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Propagation of high-order circularly polarized Bessel beams and vortex generation in uniaxial crystals

机译:单轴晶体中高阶圆偏振贝塞尔光束的传播和涡旋的产生

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摘要

We investigate the generation and transformation of Bessel beams through linear and nonlinear optical crystals. We outline the gen-eration of high-order vortices due to propagation of Bessel beams along the optical axis of uniaxial crystals and expand this to the nonlinear regime by outlining a new phase-matching process (full conical phase matching) in second harmonic generation of vector Bessel beams for various sym-metries in uniaxial crystals. We demonstrate the principles experimentally in a uniaxial BBO crystal and find excellent agreement between the ex-perimental and theoretical results. The results imply a coupling of the intrinsic and extrinsic optical angular momentum of the resulting fields, which may have importance in studies involving quantum entanglement of the angular momentum basis of light.
机译:我们研究了通过线性和非线性光学晶体的贝塞尔光束的产生和转换。我们概述了由于贝塞尔光束沿单轴晶体光轴传播而引起的高阶涡旋的产生,并概述了二次谐波产生中的新的相位匹配过程(全圆锥形相位匹配),将其扩展到非线性状态。单轴晶体中各种对称性的矢量贝塞尔光束。我们在单轴BBO晶体中通过实验演示了原理,并在实验和理论结果之间找到了极好的一致性。结果暗示了所得场的本征和非本征光学角动量的耦合,这在涉及光的角动量基础的量子纠缠的研究中可能具有重要意义。

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  • 来源
    《Optical engineering》 |2011年第5期|p.059001.1-059001.9|共9页
  • 作者单位

    IP NAS Belarus B.I. Stepanov Institute of Physics 68 Nezavisimosti Avenue Minsk, 220072 Belarus;

    IP NAS Belarus B.I. Stepanov Institute of Physics 68 Nezavisimosti Avenue Minsk, 220072 Belarus;

    IP NAS Belarus B.I. Stepanov Institute of Physics 68 Nezavisimosti Avenue Minsk, 220072 Belarus;

    IP NAS Belarus B.I. Stepanov Institute of Physics 68 Nezavisimosti Avenue Minsk, 220072 Belarus;

    CSIR National Laser Centre P.O. Box 395 Pretoria 0001, South Africa University of KwaZulu-Natal School of Physics Private Bag X54001 Durban 4000, South Africa;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    bessel beams; optical vortices; uniaxial crystals; second harmonic generation;

    机译:贝塞尔光束光学涡旋;单轴晶体;二次谐波产生;

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