Generating Evanescent Bessel Beams Using Near-Field Plates
Generating Evanescent Bessel Beams Using Near-Field Plates
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DOI：
10.1109/tap.2012.2196947
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发表时间：
2012-07-01
影响因子：
5.7
通讯作者：
Grbic, Anthony
中科院分区：
文献类型：
--
作者：
Imani, Mohammadreza F.;Grbic, Anthony
我们提出了一种近场板，可以产生倏逝贝塞尔光束。金属板由非周期性的同心波纹，围绕一个同轴馈孔。这种设备的设计过程进行了概述。所设计的板模拟使用全波电磁解算器，并示出产生倏逝贝塞尔光束，从而验证其设计和操作。的近场板的性能进行了对比，对同轴探头和近场板的设计，以产生具有相同的波束宽度的艾里焦点图案。这样的设备，能够产生倏逝贝塞尔光束，将发现在近场探测/成像系统，数据存储和生物医学设备中的应用。
We present a near-field plate that can generate an evanescent Bessel beam. The metallic plate consists of nonperiodic concentric corrugations that surround a coaxially fed aperture. The design procedure for such a device is outlined. The designed plate is simulated using a full-wave electromagnetic solver and is shown to produce an evanescent Bessel beam, thereby verifying its design and operation. The performance of the near-field plate is contrasted against a coaxial probe and a near-field plate designed to produce an Airy focal pattern with the same beamwidth. Such a device, capable of producing evanescent Bessel beams, will find applications in near-field probing/imaging systems, data storage, and biomedical devices.