Slow light in a dielectric waveguide with negative-refractive-index photonic crystal cladding.
A slow light waveguide made of a dielectric slab inserted in a two-dimensional photonic crystal with a negative effective refractive index is proposed and numerically studied. The waveguide may possess modes with zero group velocity, and its frequency varies with the thickness of the waveguide. A linearly tapered left-handed photonic crystal waveguide is also proposed and studied. It is shown that the so-called 'trapped rainbow' proposed by Tsakmakidis, Boardman, and Hess [1] is difficult to realize due to a coupling of forward- and backward-propagating modes near zero group velocity. However, different frequency components of a broadband excitation can still be separated through partial accumulation at waveguide sections of different thicknesses.
He
Jinlong
J
Centre for THz Research, College of Mechanical and Electrical Engineering, China Jiliang University, Hangzhou, China.
Jin
Yi
Y
Hong
Zhi
Z
He
Sailing
S
D003198:Computer Simulation; D017076:Computer-Aided Design; D003461:Crystallography / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000295:instrumentation*; D017785:Photons; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation