講演情報
[16p-A37-4]Generation of structured light beams on HOPS and HyPS using multiplexed holograms
〇(D)SUMIT KUMAR SINGH1, Kenji Kinashi1, Naoto Tsutsumi1, Wataru Sakai1, Boaz Jessie Jackin1 (1.Kyoto Inst. of Tech.)
キーワード：
Vector Beam、Polarization Hologram
The existing methods for generating structured light beams, particularly vector beams, often necessitate complex optical setups or intricate material fabrications such as metamaterials or are limited in generating a diverse range of beams. We address these challenges by employing an intensity multiplexed hologram on a birefringent azo-carbazole polymer film. This polymer film exhibits a polarization-selective reconstruction effect, even with an intensity hologram. By utilizing this property, we record two intensity holograms sequentially. In the first exposure, a scalar vortex beam with a topological charge l1 is recorded using a P-polarized writing beam. During the second exposure, a different scalar vortex beam with a different topological charge l2 is recorded with an S-polarized writing beam. When a P+S polarized reading beam traverses the film, both recorded holograms are reconstructed with equal intensity but exhibit orthogonal polarization. Passing this through quarter-wave plate results in the formation of a vector beam of l1≠ l2, which can be represented on higher-order Poincaré spheres (l1= -l2) or hybrid-order Poincaré spheres (l1≠ l2). This approach can be extended to any structured light beam by replacing the vortex beam with any arbitrarily structured light beam, given an appropriate selection.
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