Preprint article ยท Journal article
Direct Amplitude-Phase Near-Field Observation of Higher-Order Anapole States
Anapole states associated with the resonant suppression of electric-dipole scattering exhibit minimized extinction and maximized storage of electromagnetic energy inside a particle. Using numerical simulations, optical extinction spectroscopy, and amplitude-phase near-field mapping of silicon dielectric disks, we demonstrate high-order anapole states in the near-infrared wavelength range (900-1700 nm).
We develop the procedure for unambiguously identifying anapole states by monitoring the normal component of the electric near-field and experimentally detect the first two anapole states as verified by far-field extinction spectroscopy and confirmed with the numerical simulations. We demonstrate that higher-order anapole states possess stronger energy concentration and narrower resonances, a remarkable feature that is advantageous for their applications in metasurfaces and nanophotonics components, such as nonlinear higher-harmonic generators and nanoscale lasers.
Language: | English |
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Publisher: | American Chemical Society (ACS) |
Year: | 2017 |
Pages: | 7152-7159 |
ISSN: | 15306992 and 15306984 |
Types: | Preprint article and Journal article |
DOI: | 10.1021/acs.nanolett.7b04200 |
ORCIDs: | 0000-0001-5512-8288 , 0000-0001-9943-3946 , Malureanu, Radu , Lavrinenko, Andrei and 0000-0002-0393-4859 |