We demonstrate how to create non-diffracting vector Bessel beams by implementing a spatial light modulator (SLM) to generate scalar Bessel beams which are then converted into vector fields by the use of an azimuthally-varying birefringent plate, known as a q-plate. The orbital angular momentum (OAM) of these generated beams is measured by performing a modal decomposition on each of the beam’s polarization components. This is achieved by separating the circular polarization components through a polarization grating (PG) before performing the modal decomposition. We investigate both single charged Bessel beams as well as superpositions and the results are in good agreement with theory.
Reference:
Dudley, A, Lib, Y, Mhlanga, T, Escuti, M and Forbes, A. 2014. Generating and measuring non-diffracting vector Bessel beams. In: Proceedings of SPIE Vol. 8999, 89990K, Complex Light and Optical Forces VIII, San Francisco, California, United States, 4-6 February 2014
Dudley, A. L., Lib, Y., Mhlanga, T., Escuti, M., & Forbes, A. (2014). Generating and measuring non-diffracting vector Bessel beams. SPIE Proceedings. http://hdl.handle.net/10204/7563
Dudley, Angela L, Y Lib, T Mhlanga, M Escuti, and A Forbes. "Generating and measuring non-diffracting vector Bessel beams." (2014): http://hdl.handle.net/10204/7563
Dudley AL, Lib Y, Mhlanga T, Escuti M, Forbes A, Generating and measuring non-diffracting vector Bessel beams; SPIE Proceedings; 2014. http://hdl.handle.net/10204/7563 .
