Navarro-Barón Erik P, Vinck-Posada Herbert, González-Tudela Alejandro
Grupo de Superconductividad y Nanotecnología, Departamento de Física, Universidad Nacional de Colombia, Bogota, Bogotá D.C., Colombia.
Institute of Fundamental Physics (IFF), Consejo Superior de Investigaciones Cientificas (CSIC), Madrid, Spain.
Nanophotonics. 2024 Feb 26;13(11):1963-1973. doi: 10.1515/nanoph-2023-0843. eCollection 2024 May.
Spontaneous emission is one of the most fundamental out-of-equilibrium processes in which an excited quantum emitter relaxes to the ground state due to quantum fluctuations. In this process, a photon is emitted that can interact with other nearby emitters and establish quantum correlations between them, e.g., via super and subradiance effects. One way to modify these photon-mediated interactions is to alter the dipole radiation patterns of the emitter, e.g., by placing photonic crystals near them. One recent example is the generation of strong directional emission patterns - key to enhancing super and subradiance effects - in two dimensions by employing photonic crystals with band structures characterized by linear isofrequency contours and saddle points. However, these studies have predominantly used oversimplified toy models, overlooking the electromagnetic field's intricacies in actual materials, including aspects like geometrical dependencies, emitter positions, and polarization. Our study delves into the interaction between these directional emission patterns and the variables mentioned above, revealing the untapped potential to fine-tune collective quantum optical phenomena.
自发辐射是最基本的非平衡过程之一，在此过程中，一个受激量子发射体由于量子涨落而弛豫到基态。在这个过程中，会发射出一个光子，该光子可以与其他附近的发射体相互作用，并在它们之间建立量子关联，例如通过超辐射和亚辐射效应。修改这些光子介导相互作用的一种方法是改变发射体的偶极辐射模式，例如通过在它们附近放置光子晶体。最近的一个例子是通过使用具有以线性等频率轮廓和鞍点为特征的能带结构的光子晶体，在二维中产生强定向发射模式——这是增强超辐射和亚辐射效应的关键。然而，这些研究主要使用了过于简化的玩具模型，忽略了实际材料中电磁场的复杂性，包括几何依赖性、发射体位置和极化等方面。我们的研究深入探讨了这些定向发射模式与上述变量之间的相互作用，揭示了微调集体量子光学现象的未开发潜力。
