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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2016-06-25
Magnetoelectric-Field Microwave Antennas: Far-Field Orbital Angular Momenta from Chiral-Topology Near Fields
By
Maksim Berezin,

    Dr. Maksim Berezin

    Department of Electrical and Computer Engineering

    Ben Gurion University of the Negev

    Israel

    Homepage

Eugene O. Kamenetskii,

    Dr. Eugene O. Kamenetskii

    Department of Electrical and Computer Engineering

    Ben Gurion University of the Negev

    Israel

    Homepage

Reuven Shavit

    Dr. Reuven Shavit

    Department of Electrical and Computer Engineering

    Ben Gurion University of the Negev

    Israel

    Homepage

Progress In Electromagnetics Research B, Vol. 68, 141-157, 2016
doi:10.2528/PIERB16041203 | Google Scholar

Abstract
The near fields in the proximity of a small ferrite particle with magnetic-dipolar-mode (MDM) oscillations have space and time symmetry breakings. Such MDM-originated fields --- called magnetoelectric (ME) fields --- carry both spin and orbital angular momentums. By virtue of unique topology, ME fields are strongly different from free-space electromagnetic (EM) fields. In this paper, we show that because of chiral topology of ME fields in a near-field region, farfield orbital angular momenta (OAM) can be observed, both numerically and experimentally. In a single-element antenna, we obtain a radiation pattern with an angular squint. We reveal that in far-field microwave radiation a crucial role is played by the ME energy distribution in the near-field region.
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Citation
Maksim Berezin, Eugene O. Kamenetskii, and Reuven Shavit, "Magnetoelectric-Field Microwave Antennas: Far-Field Orbital Angular Momenta from Chiral-Topology Near Fields," Progress In Electromagnetics Research B, Vol. 68, 141-157, 2016.
doi:10.2528/PIERB16041203
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