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1 April 2022 Exotic polarisation control with digital micromirror devices
Angela L. Dudley
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Proceedings Volume PC11987, Laser Resonators, Microresonators, and Beam Control XXIV; PC119870I (2022) https://doi.org/10.1117/12.2606258
Event: SPIE LASE, 2022, San Francisco, California, United States
Abstract
We will provide a brief overview to Structured Light – in particular to structured polarisation profiles, with specific attention to vector vortex modes, which possess inhomogeneous polarisation profiles. In this work, we create polarisation structures that not only rotate about their propagation axis, but can be controlled to accelerate independently from their spatial profile. This we achieve with weighted superpositions of oppositely charged scalar Bessel beams encoded with a Digital Micromirror Device (DMD). We also investigate their angular accelerating Stokes vectors and intensity transport between local positions within the field. Lastly, we present a digital analogy to Stokes polarimetry in order to extract the polarisation structure of such fields from only four measurements as opposed to the usual six measurements. Instead of using static polarisation optics, we use a Polarization Grating (PG) to project a mode into left- and right-circular states which are subsequently directed to a DMD to impart a phase retardance for full polarisation reconstruction.
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Angela L. Dudley "Exotic polarisation control with digital micromirror devices", Proc. SPIE PC11987, Laser Resonators, Microresonators, and Beam Control XXIV, PC119870I (1 April 2022); https://doi.org/10.1117/12.2606258
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KEYWORDS
Polarization
Digital micromirror devices
Polarization control
Bessel beams
Polarimetry
Structured light
Superposition
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