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Appl. Phys. Lett. 99, 204102 (2011); http://dx.doi.org/10.1063/1.3659466 (3 pages)

Experimental verification of photon angular momentum and vorticity with radio techniques

Fabrizio Tamburini1, Elettra Mari2, Bo Thidé3, Cesare Barbieri1, and Filippo Romanato1,4

1Department of Physics and Astronomy, University of Padova, via Marzolo 8, IT-35131 Padova, Italy
2CISAS, Centro Interdipartimentale di Studi e Attività Spaziali G. Colombo, University of Padova, Via Venezia 15, IT- 35131 Padova, Italy
3Swedish Institute of Space Physics, Ångström Laboratory, Box 537, SE-75121 Uppsala, Sweden
4LaNN, Laboratory for Nanofabrication of Nanodevices, Venetonanotech, via Stati Uniti 4, IT-35100 Padova, Italy

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(Received 21 May 2011; accepted 17 October 2011; published online 16 November 2011)

The experimental evidence that radio techniques can be used for synthesizing and analyzing non-integer electromagnetic (EM) orbital angular momentum (OAM) of radiation is presented. The technique used amounts to sample, in space and time, the EM field vectors and digitally processing the data to calculate the vortex structure, the spatial phase distribution, and the OAM spectrum of the radiation. The experimental verification that OAM-carrying beams can be readily generated and exploited by using radio techniques paves the way to an entirely new paradigm of radar and radio communication protocols.

© 2011 American Institute of Physics

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KEYWORDS and PACS

PACS

  • 84.40.Ua

    Telecommunications: signal transmission and processing; communication satellites

  • 84.40.Xb

    Telemetry: remote control, remote sensing; radar

  • 41.20.Jb

    Electromagnetic wave propagation; radiowave propagation

ARTICLE DATA

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

For access to fully linked references, you need to log in.
    F. Tamburini, G. Anzolin, G. Umbriaco, A. Bianchini, and C. Barbieri, Phys. Rev. Lett. 97, 163903 (2006).

    B. Thidé, H. Then, J. Sjöholm, K. Palmer, J. E. S. Bergman, T. D. Carozzi, Ya. N. Istomin, N. H. Ibragimov, and R. Khamitova, Phys. Rev. Lett. 99, 087701 (2007).

    J. B. Pors, S. S. R. Oemrawsingh, A. Aiello, M. P. van Exter, E. R. Eliel, G. W. t'Hooft, and J. P. Woerdman, Phys. Rev. Lett. 101, 120502 (2008).


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