1. Introduction . Chirality, a universal geometric trait in nature, refers to an object that cannot superimpose with its mirror image by simple rotation and translation [ 1 ]. Chiral materials exhibit different responses to the left (LCP) and right (RCP) circularly polarized light in intensity, which is known as circular dichroism (CD) [ 2 ]. Researches based on these properties, known as chiroptics [ 3 ], have wide applications in chiral sensing [ 4 – 6 ], enantiomer separation [...