Zhao Yuguang, Grischkowsky D
School of Electrical and Computer Engineering, Oklahoma State University, Stillwater 74078, USA.
Opt Lett. 2006 May 15;31(10):1534-6. doi: 10.1364/ol.31.001534.
We demonstrate effectively two-dimensional (2D) terahertz (THz) photonic bandgap (PBG) structures for transverse electromagnetic (TEM) mode propagation within metal parallel plate waveguides (PPWG). The 2D-PBG structures consisting of square arrays of dielectric cylinders were characterized by THz time-domain spectroscopy (THz-TDS). THz photonic bandgaps were observed, as determined by the 160 mum lattice constant, the 65 mum diameter, and the dielectric constant of the cylinders. The experimental measurements were fitted with excellent agreement to 2D theory, confirming that for TEM mode propagation, effectively 2D propagation experiments can be achieved within the bounded space of the PPWG.
我们有效地展示了用于横向电磁（TEM）模式在金属平行板波导（PPWG）内传播的二维（2D）太赫兹（THz）光子带隙（PBG）结构。由介质圆柱体的方形阵列组成的二维光子带隙结构通过太赫兹时域光谱（THz-TDS）进行了表征。观察到了太赫兹光子带隙，其由160微米的晶格常数、65微米的直径以及圆柱体的介电常数决定。实验测量结果与二维理论拟合得非常好，证实了对于TEM模式传播，在PPWG的有限空间内可以有效地实现二维传播实验。
