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Article

Formation of Millimeter Waves with Electrically Tunable Orbital Angular Momentum

1
Department of Physical Electronics and Technology, Saint Petersburg Electrotechnical University “LETI”, 197376 St. Petersburg, Russia
2
Department of Materials, Imperial College London, London SW7 2AZ, UK
*
Author to whom correspondence should be addressed.
Coatings 2021, 11(5), 569; https://doi.org/10.3390/coatings11050569
Received: 30 March 2021 / Revised: 3 May 2021 / Accepted: 5 May 2021 / Published: 13 May 2021
(This article belongs to the Special Issue Ferroelectric Thin Films and Devices)
A method for forming electromagnetic waves with a tunable nonzero orbital angular momentum (OAM) is proposed. The approach is based on transforming an incident plane wave into a helical one using an electrically tunable ferroelectric lens. It uses high-resistive thin/thick film electrodes with a special discrete topology. The correlation between film electrodes topology and the highest order of OAM modes that the lens can form is described. A lens prototype based on Ba0.55Sr0.45TiO3 ferroelectric material and operating at a frequency of 60 GHz was designed, manufactured, and tested. The amplitude and phase distribution of the OAM wave with l = +1 formed by prototype were measured to confirm the effectiveness of the proposed method. The proposed lens has a combination of advantages such as low dimensions, electrical control over the OAM modes, and the possibility to operate in the millimeter wavelength range. View Full-Text
Keywords: orbital angular momentum; millimeter waves; ferroelectric; films; electrically tunable orbital angular momentum; millimeter waves; ferroelectric; films; electrically tunable
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MDPI and ACS Style

Altynnikov, A.; Platonov, R.; Tumarkin, A.; Petrov, P.K.; Kozyrev, A. Formation of Millimeter Waves with Electrically Tunable Orbital Angular Momentum. Coatings 2021, 11, 569. https://doi.org/10.3390/coatings11050569

AMA Style

Altynnikov A, Platonov R, Tumarkin A, Petrov PK, Kozyrev A. Formation of Millimeter Waves with Electrically Tunable Orbital Angular Momentum. Coatings. 2021; 11(5):569. https://doi.org/10.3390/coatings11050569

Chicago/Turabian Style

Altynnikov, Andrey, Roman Platonov, Andrey Tumarkin, Peter K. Petrov, and Andrey Kozyrev. 2021. "Formation of Millimeter Waves with Electrically Tunable Orbital Angular Momentum" Coatings 11, no. 5: 569. https://doi.org/10.3390/coatings11050569

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