Transmission of images with subwavelength resolution to distances of several wavelengths in the microwave range
Transmission of images with subwavelength resolution to distances of several wavelengths in the microwave range
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DOI：
10.1103/physrevb.77.193108
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发表时间：
2008-05-01
影响因子：
3.7
通讯作者：
Parini, Clive
中科院分区：
文献类型：
--
作者：
Belov, Pavel A.;Zhao, Yan;Parini, Clive
我们报告的实验结果表明，传输的微波图像通过一个阵列的平行金属棒的距离是3.5倍大于波长。这种成像设备的分辨率比波长小15倍。由长金属棒形成的透镜的放大、缩小和重复特性为在微波范围内的亚波长成像提供了独特的解决方案。这种透镜的分辨率主要由特征周期决定，其仅受制造能力的限制，而不受任何物理约束。透镜可以按比例缩小，以在太赫兹和中红外频率下工作。
We report experimental results that demonstrate transmission of a microwave image by means of an array of parallel metallic rods over a distance that is 3.5 times greater than the wavelength. The resolution of such an imaging device is 15 times less than the wavelength. The magnifying, demagnifying, and repeating properties of the lenses formed by the long metallic rods provide a unique solution for subwavelength imaging at the microwave range. The resolution of such lenses is mainly determined by the characteristic period, which is only limited by the fabrication capability rather than by any physical constraints. The lenses can be scaled down to operate at terahertz and midinfrared frequencies.