论文标题
朝向手性极化
Towards chiral polaritons
论文作者
论文摘要
光和材料激发之间的耦合是多种光学现象的基础。极性子是具有杂交波函数的耦合系统的本征状态。由于它们的混合组成,Polaritons在同一时间表现出了光子和电子激发的典型特性,因此提供了控制电子传输甚至化学动力学的新方法。虽然大多数理论和实验性工作都集中在光与物质之间的电偶极耦合的极化子上,而在手性量子发射器中,电子过渡的特征是同时呈非零的电和磁性偶极矩。几何性手性以深刻的方式影响材料的光学特性,并使我们能够区分手性分子的对映异构体的能力构成了现象。因此,很自然地想知道在强烈的耦合的领域中可能会导致哪种新型效果手性。目前,该领域位于纳米光子学,量子光学和化学的交集处。从这个角度来看,我们对手性极化者提供了看法。我们回顾了物质和电磁场的基本物理概念,讨论需要解决的主要理论和实验挑战,并考虑通过手性光和物质之间的强耦合可以实现的新型效果。
Coupling between light and material excitations underlies a wide range of optical phenomena. Polaritons are eigenstates of a coupled system with hybridized wave function. Owing to their hybrid composition, polaritons exhibit at the same time properties typical for photonic and electronic excitations, thus offering new ways for controlling electronic transport and even chemical kinetics. While most theoretical and experimental efforts have been focused on polaritons with electric-dipole coupling between light and matter, in chiral quantum emitters, electronic transitions are characterized by simultaneously nonzero electric and magnetic dipole moments. Geometrical chirality affects the optical properties of materials in a profound way and enables phenomena that underlie our ability to discriminate enantiomers of chiral molecules. Thus, it is natural to wonder what kinds of novel effects chirality may enable in the realm of strong light-matter coupling. Right now, this field located at the intersection of nanophotonics, quantum optics, and chemistry is in its infancy. In this Perspective, we offer our view towards chiral polaritons. We review basic physical concepts underlying chirality of matter and electromagnetic field, discuss the main theoretical and experimental challenges that need to be solved, and consider novel effects that could be enabled by strong coupling between chiral light and matter.