We demonstrate, in a planar two-dimensional (2D) configuration, in the opti
cal regime a clear association of two photonic crystal elements and the abi
lity to produce a low-loss coupled system. A channel waveguide is brought t
o between two and five crystal rows (450 to 1126 nm) from a 2D microcavity
fabricated in a GaAs/AlGaAs waveguide. We probe these two elements individu
ally and explore their interaction. (C) 2001 American Institute of Physics.