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General concept of Fano resonance is considered so that to show thepossibility of this resonance in space. Using a recently found solution for aBessel wave beam impinging a dielectric sphere, we analyze the electromagneticfields near a microsphere with different optical size and permittivity values.We theoretically reveal a spatial Fano resonance when a resonant mode of thesphere interferes with {an amount of } non-resonant modes. This resonanceresults in a giant jump of the electric field behind the sphere impinged by thefirst-order Bessel beam. The local minimum of the electromagnetic field turnsout to be noticeably distanced from the rear edge of the microsphere. However,this is a near-field effect and we prove it. We also show that this effect canbe utilized for engineering a submicron optical trap with unusual and usefulproperties.

Spatial Fano resonance of a dielectric microsphere impinged by a Bessel beam