Faculty of Physics, University of Warsaw, Warsaw, Poland.
Opt Lett. 2013 Mar 15;38(6):839-41. doi: 10.1364/OL.38.000839.
We report on experimental evidence of unidirectional transmission of terahertz waves through a pair of metallic gratings with different periods. The gratings are optimized for a broadband transmission in one direction, accompanied with a high extinction rate in the opposite direction. In contrast to previous studies, we show that the zero-order nonreciprocity cannot be achieved. Nonetheless, we confirm that the structure can be used successfully as an asymmetric filter.
我们报告了通过一对具有不同周期的金属光栅实现太赫兹波单向传输的实验证据。这些光栅在一个方向上实现了宽带传输，并在相反方向上具有高消光率。与以前的研究不同，我们表明无法实现零阶非互易性。尽管如此，我们确认该结构可以成功用作非对称滤波器。
