Dj. Ripin et al., One-dimensional photonic bandgap microcavities for strong optical confinement in GaAs and GaAs/AlxOy semiconductor waveguides, J LIGHTW T, 17(11), 1999, pp. 2152-2160
Photonic bandgap (PBG) waveguide microcavities with tightly confined resona
nt optical modes have been designed, fabricated using high-dielectric-contr
ast 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 be
tween two holes of an array defines a microcavity, Waveguide microcavity re
sonances have been studied in both monorail and suspended air-bridge geomet
ries. Resonance states with cavity Q's as high as 360 mere measured at wave
lengths near 1.55 mu m, with modal volumes as small as 0.026 mu m(3), which
corresponds to only two times (lambda/2n)(3).