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11 June 2024 Electric and magnetic multipole centers
Alex Kildishev, Karim Achouri, Daria Smirnova
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Proceedings Volume PC12991, Nanophotonics X; PC129910D (2024) https://doi.org/10.1117/12.3015671
Event: SPIE Photonics Europe, 2024, Strasbourg, France
Abstract
Multipole expansions enable rapid numerical modeling of optical scatterer arrays, but choosing expansion centers is ambiguous. We derive optimal centers where multipolar spectra become unique, separately minimizing electric and magnetic quadrupole norms. This significantly reduces computations, benefiting differentiable solvers critical for machine learning photonics design. Analysis of dispersive mutual center positions provides insight into scattering and optical forces. Connections to optomechanics, and quantum/topological photonics are also hinted through links between the number of optimal magnetic centers and the topological metrics of resonant modes.
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Alex Kildishev, Karim Achouri, and Daria Smirnova "Electric and magnetic multipole centers", Proc. SPIE PC12991, Nanophotonics X, PC129910D (11 June 2024); https://doi.org/10.1117/12.3015671
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KEYWORDS
Magnetism
Quantum photonics
Scattering
Optoelectronics
Optomechanical design
Quantum emitters
Quantum machine learning
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