  We present a waveguide-coupled photonic crystal H1 cavity structure in which
the orthogonal dipole modes couple to spatially separated photonic crystal
waveguides. Coupling of each cavity mode to its respective waveguide with equal
efficiency is achieved by adjusting the position and orientation of the
waveguides. The behavior of the optimized device is experimentally verified for
where the cavity mode splitting is larger and smaller than the cavity mode
linewidth. In both cases, coupled Q-factors up to 1600 and contrast ratios up
to 10 are achieved. This design may allow for spin state readout of a
self-assembled quantum dot positioned at the cavity center or function as an
ultra-fast optical switch operating at the single photon level.
