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4 papers · 2 filters
Generation of a spin-polarized electron beam by multipoles magnetic fields
Ebrahim Karimi, Vincenzo Grillo, Robert W. Boyd +1
The propagation of an electron beam in the presence of transverse magnetic fields possessing integer topological charges is presented. The spin--magnetic interaction introduces a n…
Influence of generalized focusing of few-cycle Gaussian pulses in attosecond pulse generation
Ebrahim Karimi, Carlo Altucci, Valer Tosa +2
In contrast to the case of quasi-monochromatic waves, a focused optical pulse in the few-cycle limit may exhibit two independent curved wavefronts, associated with phase and group…
Integrated multi vector vortex beam generator
Sebastian A. Schulz, Taras Machula, Ebrahim Karimi +1
A novel method to generate and manipulate vector vortex beams in an integrated, ring resonator based geometry is proposed. We show numerically that a ring resonator, with an approp…
Reconstructing the Poynting vector skew angle and wave-front of optical vortex beams via two-channel moiré deflectometery
Mohammad Yeganeh, Saifollah Rasouli, Mohsen Dashti +3
A novel approach based on the two-channel moiré deflectometry has been used to measure both wave-front and transverse component of the Poynting vector of an optical vortex beam. Ge…