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Kerker Effect, Superscattering, and Scattering Dark State in Atomic Antennas

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Alaee Khanghah,  Rasoul
Sandoghdar Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Sandoghdar,  Vahid
Sandoghdar Division, Max Planck Institute for the Science of Light, Max Planck Society;
Max-Planck-Zentrum für Physik und Medizin, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Alaee Khanghah, R., Safari, A., Sandoghdar, V., & Boyd, R. W. (2020). Kerker Effect, Superscattering, and Scattering Dark State in Atomic Antennas. Physical Review Research, to appear; arXiv:2008.03574.


Cite as: http://hdl.handle.net/21.11116/0000-0006-EA07-B
Abstract
We study scattering phenomena such as the Kerker effect, superscattering, and scattering dark states in a subwavelength atomic antenna consisting of atoms with only electric dipole transitions. We show that an atomic antenna can exhibit arbitrarily large or small scattering cross sections depending on the geometry of the structure and the direction of the impinging light. We also demonstrate that atoms with only an electric dipole transition can exhibit a directional radiation pattern with zero backscattering when placed in a certain configuration. This is a special case of a phenomenon known as the Kerker effect, which typically occurs in the presence of both electric and magnetic transitions. Our findings open a pathway to design highly directional emitters, nonradiating sources, and highly scattering objects based on individually controlled atoms.