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Analysis of modes in a freestanding microsquare resonator by 3-D finite-difference time-domain simulation

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4 Author(s)
Chen, Qin ; State Key Lab. on Integrated Optoelectron., Chinese Acad. of Sci., Beijing, China ; Yong-Zhen Huang ; Wei-Hua Guo ; Li-Juan Yu

Modes in a microsquare resonator slab with strong vertical waveguide consisting of air/semiconductor/air are analyzed by three-dimensional (3-D) finite-difference time-domain simulation, and compared with that of two-dimensional (2-D) simulation under effective index approximation. Mode frequencies and field distributions inside the resonator obtained by the 3-D simulation are in good agreement with those of the 2-D approximation. However, field distributions at the boundary of the resonator obtained by 3-D simulation are different from that of the 2-D simulation, especially the vertical field distribution near the boundary is great different from that of the slab waveguide, which is used in the effective index approximation. Furthermore the quality factors obtained by 3-D simulation are much larger than that by 2-D simulation for the square resonator slab with the strong vertical waveguide.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:41 ,  Issue: 7 )