Bragg-Berry mirrors: reflective broadband q-plates
作者： Etienne Brasselet , Mushegh Rafayelyan
DOI: 10.1364/OL.41.003972
关键词:
摘要: We report on the experimental realization of flat mirrors enabling broadband generation optical vortices upon reflection. The effect is based geometric Berry phase associated with circular Bragg reflection phenomenon from chiral uniaxial media. show reflective vortex both diffractive and nondiffractive paraxial light beams using spatially patterned liquid crystal films. intrinsic spectrally character spin-orbit singularities demonstrated over full visible domain. Our results do not rely any birefringent retardation requirement consequently foster development a novel robust elements for photonic technologies.
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