Formation of Millimeter Waves with Electrically Tunable Orbital Angular Momentum
Formation of Millimeter Waves with Electrically Tunable Orbital Angular Momentum
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DOI：
10.3390/coatings11050569
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发表时间：
2021-05
期刊：
影响因子：
3.4
通讯作者：
A. Altynnikov;R. Platonov;A. Tumarkin;P. Petrov;A. Kozyrev
中科院分区：
文献类型：
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作者：
A. Altynnikov;R. Platonov;A. Tumarkin;P. Petrov;A. Kozyrev
提出了一种用可调的非零轨道角动量（OAM）形成电磁波的方法。该方法基于使用电气可调的铁电透镜将入射平面波转换为螺旋波。它使用具有特殊离散拓扑的高抗性薄/厚膜电极。描述了膜电极拓扑结构与透镜可能形成的oaM模式的最高级别之间的相关性。基于BA0.55SR0.45TIO3铁电材料并以60 GHz的频率运行的镜头原型经过设计，制造和测试。测量了由原型形成的L = +1的OAM波的幅度和相分布，以确认该方法的有效性。所提出的镜头具有优势的组合，例如低维，对OAM模式的电气控制以及在毫米波长范围内运行的可能性。
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.