Title :
Improved Bend Waveguide Design for Terahertz Transmission
Author :
Degirmenci, E. ; Surre, F. ; Philippe, S. ; Maldonado-Basilio, R. ; Landais, P.
Author_Institution :
RINCE Inst., Dublin City Univ., Dublin, Ireland
Abstract :
Bending waveguides with 90° corners based on a two-dimensional photonic crystal with metallic cylinders arranged in a square lattice are studied for THz wave guiding. Considering single- and double-line defects, five different designs are investigated and assessed in terms of their transmission performance. A better structure is proposed by increasing the number of rods in the bending arc, thus achieving superior performance of the transmission characteristics in comparison to that of the former five designs. A comparison of the improved bend waveguide with a linear waveguide shows a significant reduction of the bending losses. Transmission levels of up to 98% within a 2.5 THz bandwidth (from 1.2 to 3.7 THz) have been accomplished.
Keywords :
optical design techniques; optical lattices; optical waveguides; photonic crystals; terahertz waves; THz wave guiding; bandwidth 2.5 THz; bend waveguide design; bending arc; double-line defects; linear waveguide; metallic cylinders; rods; single-line defects; square lattice; terahertz transmission; two-dimensional photonic crystal; Bandwidth; Dispersion; Electromagnetic waveguides; Geometry; Lattices; Photonic band gap; Propagation losses; THz modeling; THz photonics; photonic crystals (PhCs); wave guides; waveguide bends;
Journal_Title :
Terahertz Science and Technology, IEEE Transactions on
DOI :
10.1109/TTHZ.2011.2177170
