Fig. 4: Gap-based chirality sensing.
From: Perspectives of chiral nanophotonics: from mechanisms to biomedical applications
a (left-top-left) CD spectra of nano crescent array with a gap size of 5 nm. (left-top-center, right) SEM image of nano crescent with the nanogap size of 2.5 nm and 5 nm. (left-middle, bottom) Calculated absorption difference and electric distribution of nano crescent with the nanogap size of 2.5 nm and 5 nm. (right) Experimental results of Raman spectrum. Adapted with permission from ref. 97 b Circular differential scattering enhancement versus light mode volume (left), the optical response of gold nanoparticles on the mirror system (middle), circular differential scattering spectrum of the racemate (right-top), and probability of enantiomeric excess (right-bottom). Reproduced under the terms of the Creative Commons CC By License from ref. 64. Copyright 2024 The Author(s). Published by Springer Nature.
