[15a-2G-1~11] 3.12 Nanoscale optical science and near-field optics

△ [15a-2G-9] Ultrasensitive Detection of Chiral Supramolecules Based on Highly Twisted Optical Fields Created by Achiral Plasmonic Nanostructures

〇(D)Shun Hashiyada¹, Affar Karimullah², Hiromi Okamoto¹, Malcolm Kadodwala² (1.SOKENDAI and Inst. for Mol. Sci., 2.Univ. of Glasgow)

Keywords:Chirality,Optical Acticity,Plasmon

Chiral plasmonic nanostructures yield enhanced detection sensitivity of chiral molecules in the vicinity the nanostructures by several orders of magnitude, which is caused by the highly twisted optical fields generated by the nanostructures. In this study, we demonstrate that the use of non-chiral rectangular gold nanostructures and a linearly polarized incident light can create strongly twisted optical fields, which makes highly sensitive detection of supramolecule cowpea mosaic viruses possible.