Department of Physics, University of Gothenburg, SE-412 96 Gothenburg, Sweden.
Department of Physics, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden.
Phys Rev Lett. 2023 Jan 27;130(4):043804. doi: 10.1103/PhysRevLett.130.043804.
When light scatters off a sphere, it produces a rich Mie spectrum full of overlapping resonances. Single resonances can be explained with a quantum analogy and result in Fano profiles. However, the full spectrum is so complex that recognizable patterns have not been found, and is only understood by comparing to numerical simulations. Here we show the directional Mie spectrum of evaporating water droplets arranged in consecutive Fano Combs. We then fully explain it by expanding the quantum analogy. This turns the droplet into an "optical atom" with angular momentum, tunneling, and excited states.
当光从一个球体上散射时，会产生一个丰富的 Mie 光谱，其中充满了重叠的共振。单个共振可以用量子类比来解释，从而产生 Fano 轮廓。然而，整个光谱非常复杂，以至于没有发现可识别的模式，只能通过与数值模拟进行比较来理解。在这里，我们展示了排列成连续 Fano 梳状的蒸发水滴的定向 Mie 光谱。然后，我们通过扩展量子类比来充分解释它。这使得液滴变成了一个具有角动量、隧道和激发态的“光学原子”。
