Vovchuk Dmytro, Khobzei Mykola, Apostoliuk Mykhailo, Tkach Vladyslav, Simovski Constantin
Department of Radio Engineering and Information Security, Yuriy Fedkovych Chernivtsi National University, Chernivtsi, Ukraine.
Department of Electronics and Nanoengineering, Aalto University, Espoo, Finland.
Nanophotonics. 2023 Jan 16;12(14):2797-2807. doi: 10.1515/nanoph-2022-0538. eCollection 2023 Jul.
In the paper the binary mechanism of the long-distance image transfer in a wire-medium (WM) endoscope is suggested and studied. We have shown that a discrete image formed by a set of point sources TM-polarized with respect to the WM can be transferred from the input to the output of the endoscope in a very broad frequency band. The underlying physics is the formation of local channels by a group of four adjacent wires. It allows the transfer of the near field beyond the Fabry-Perot resonances at which the known canalization mechanism offers the image. Both numerical simulations and experimental measurements confirm the deeply subwavelength resolution on the output WM interface. The binary imaging was studied until the frequencies at which the endoscope length exceeds 5. The transfer is possible in the entire investigated frequency range (from 1 up to 4 GHz) except for the frequencies where the Fabry-Perot resonance are not enough suppressed.
本文提出并研究了线介质（WM）内窥镜中长距离图像传输的二元机制。我们已经表明，由相对于WM呈TM极化的一组点源形成的离散图像可以在非常宽的频带内从内窥镜的输入端传输到输出端。其基本物理原理是由四根相邻导线组成的组形成局部通道。这使得近场能够在法布里-珀罗共振之外进行传输，而在法布里-珀罗共振处，已知的管道化机制可提供图像。数值模拟和实验测量均证实了输出WM界面上的深亚波长分辨率。对二元成像进行了研究，直至内窥镜长度超过5的频率。除了法布里-珀罗共振未得到充分抑制的频率外，在整个研究频率范围（从1到4 GHz）内都可以进行传输。
