Slowing down the speed of terahertz guiding modes of a metal air-gap waveguide by using a coupled plasmonic cavity

Abstract

Articles you may be interested inMinimization of reflection at the boundaries of a finite-size coupled terahertz cavity in a metal air-gap waveguide Properties of defected one-dimensional terahertz plasmonic crystal films in a metal air-gap waveguide J. Appl. Phys. 110, 093101 (2011); 10.1063/1.3658255Photonic band anti-crossing in a coupled system of a teraherz plasmonic crystal film and a metal air-gap waveguideWe present numerical and experimental demonstration of slowing down the speed of terahertz guiding modes of a metal air-gap waveguide by using a one-dimensional coupled plasmonic cavity. The speed of terahertz guiding modes gets slower as a distance between metal plates of the waveguide decreases because the coupling strength between cavities gets weaker as the distance decreases. The coupled plasmonic cavities in a metal air-gap waveguide could be useful in enhancing the interaction between the guiding modes and matters and manipulating terahertz waves in a time domain. V C 2012 American Institute of Physics. [http://dx.

Experimental demonstration of slow self-collimated beams through a coupled zigzag-box resonator in a two-dimensional photonic crystal

“…The group velocity (group index) noticeably decreases (increases) to less (larger) than 0.01c (100) as a frequency approaches to the band edges. The oscillatory behavior in the transmission spectra, dispersion relation and group velocity curve, was also observed in different coupled resonator systems and could be reduced by modifying the input and output interfaces of the couple resonator system [7,[25][26][27][28][29]. For the coupled resonator system considered in this study, a practical way to reduce the troublesome reflections is introducing rods at the ends of the coupled resonator.…”

Efficient coupling of self-collimated beams to slow light modes of a coupled zigzag-box resonator via antireflection structures in a photonic crystal

“…However, it was observed that unwanted reflections at the boundaries of a finite-size CZBR give rise to unnecessary finite-size effects, such as strong Fabry-Pérot oscillations in the transmission spectrum and variations in the group velocity curve. Hence finite-size effects, which are commonly observed in various coupled resonator systems [3,28], ruin the performance of a slow light device. Therefore, an efficient and practical method to reduce unwanted reflections at the PC-CZBR interface is required in order to increase the possibility of the application of slow self-collimated beams in PCs.…”