Vortex beam generation and other advanced optics experiments reproduced with a twisted-nematic liquid-crystal display with limited phase modulation

EUROPEAN JOURNAL OF PHYSICS

dc.creatorCofré-Henríquez, Aarón Moisés
dc.creatorGarcia-Martinez, Pascuala
dc.creatorVargas-Vasquez, Asticio Junio Alejandro
dc.creatorMoreno, Ignacio
dc.date2021-08-23T22:56:01Z
dc.date2022-07-07T02:34:52Z
dc.date2021-08-23T22:56:01Z
dc.date2022-07-07T02:34:52Z
dc.date2017
dc.date.accessioned2023-08-22T00:02:52Z
dc.date.available2023-08-22T00:02:52Z
dc.identifier1151290
dc.identifier1151290
dc.identifierhttps://hdl.handle.net/10533/251765
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8298568
dc.descriptionIn this work we propose the use of twisted-nematic liquid-crystal spatial light modulators (TN-LC-SLM) as a useful tool for training students in the manipulation of light beams with phase-only masks. In particular, we focus the work on the realization of phase-only gratings and phase-only spiral phases for the generation of vortex beams, beams carrying orbital angular momentum (OAM). Despite the extensive activity in this field, its experimental implementation for educational purposes is limited because it requires the use of very expensive high-resolution liquid-crystal on silicon (LCOS) SLMs. Here, we show that a low-cost experimental implementation can be done with older TNLC technology. However, these devices, intended for display applications, exhibit rather limited optical phase modulation properties in comparison with modern LCOS devices, such as a very low range of phase modulation and a general coupled intensity modulation. However, we show that a precise characterization of their retardance parameters permits their operation in useful modulation configurations. As examples, we include one continuous phaseonly configuration useful for reproducing the optimal triplicator phase grating, and a binary p-phase modulation. We include experiments with the realization of different phase diffraction gratings, and their combination with spiral phase patterns and lens functions to generate a variety of vortex beams.
dc.descriptionRegular 2015
dc.descriptionFONDECYT
dc.descriptionFONDECYT
dc.languageeng
dc.relationhandle/10533/111557
dc.relationhandle/10533/111541
dc.relationhandle/10533/108045
dc.relationhttps://doi.org/10.1088/1361-6404/38/1/014005
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 Chile
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/
dc.rightsinfo:eu-repo/semantics/article
dc.rightsinfo:eu-repo/semantics/openAccess
dc.titleVortex beam generation and other advanced optics experiments reproduced with a twisted-nematic liquid-crystal display with limited phase modulation
dc.titleEUROPEAN JOURNAL OF PHYSICS
dc.typeArticulo
dc.typeinfo:eu-repo/semantics/publishedVersion


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