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Towards chiral polaritons

Denis G. BaranovChristian Sch\"aferMaxim V. Gorkunov
Dec 2022
摘要
Coupling between light and material excitations underlies a wide range ofoptical phenomena. Polaritons are eigenstates of a coupled system withhybridized wave function. Owing to their hybrid composition, polaritons exhibitat the same time properties typical for photonic and electronic excitations,thus offering new ways for controlling electronic transport and even chemicalkinetics. While most theoretical and experimental efforts have been focused onpolaritons with electric-dipole coupling between light and matter, in chiralquantum emitters, electronic transitions are characterized by simultaneouslynonzero electric and magnetic dipole moments. Geometrical chirality affects theoptical properties of materials in a profound way and enables phenomena thatunderlie our ability to discriminate enantiomers of chiral molecules. Thus, itis natural to wonder what kinds of novel effects chirality may enable in therealm of strong light-matter coupling. Right now, this field located at theintersection of nanophotonics, quantum optics, and chemistry is in its infancy.In this Perspective, we offer our view towards chiral polaritons. We reviewbasic physical concepts underlying chirality of matter and electromagneticfield, discuss the main theoretical and experimental challenges that need to besolved, and consider novel effects that could be enabled by strong couplingbetween chiral light and matter.
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