期刊
OPTICS EXPRESS
卷 19, 期 5, 页码 4085-4090出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.19.004085
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资金
- HKUST [CERG 612208, CERG 612310, CERG 612409]
- European Commission [255914]
Using a photoalignment technique with a sulphonic azo-dye as the surfactant aligning material, we fabricated electrically tunable liquid crystal q-plates with topological charge 0.5, 1.5 and 3 for generating optical vortex beams with definite orbital angular momentum (OAM) 1,3 and 6 per photon (in units of (h) over bar), respectively. We carried out several tests on our q-plates, including OAM tomography, finding excellent performances. These devices can have useful applications in general and quantum optics. (C) 2011 Optical Society of America
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