Journal
OPTICS LETTERS
Volume 31, Issue 10, Pages 1534-1536Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.31.001534
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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 Am lattice constant, the 65 Am 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. (c) 2006 Optical Society of America.
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