Improvement of delay-bandwidth product in photonic crystal slow-light waveguides.
We report new results about the improvement of delay-bandwidth product in photonic crystal slow light waveguides. Previous studies have obtained large delay-bandwidth product at the price of small average group index. It is pointed out here that the radius and the distance between the two boundary rows of holes have a key contribution for delay-bandwidth product. We show the possibility of improving this factor of merit meanwhile maintaining the same group index. We succeed in improving normal delay-bandwidth product from 0.15 to 0.35, keeping at the same time the group index unchanged at high value of 90. This optimization approach may be applicable for previous flat band slow light devices.
Hao
Ran
R
Department of Components for Microelectronics & Optoelectronics, Institut d'Electronique Fondamentale, Univ Paris-Sud, Orsay 91400, France.
Cassan
Eric
E
Le Roux
Xavier
X
Gao
Dingshan
D
Do Khanh
Van
V
Vivien
Laurent
L
Marris-Morini
Delphine
D
Zhang
Xinliang
X
D003198:Computer Simulation; D003460:Crystallization; D008027:Light; D008962:Models, Theoretical; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation