Abstract

The scalar wave theory of nondiffracting electromagnetic (EM) high-order Bessel vortex beams of fractional type α has been recently explored, and their novel features and promising applications have been revealed. However, complete characterization of the properties for this new type of beam requires a vector analysis to determine the fields’ components in space because scalar wave theory is inadequate to describe such beams, especially when the central spot is comparable to the wavelength (kr/k1, where kr is the radial component of the wavenumber k). Stemming from Maxwell’s vector equations and the Lorenz gauge condition, a full vector wave analysis for the electric and magnetic fields is presented. The results are of particular importance in the study of EM wave scattering of a high-order Bessel vortex beam of fractional type α by particles.

© 2011 Optical Society of America

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