profiles of H1 PhC microcavities, and our experimental devices agree well with the simulation and theoretical results. We have identified PhC designs that provide excellent vertical beaming of the photoluminescence signal, as well as high contrast reflection dips up to 60$\%$. In our best compromise structure, we find that the simulated Q remains high at 15,000 and the collection efficiency is $80\%$ into a microscope objective with an NA of 0.8. The maximum mode matching of this device to a single-mode fiber is found to be 92$\%$. These results demonstrate that this platform is well-suited for realizing quantum information protocols in the solid state.

Simulation and experimental results for tuning $r_{sm}/r$ {#fdtd}
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![(a) Simulated Q of the H dipole mode as a function of $r_{sm}/r$, where $r_{sm}$ represents the radius of the six nearest holes, and $r$ represents the radius of the other holes in the PhC lattice. (b) Simulated collection efficiency as a function of $r_{sm}/r$ for NA $=$ 0.5 (in blue), 0.8 (in red), and 0.9 (in green). The ideal compromise value, $r_{sm}/r=0.64$, is indicated by the red ellipse, where the Q is 17,000 and the coupling efficiency for an objective with NA of 0.8 is 40$\%$.[]{data-label="figQrsm"}](fig8.eps){width="40.00000%"}

