Asymmetry reversal in the reflection from a two-dimensional photonic crystal

The measured, angle-dependent, reflection spectra of a two-dimensional GaAs photonic crystal consist of an asymmetric peak on top of an oscillating background. At large angles of incidence (>70 degrees), the asymmetry of the peak is observed to flip for p-polarized light. We explain the observed...

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Bibliographic Details
Published in:Optics letters 2007-11, Vol.32 (21), p.3137-3139
Main Authors: DRIESSEN, E. F. C, STOLWIJK, D, DE DOOD, M. J. A
Format: Article
Language:English
Subjects:
Edge and boundary effects
reflection and refraction
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Gratings
Optical elements, devices, and systems
Optical materials
Optical waveguides and coupleurs
Optics
Photonic bandgap materials
Physics
Wave optics
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Summary:The measured, angle-dependent, reflection spectra of a two-dimensional GaAs photonic crystal consist of an asymmetric peak on top of an oscillating background. At large angles of incidence (>70 degrees), the asymmetry of the peak is observed to flip for p-polarized light. We explain the observed spectra with a Fano model that includes loss and interference between a resonant waveguide component and direct Fresnel reflection of the layered structure. We show that the reversal of the asymmetry of the line is due to a change in sign of the direct reflection at Brewster's angle.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.32.003137