Theoretical Criteria for Scattering Dark States in Nanostructured Particles
Author(s)Hsu, Chia Wei; DeLacy, Brendan G.; Johnson, Steven G.; Joannopoulos, John D.; Soljacic, Marin
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Nanostructures with multiple resonances can exhibit a suppressed or even completely eliminated scattering of light, called a scattering dark state. We describe this phenomenon with a general treatment of light scattering from a multiresonant nanostructure that is spherical or nonspherical but subwavelength in size. With multiple resonances in the same channel (i.e., same angular momentum and polarization), coherent interference always leads to scattering dark states in the low-absorption limit, regardless of the system details. The coupling between resonances is inevitable and can be interpreted as arising from far-field or near-field. This is a realization of coupled-resonator-induced transparency in the context of light scattering, which is related to but different from Fano resonances. Explicit examples are given to illustrate these concepts.
DepartmentMassachusetts Institute of Technology. Institute for Soldier Nanotechnologies; Massachusetts Institute of Technology. Department of Mathematics; Massachusetts Institute of Technology. Department of Physics
American Chemical Society (ACS)
Hsu, Chia Wei, Brendan G. DeLacy, Steven G. Johnson, John D. Joannopoulos, and Marin Soljacic. “Theoretical Criteria for Scattering Dark States in Nanostructured Particles.” Nano Lett. 14, no. 5 (May 14, 2014): 2783–2788.