In this paper, an optical method for precisely estimating constituents of optical isomers (OIs) in mixed solution is presented. We convert the composition ratio of OI into polarization-rotation-dependent spin Hall effect of light (SHEL). The theoretical model between the SHEL and OI composition ratio is established in the geometrical-optics picture, and the spatial shift can be measured through weak measurement technique. Based on our theory, the concentrations of glucose and fructose in a mixed solution are separately obtained. Our accurate measurements of the chiral enantiomer composition can provide an avenue for chiral drug synthesis and analysis.

摘要 21世纪以来, 阿秒(attosecond, 1 as=10-18 s)技术从诞生逐渐走向快速发展, 为我们带来了前所未有的时间分 辨(time-resolved)探测能力. 以往飞秒(1 fs=10-15 s)泵浦-探测(pump-probe)超快光谱技术被广泛应用于材料的超快 动力学研究, 其脉宽和光子能量可以很好地研究由外层电子决定的材料物性. 阿秒技术的出现使我们有可能研究 更快的物理过程以及由内层电子决定的物性. 本文介绍阿秒瞬态吸收谱(attosecond transient absorption spectroscopy)、阿秒时间分辨角分辨光电子能谱(attosecond time-resolved angular-resolved photoelectron spectroscopy)和 中红外超快光谱(mid-infrared ultrafast spectroscopy)等三种超快泵浦-探测技术及其在材料领域的典型应用实例, 并 © 2020《中国科学》杂志社 www.scichina.com csb.scichina.com