Enantioselective switch on responses of dissipative chiral molecules

Enantiodetection is an important and challenging task across natural sciences. The cyclic three-level models of chiral molecules provided possibilities to obtain the ultimate limit of the enantioselectivities in purely electric dipole effects, yielding an emerging frontier in enantiodetection. However, the generated enantioselectivities were usually severely reduced in the strong decoherence region, failing most of the related chiroptical methods. Here, we propose enantioselective switches of molecular responses by well designing the electromagnetic fields based on the dissipative cyclic three-level model of chiral molecules and provide a chiroptical method of enantiodetection. In our switches, the steady-state responses are turned on for the selected enantiomer and simultaneously turned off for its mirror image, which corresponds to the ultimate limit of enantioselectivities. The switches can survive in the strong decoherence regions, and so does the suggested chiroptical method of enantiodetection. Our results give more insight into answering whether the enantioselective responses of light based on the cyclic three-level model can survive in the strong decoherence region and thus have a potential impact on further research.