Physics – Optics
Scientific paper
2009-09-15
Phys. Rev. A 81, 053813 (2010)
Physics
Optics
5 pages and 5 figures
Scientific paper
10.1103/PhysRevA.81.053813
We present an easy, efficient and fast method to generate arbitrary linear combinations of light orbital angular momentum eigenstates $\ell=\pm 2$ starting from a linearly polarized TEM$_{00}$ laser beam. The method exploits the spin-to-orbital angular momentum conversion capability of a liquid-crystal-based $q$-plate and a Dove prism inserted in a Sagnac polarizing interferometer. The nominal generation efficiency is 100\%, being limited only by reflection and scattering losses in the optical components. When closed paths are followed on the polarization Poincar\'{e} sphere of the input beam, the associated Pancharatnam geometric phase is transferred unchanged to the orbital angular momentum state of the output beam.
Karimi Ebrahim
Marrucci Lorenzo
Piccirillo Bruno
Santamato Enrico
Slussarenko Sergei
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