Title :
Flatband Slow Wave in Novel Air-Hole-Array Strip Waveguides
Author :
Dai, Lei ; Wang, Fanghua ; Jiang, Chun
Author_Institution :
State Key Lab. of Adv. Opt. Commun. Syst. & Networks, Shanghai Jiao Tong Univ., Shanghai, China
Abstract :
We design two novel air-hole-array strip waveguides: one with elliptic air holes and the other with sandglass-shaped ones. Simulation results prove that flatband modes with low group velocity and low dispersion can be obtained. Each waveguide has its merits; one can choose waveguides with a low group velocity of 2.52??10-3 c and a narrow bandwidth of 2.71 nm (one with elliptic air holes) or a high group velocity of 1.2??10-2 c and a wide bandwidth of 13.6 nm (one with sandglass-shaped air holes), according to the application. Numerical simulation by finite-difference time domain (FDTD) demonstrates the propagation of the broadband pulse.
Keywords :
finite difference time-domain analysis; light propagation; optical design techniques; optical dispersion; optical waveguides; photonic crystals; FDTD analysis; air-hole-array strip waveguides; broadband pulse propagation; elliptic air holes; finite-difference time-domain method; flatband slow wave; group velocity; numerical simulation; optical design; optical dispersion; photonic crystal; sandglass-shaped air holes; Bandwidth; Electromagnetic waveguides; Finite difference methods; Optical buffering; Optical distortion; Optical pulses; Optical resonators; Optical waveguides; Strips; Time domain analysis; Group velocity; group velocity dispersion; photonic crystal; slow light; waveguide;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2009.2030158
