2021
DOI: 10.1364/josab.424927
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Spatial Fano resonance of a dielectric microsphere impinged on by a Bessel beam

Abstract: The general concept of Fano resonance is considered so as to show the possibility of this resonance in space. Using a recently found solution for a Bessel wave beam impinging on a dielectric sphere, we analyze the electromagnetic fields near a microsphere with different optical sizes and permittivity values. We theoretically reveal spatial Fano resonance when a resonant mode of the sphere interferes with an amount of non-resonant modes. This resonance results in a giant jump of the electric field behind the sp… Show more

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Cited by 10 publications
(9 citation statements)
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“…The overall electric and magnetic eld distribution demonstrates a spatial Fano resonance. Our numerical study aligns with the analytical solution for the near-eld Bessel beam excitation of spherical nanoparticles presented in ref 51,48 . From Fig.…”
Section: Fano Resonance At Fr1supporting
confidence: 86%
“…The overall electric and magnetic eld distribution demonstrates a spatial Fano resonance. Our numerical study aligns with the analytical solution for the near-eld Bessel beam excitation of spherical nanoparticles presented in ref 51,48 . From Fig.…”
Section: Fano Resonance At Fr1supporting
confidence: 86%
“…In other words this pattern corresponds to the transverse magnetic mode TM 52,0,1 , where l = 52 is orbital, m = 0 is azimuthal and p = 1 is the radial mode numbers, respectively. [60,61] The spatial field configuration inside a sphere under SR conditions, which are clear seen from Figure 2, are similar to the spatial field configuration inside a sphere with other Mie size parameter and refractive index. [29,30,[38][39][40] Notable, only 2 maxima at the poles of a homogeneous sphere has magnitude ≈4-5 order higher than others.…”
Section: Resultssupporting
confidence: 64%
“…In other words this pattern corresponds to the transverse magnetic mode TM 52,0,1 , where l = 52 is orbital, m = 0 is azimuthal and p = 1 is the radial mode numbers, respectively. [ 60,61 ]…”
Section: Resultsmentioning
confidence: 99%
“…A detailed classification of the singularities is presented by Novitsky and Barkovsky [8]. Then, the study has been shifted to complicated configurations, such as, e.g., those in a nondiffractive tractor beam [13], Bessel beam [14], etc. However, as a rule, the developed approaches do not differ from those for an abstract vector field.…”
Section: Introductionmentioning
confidence: 99%