Title :
High-efficiency broad-band transmission through a double-60/spl deg/ bend in a planar photonic Crystal single-line defect waveguide
Author :
Binglin Miao ; Caihua Chen ; Shouyuan Shi ; Murakowski, J. ; Prather, D.W.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Delaware, Newark, DE, USA
Abstract :
We present two designs to improve the transmission of a conventional double-60/spl deg/ bend in a single-line defect planar photonic crystal waveguide by locally optimizing the shape and the size of air holes of a photonic crystal lattice at the corners. We fabricate these devices on a silicon-on-insulator substrate and characterized them using tunable laser sources over a wavelength range from /spl lambda/=1.259 μm to /spl lambda/=1.641 μm. As we show, over a 9% bandwidth, less than 1-dB loss/bend was observed. In order to theoretically validate these experimental results, the three-dimensional finite-difference time-domain simulations are performed and found to agree with the experimental results.
Keywords :
finite difference time-domain analysis; laser tuning; optical design techniques; optical fabrication; optical planar waveguides; photonic crystals; silicon-on-insulator; waveguide discontinuities; 1.259 mum; 1.641 mum; Si; air holes; broadband transmission; device fabrication; double-60/spl deg/ bend; finite-difference time-domain; high-efficiency transmission; photonic crystal lattice; planar photonic crystal waveguide; silicon-on-insulator substrate; single-line defect waveguide; three-dimensional simulations; tunable laser sources; Bandwidth; Design optimization; Laser theory; Lattices; Photonic crystals; Planar waveguides; Shape; Silicon on insulator technology; Tunable circuits and devices; Waveguide lasers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.834888
