Fano Combs in the Directional Mie Scattering of a Water Droplet
Javier Tello Marmolejo1, Adriana Canales2, Dag Hanstorp1
1Department of Physics, University of Gothenburg, SE-412 96 Gothenburg, Sweden.
Abstract:
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.
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