Vortex beams with tunable "all-with-visible-light" dye-doped liquid crystal q-plates for broadband application
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2026
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| author | Moya, Adrián Sánchez-Montes, Adriana R. Gallego, Sergi Calzado, Eva M. Márquez, Andrés Pascual, Inmaculada Beléndez, Augusto |
| author_facet | Moya, Adrián Sánchez-Montes, Adriana R. Gallego, Sergi Calzado, Eva M. Márquez, Andrés Pascual, Inmaculada Beléndez, Augusto |
| contents | The photoalignment technique for liquid crystal (LC) device fabrication, despite being a well-established method, remains of significant relevance because of its broad applicability. Among its applications, one of particular interest is the generation of structured light, specifically the manufacturing of Pancharatman-Berry (PB) devices, capable of generating optical vortices with angular momentum. In this work, we propose a thorough theoretical and experimental analysis of the optical response of dye-doped liquid crystal (DDLC) devices by examining their performance in terms of tunability and achromaticity across the whole visible spectrum, considering diattenuation effects and how they affect the efficiency of the devices. We experimentally demonstrate the fabrication of photoaligned devices in the visible range with 532 nm laser light and the robust generation of high-quality optical vortices, achieved by a straightforward and accessible technique using a commercial Variable Spiral Plate (VSP), avoiding the need for complex rotational systems or programmable spatial light modulators. Our results demonstrate that diattenuation effects do not prevent the functionality of the devices across the whole visible spectrum and with extended ranges of achromaticity. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2603_09553 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Vortex beams with tunable "all-with-visible-light" dye-doped liquid crystal q-plates for broadband application Moya, Adrián Sánchez-Montes, Adriana R. Gallego, Sergi Calzado, Eva M. Márquez, Andrés Pascual, Inmaculada Beléndez, Augusto Optics The photoalignment technique for liquid crystal (LC) device fabrication, despite being a well-established method, remains of significant relevance because of its broad applicability. Among its applications, one of particular interest is the generation of structured light, specifically the manufacturing of Pancharatman-Berry (PB) devices, capable of generating optical vortices with angular momentum. In this work, we propose a thorough theoretical and experimental analysis of the optical response of dye-doped liquid crystal (DDLC) devices by examining their performance in terms of tunability and achromaticity across the whole visible spectrum, considering diattenuation effects and how they affect the efficiency of the devices. We experimentally demonstrate the fabrication of photoaligned devices in the visible range with 532 nm laser light and the robust generation of high-quality optical vortices, achieved by a straightforward and accessible technique using a commercial Variable Spiral Plate (VSP), avoiding the need for complex rotational systems or programmable spatial light modulators. Our results demonstrate that diattenuation effects do not prevent the functionality of the devices across the whole visible spectrum and with extended ranges of achromaticity. |
| title | Vortex beams with tunable "all-with-visible-light" dye-doped liquid crystal q-plates for broadband application |
| topic | Optics |
| url | https://arxiv.org/abs/2603.09553 |