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Investigation on dispersive properties of photonic crystals for employment of Z-scan method

Title
Investigation on dispersive properties of photonic crystals for employment of Z-scan method
Authors
Hwang J.Wu J.W.
Ewha Authors
우정원황지수
SCOPUS Author ID
우정원scopus
Issue Date
2007
Journal Title
Proceedings of SPIE - The International Society for Optical Engineering
ISSN
0277-786XJCR Link
Citation
vol. 6480
Indexed
SCOPUS scopus
Abstract
We calculate linear and nonlinear optical effective refractive indices of finite period one-dimensional photonic crystals, Bragg reflectors and photonic crystal microcavities, by using numerical dispersion relation. We discuss optical dispersive properties of both the Bragg reflectors and the photonic crystal microcavities. For Bragg reflectors, optical Kerr nonlinearity is enhanced at bandgap edges, and the singularity problem at bandgap edges, occurred in Bloch index for infinite structure, is removed by the numerical dispersion relation. Also, the numerical dispersion relation is adopted to describe optical property of photonic crystal microcavities, for which Bloch index is not available. Optical Kerr nonlinearity in photonic crystal microcavities is found to be more enhanced at optical defect modes than at bandgap edges. Z-scan profiles of a Bragg reflector and a photonic crystal microcavity are numerically simulated based on the calculated nonlinear effective refractive indices, which show peaks at bandgap edges and defect mode incurred by dispersion anomaly.
DOI
10.1117/12.698029
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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