Control of dispersion in photonic crystal waveguides using group symmetry theory
classification
⚛️ physics.optics
keywords
dispersiontheorycouplingcrystalgroupphotonicwaveguidesab-initio
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We demonstrate dispersion tailoring by coupling the even and the odd modes in a line-defect photonic crystal waveguide. Coupling is determined ab-initio using group theory analysis, rather than by trial and error optimisation of the design parameters. A family of dispersion curves is generated by controlling a single geometrical parameter. This concept is demonstrated experimentally on 1.5mm-long waveguides with very good agreement with theory.
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