). By varying disk radius, we achieve local enhancements in C and g up to 138-fold and 15-fold, respectively, as well as volumetric enhancements of 30-fold and 4.2-fold. The uniform-sign enhancements in C occur near the first Kerker condition, where overlapping electric and magnetic modes maximize field strength and preserve the π/2 phase lag between the electric and magnetic fields of CPL; in contrast, uniform-sign enhancements in g occur with spectrally separated modes, where fields and phase remain optimal without reduced molecular absorption. Using first-order kinetics of the molecule thiocamphor, we show how this optically enantiopure metasurface could enable 20% enantiomeric excesses with a >2000-fold increase in yield for a photoionization reaction compared to CPL alone.
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