Author(s): S. H. Tao, X.-C. Yuan, J. Lin, and R. E. Burge

Abstract:

“When two vortex beams with unequal topological charges superpose coherently, orbital angular momentum (OAM) in the two beams would not be cancelled out completely in the interference. The residual OAMs contained by the superposed beam are located at different concentric rings and may have opposite orientations owing to the difference of the charges. The residual OAM can be confirmed by the rotation of microparticles when difference between the charges of two interfering beams is large.”

Link to Publications Page

Publication: Optics Express (free download)

Issue/Year/DOI: Optics Express, Vol. 14, Issue 2, pp. 535-541
doi:10.1364/OPEX.14.000535