The group led by Professor Kohei Imura (Waseda University) visualized chiral optical field around a gold nanoplate using a scanning near-field optical microscope and revealed that their spatial characters are closely related to plasmonic standing waves excited in the nanoplate. Chiral and optical field exhibit different three-dimensional characteristics, and their physical origins are revealed by theoretical calculations. These findings provide detailed insight into the plasmon-enhanced chiral field and a fundamental basis for the highly sensitive detection of chiral molecules.
The work has been published online in Nano Letters on December 20, 2024.

https://pubs.acs.org/doi/10.1021/acs.nanolett.4c05151