Title :
Fast Calculation of Cavity-Mode Characteristics of Photonic Crystal Cavities
Author :
Qiang, Zexuan ; Zhou, Weidong
Author_Institution :
Dept. of Electr. Eng., Texas Univ., Arlington, TX
Abstract :
A fast approach based on effective index perturbation method is proposed to evaluate the intrinsic characteristics of photonic-crystal-slab-based microcavity with two-dimensional finite-difference time-domain (2-D FDTD) technique. For two widely used single defect structures, less than 2% computational error was obtained in calculating the defect mode frequencies. Accurate prediction of cavity modal properties and resonant peak frequencies is feasible based on 2-D FDTD simulation by adjusting the effective index to match the dielectric band edge for donor-like defect mode. The correlation between the modified effective index and the cavity (lasing) mode with the highest quality factor Q offers an efficient tool in the design of defect mode based photonic crystal microcavities
Keywords :
Q-factor; finite difference time-domain analysis; microcavities; photonic band gap; photonic crystals; refractive index; cavity lasing mode; dielectric band edge; effective index perturbation; microcavity; photonic crystal cavities; quality factor; two-dimensional finite-difference time-domain; Computational modeling; Finite difference methods; Microcavities; Perturbation methods; Photonic crystals; Predictive models; Resonance; Resonant frequency; Time domain analysis; Two dimensional displays; Cavity quality factor; defect-mode cavity; effective index method (EIM); effective index perturbation (EIP); photonic crystal slabs (PCSs);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.882289
