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首页> 外文期刊>Applied Physics Letters >Realization of electron vortices with large orbital angular momentum using miniature holograms fabricated by electron beam lithography
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Realization of electron vortices with large orbital angular momentum using miniature holograms fabricated by electron beam lithography

机译：利用电子束光刻技术制作的微型全息图实现大轨道角动量的电子涡旋

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摘要

Free electron beams that carry high values of orbital angular momentum (0AM) possess large magnetic moments along the propagation direction. This makes them an ideal probe for measuring the electronic and magnetic properties of materials, as well as for fundamental experiments in magnetism. However, their generation requires the use of complex diffractive elements, which usually take the form of nano-fabricated holograms. Here, we show how the limitations of the current fabrication of such holograms can be overcome by using electron beam lithography. We demonstrate experimentally the realization of an electron vortex beam with the largest OAM value that has yet been reported to the first diffraction order (L= 1000/1), paving the way for even more demanding demonstrations and applications of electron beam shaping.
机译：携带高值轨道角动量（0AM）的自由电子束沿传播方向具有较大的磁矩。这使它们成为测量材料的电子和磁性以及磁性基础实验的理想探针。然而，它们的产生需要使用复杂的衍射元件，其通常采用纳米级全息图的形式。在这里，我们展示了如何通过使用电子束光刻技术来克服目前这种全息图制造的局限性。我们通过实验证明了具有最大OAM值的电子涡流束的实现，该值已被报道为第一衍射级（L = 1000/1），为更加苛刻的电子束成形演示和应用铺平了道路。

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  • 来源
    《Applied Physics Letters》 |2017年第9期|093113.1-093113.5|共5页
  • 作者

    E. Mafakheri; A H. Tavabi; P.-H. Lu; R. Balboni; F. Venturi; C. Menozzi; G. C. Gazzadi; S. Frabboni; A. Sit; R. E. Dunin-Borkowski; E. Karimi; V. Grillo;

  • 作者单位

    Dipartimento di Fisica Informatica e Matematica, Universita di Modena e Reggio Emilia, via G Campi 213/a, 1-41125 Modena, Italy;

    Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons (ER-C) and Peter Gruenberg Institute (PGI), Forschungszentrum Juelich, D-52425 Juelich, Germany;

    Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons (ER-C) and Peter Gruenberg Institute (PGI), Forschungszentrum Juelich, D-52425 Juelich, Germany;

    CNR-IMM, Via P. Gobetti 101,1-40129 Bologna, Italy;

    Dipartimento di Fisica Informatica e Matematica, Universita di Modena e Reggio Emilia, via G Campi 213/a, 1-41125 Modena, Italy,CNR-Istituto Nanoscienze, Centro S3, Via G Campi 213/a, 1-41125 Modena, Italy;

    Dipartimento di Fisica Informatica e Matematica, Universita di Modena e Reggio Emilia, via G Campi 213/a, 1-41125 Modena, Italy,CNR-Istituto Nanoscienze, Centro S3, Via G Campi 213/a, 1-41125 Modena, Italy;

    CNR-Istituto Nanoscienze, Centro S3, Via G Campi 213/a, 1-41125 Modena, Italy;

    Dipartimento di Fisica Informatica e Matematica, Universita di Modena e Reggio Emilia, via G Campi 213/a, 1-41125 Modena, Italy,CNR-Istituto Nanoscienze, Centro S3, Via G Campi 213/a, 1-41125 Modena, Italy;

    Department of Physics, University of Ottawa, 25 Templeton, Ottawa, Ontario KIN 6N5 Canada;

    Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons (ER-C) and Peter Gruenberg Institute (PGI), Forschungszentrum Juelich, D-52425 Juelich, Germany;

    Department of Physics, University of Ottawa, 25 Templeton, Ottawa, Ontario KIN 6N5 Canada,Department of Physics, Institute for Advanced Studies in Basic Sciences, 45137-66731 Zanjan, Iran;

    CNR-Istituto Nanoscienze, Centro S3, Via G Campi 213/a, 1-41125 Modena, Italy,CNR-IMEM Parco Area delle Scienze 37/A, I-43124 Parma, Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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