Proof of enantioselectivity in a multilayer with a strong exciton polariton coupling and through asymmetric polarization

Abstract: The plasmonic investigation involves activating a multilayer consisting of silver, platinum, silica, and silicon. Hybrid waveguide and surface plasmon polariton modes define the device plasmonic activity. The presence of micrometric features on the multilayer surface facilitates the formation of the waveguide mode. Moreover, they produce a transmitted signal that is associated with localized surface plasmon resonance. A red dye adsorbed onto a multilayer surface causes a strong coupling between excitons and polaritons. This coupling increases the radiation force, and the dye-induced enhancement of radiation force supports the use of passive chirality spectroscopy to measure the optical forces acting on enantiomers. In conclusion, when a Kretschmann scheme is combined with the de-polarization, a built-in asymmetry results in a different optical flux of spectrum photons, resulting in distinct, enantioselective, and solely polarization-dependent spectral contrast, and the enantioselectivity is demonstrated for the D and L penicillamine.