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One-dimensional photonic bandgap microcavities for strong optical confinement in GaAs and GaAs/AlxOy semiconductor waveguides

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9 Author(s)
D. J. Ripin ; Center for Mater. Sci. & Eng., MIT, Cambridge, MA, USA ; Kuo-Yi Lim ; G. S. Petrich ; P. R. Villeneuve
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Photonic bandgap (PBG) waveguide microcavities with tightly confined resonant optical modes have been designed, fabricated using high-dielectric-contrast GaAs/AlxOy III-V compound semiconductor structures, and characterized optically. The photonic crystal lattices are defined by one-dimensional (1-D) arrays of holes in waveguides, and a controlled defect in the spacing between two holes of an array defines a microcavity. Waveguide microcavity resonances have been studied in both monorail and suspended air-bridge geometries. Resonance states with cavity Q's as high as 360 were measured at wavelengths near 1.55 μm, with modal volumes as small as 0.026 μm, which corresponds to only two times (λ/2n)3

Published in:

Journal of Lightwave Technology  (Volume:17 ,  Issue: 11 )