Title :
Ultrawideband Low Dispersion Slow Light Waveguides
Author :
Dai, Lei ; Jiang, Chun
Author_Institution :
State Key Lab. of Adv. Opt. Commun. Syst. & Networks, Shanghai Jiaotong Univ., Shanghai, China
fDate :
7/15/2009 12:00:00 AM
Abstract :
In 2-D photonic crystals (PhCs), we demonstrate two novel line-defects slow light waveguides with little group velocity dispersion (less than 1 ps/nm/mm) in which light can propagate with little distortion in a wide frequency range. The first waveguide is composed of air rings located at the each side of the line-defect and the results indicate that a very flat band corresponding to average group velocity of 0.04 c can be achieved in the bandwidth of 4.9 THz. The second waveguide in which the high-index ridge waveguide is sandwiched between two photonic crystals may yield an average group velocity of 0.01777c over a bandwidth of 2.9 THz. Numerical simulations by finite-difference time domain (FDTD) verify the results of the frequency domain.
Keywords :
finite difference time-domain analysis; optical dispersion; optical materials; optical waveguides; photonic crystals; ridge waveguides; slow light; ultra wideband technology; 2D photonic crystal; FDTD simulation; bandwidth 2.9 THz; bandwidth 4.9 THz; finite-difference time domain simulation; group velocity dispersion; high-index ridge waveguide; line-defects; ultrawideband low dispersion slow light waveguide; Group velocity; group velocity dispersion; photonic crystal (PhC); slow light; waveguide;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2009.2017386
