Influence of Dielectric Loss on Quality Factors of Photonic Crystal Microcavity Modes
XIONG Zhi-Gang, LI Zhi-Yuan, ZHANG Dao-Zhong
Optical Physics Laboratory, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
Influence of Dielectric Loss on Quality Factors of Photonic Crystal Microcavity Modes
XIONG Zhi-Gang, LI Zhi-Yuan, ZHANG Dao-Zhong
Optical Physics Laboratory, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
摘要We numerically investigate the quality factors of two-dimensional (2D) photonic crystal (PC) microcavities using an auxiliary differential equations (ADE) technique in the context of finite-difference time-domain (FDTD) method. The microcavities are formed by point defects in the air hole lattice hexagonally patterned in ZnO (zinc oxide) matrix. The quality factors of these microcavities are limited primarily by the absorption of the background dielectric. We show that the ratio between the quality factors of microcavities in lossy and lossless background dielectric depends on the overlap between the field of cavity modes and the absorbing background dielectric in addition to the magnitude of absorption. These results will be helpful when designing and optimizing photonic crystal microcavities formed in lossy medium.
We numerically investigate the quality factors of two-dimensional (2D) photonic crystal (PC) microcavities using an auxiliary differential equations (ADE) technique in the context of finite-difference time-domain (FDTD) method. The microcavities are formed by point defects in the air hole lattice hexagonally patterned in ZnO (zinc oxide) matrix. The quality factors of these microcavities are limited primarily by the absorption of the background dielectric. We show that the ratio between the quality factors of microcavities in lossy and lossless background dielectric depends on the overlap between the field of cavity modes and the absorbing background dielectric in addition to the magnitude of absorption. These results will be helpful when designing and optimizing photonic crystal microcavities formed in lossy medium.
XIONG Zhi-Gang;LI Zhi-Yuan;ZHANG Dao-Zhong. Influence of Dielectric Loss on Quality Factors of Photonic Crystal Microcavity Modes[J]. 中国物理快报, 2008, 25(9): 3292-3295.
XIONG Zhi-Gang, LI Zhi-Yuan, ZHANG Dao-Zhong. Influence of Dielectric Loss on Quality Factors of Photonic Crystal Microcavity Modes. Chin. Phys. Lett., 2008, 25(9): 3292-3295.
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2008, Vol. 25 
