Sending femtosecond pulses in circles: highly non-paraxial accelerating beams

Details Sending femtosecond pulses in circles: highly non-paraxial accelerating beams Sending femtosecond pulses in circles: highly non-paraxial accelerating beams

2012-02-15

arxiv.org/abs/1202.3318v1

Physics

Optics

Scientific paper

We use caustic beam shaping on 100 fs pulses to experimentally generate non-paraxial accelerating beams along a 60 degree circular arc, moving laterally by 14 \mum over a 28 \mum propagation length. This is the highest degree of transverse acceleration reported to our knowledge. Using diffraction integral theory and numerical beam propagation simulations, we show that circular acceleration trajectories represent a unique class of non-paraxial diffraction-free beam profile which also preserves the femtosecond temporal structure in the vicinity of the caustic.

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