Abstract

We achieve controllable noninterferometric rotation of a bored helical beam by introducing a phase shift exclusively to the annular helical region of the phase. We present a derivation based on the decomposition of the beams, which shows that a constant phase shift of ΔΦ between the bore and the surrounding helical phase with topological charge ℓ will rotate the intensity profile by ΔΦ/ about its center. The effect of the phase shifting is verified with experiments. This technique is simple, while it preserves the transverse intensity profiles of the beams. Our report may find applications in optical manipulation and trapping.

© 2010 Optical Society of America

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