期刊
NANO LETTERS
卷 14, 期 5, 页码 2783-2788出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl500340n
关键词
Scattering dark states; nanostructures; light scattering; coupled-resonator-induced transparency; Fano resonances; temporal coupled-mode theory
类别
资金
- Army Research Office through the Institute for Soldier Nanotechnologies [W911NF-13-D-0001]
- Materials Research Science and Engineering Centers of the National Science Foundation [DMR-0819762]
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.
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