Sephton, Bereneice CDudley, Angela L2017-11-302017-11-302017-08Sephton, B.C., Dudley, A.L., and Forbes, A. 2017. Radial modes in phase-only twisted light beams. SPIE Proceedings Vol. 10347: Optical Trapping and Optical Micromanipulation XIV: doi: 10.1117/12.22742809781510611511doi: 10.1117/12.2274280https://spie.org/Publications/Proceedings/Paper/10.1117/12.2274280?origin_id=x4325&start_volume_number=10300http://hdl.handle.net/10204/9831Copyright: 2017 SPIE. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's website.Beams carrying orbital angular momentum (OAM) are ubiquitous in many experiments carried out today and cover a wide range of research, from surface microstructure processing to optical tweezers and communications. It follows that these beams are a significant factor in the outcome of these research areas. They are often generated through the use of phase-only modulation with elements such as SLMs and q-plates due to the simplicity of the approach. Interesting consequences result from this generation principal which include the introduction of radial modes as they propagate. We experimentally demonstrate how this effects the distribution of power where a notable decrease in the desired fundamental mode power occurs with higher OAM beams in addition to an expansion in the power across these radial modes. This research additionally affirms their mathematical description as the recently introduced Hypergeometric-Gaussian beams.enVortex beamsOrbital angular momentumGeometric phaseConference PresentationSephton, B. C., & Dudley, A. L. (2017). Radial modes in phase-only twisted light beams. SPIE. http://hdl.handle.net/10204/9831Sephton, Bereneice C, and Angela L Dudley. "Radial modes in phase-only twisted light beams." (2017): http://hdl.handle.net/10204/9831Sephton BC, Dudley AL, Radial modes in phase-only twisted light beams; SPIE; 2017. http://hdl.handle.net/10204/9831 .TY - Conference Presentation AU - Sephton, Bereneice C AU - Dudley, Angela L AB - Beams carrying orbital angular momentum (OAM) are ubiquitous in many experiments carried out today and cover a wide range of research, from surface microstructure processing to optical tweezers and communications. It follows that these beams are a significant factor in the outcome of these research areas. They are often generated through the use of phase-only modulation with elements such as SLMs and q-plates due to the simplicity of the approach. Interesting consequences result from this generation principal which include the introduction of radial modes as they propagate. We experimentally demonstrate how this effects the distribution of power where a notable decrease in the desired fundamental mode power occurs with higher OAM beams in addition to an expansion in the power across these radial modes. This research additionally affirms their mathematical description as the recently introduced Hypergeometric-Gaussian beams. DA - 2017-08 DB - ResearchSpace DP - CSIR KW - Vortex beams KW - Orbital angular momentum KW - Geometric phase LK - https://researchspace.csir.co.za PY - 2017 SM - 9781510611511 T1 - Radial modes in phase-only twisted light beams TI - Radial modes in phase-only twisted light beams UR - http://hdl.handle.net/10204/9831 ER -