Journal
OPTICAL AND QUANTUM ELECTRONICS
Volume 37, Issue 1-3, Pages 277-292Publisher
SPRINGER
DOI: 10.1007/s11082-005-1185-5
Keywords
optical waveguides; photonic crystals; Fabry-Perot cavities
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A theoretical study of cavity modes in one-dimensional photonic crystal slabs embedded in Silicon-on-Insulator structures is reported. Three different methods are employed, namely a guided-mode expansion in which the coupling to radiative modes is treated by perturbation theory, a grating or scattering-matrix method for calculating the surface reflectance, and a Fourier modal expansion for in-plane transmission calculations. It is shown that all methods lead to the same values for the quality factors of cavity modes for both first- and second-order Bragg mirrors. We conclude that the quality factor of a cavity mode can be determined with optical reflectance from the surface of the slab.
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