Статья

Controlling the orbital angular momentum of high harmonic vortices

Fanqi KongDepartment of Physics, University of Ottawa, 25 Templeton St, Ottawa, Ontario, Canada K1N 6N5Chunmei ZhangDepartment of Physics, University of Ottawa, 25 Templeton St, Ottawa, Ontario, Canada K1N 6N5Frédéric BouchardDepartment of Physics, University of Ottawa, 25 Templeton St, Ottawa, Ontario, Canada K1N 6N5Zhengyan LiDepartment of Physics, University of Ottawa, 25 Templeton St, Ottawa, Ontario, Canada K1N 6N5Graham G. BrownDepartment of Physics, University of Ottawa, 25 Templeton St, Ottawa, Ontario, Canada K1N 6N5Dong Hyuk KoDepartment of Physics, University of Ottawa, 25 Templeton St, Ottawa, Ontario, Canada K1N 6N5T. J. HammondDepartment of Physics, University of Ottawa, 25 Templeton St, Ottawa, Ontario, Canada K1N 6N5Ladan ArissianJoint Attosecond Science Laboratory, University of Ottawa and National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, Canada K1N 5A2Robert W. BoydDepartment of Physics, University of Ottawa, 25 Templeton St, Ottawa, Ontario, Canada K1N 6N5Ebrahim KarimiDepartment of Physics, University of Ottawa, 25 Templeton St, Ottawa, Ontario, Canada K1N 6N5P. B. CorkumDepartment of Physics, University of Ottawa, 25 Templeton St, Ottawa, Ontario, Canada K1N 6N5

2017en

ABI

Аннотация

Optical vortices, which carry orbital angular momentum (OAM), can be flexibly produced and measured with infrared and visible light. Their application is an important research topic for super-resolution imaging, optical communications and quantum optics. However, only a few methods can produce OAM beams in the extreme ultraviolet (XUV) or X-ray, and controlling the OAM on these beams remains challenging. Here we apply wave mixing to a tabletop high-harmonic source, as proposed in our previous work, and control the topological charge (OAM value) of XUV beams. Our technique enables us to produce first-order OAM beams with the smallest possible central intensity null at XUV wavelengths. This work opens a route for carrier-injected laser machining and lithography, which may reach nanometre or even angstrom resolution. Such a light source is also ideal for space communications, both in the classical and quantum regimes.

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Идентификаторы

DOI: 10.1038/ncomms14970

Цитирования и источники

Цитирований: 3Использованных источников: 0

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