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Updated: Mar 28, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Plasmon-induced strong interaction between chiral molecules and orbital angular momentum of light
Tong Wu1, Rongyao Wang1, Xiangdong Zhang1
1School of Physics and Beijing Key Laboratory of Nanophotonics &Ultrafine Optoelectronic Systems, Beijing Institute of Technology, 100081, Beijing, China.
Abstract:
Whether or not chiral interaction exists between the optical orbital angular momentum (OAM) and a chiral molecule remains unanswered. So far, such an interaction has not been observed experimentally. Here we present a T-matrix method to study the interaction between optical OAM and the chiral molecule in a cluster of nanoparticles. We find that strong interaction between the chiral molecule and OAM can be induced by the excitation of plasmon resonances. An experimental scheme to observe such an interaction has been proposed. Furthermore, we have found that the signal of the OAM dichroism can be either positive or negative, depending on the spatial positions of nanocomposites in the cross-sections of OAM beams. The cancellation between positive and negative signals in the spatial average can explain why the interaction has not been observed in former experiments.
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