Design of photonic crystal microcavities in diamond films

We design photonic crystal microcavities in diamond films for applications in quantum information. Optimization of the cavity design by gentle confinement yields a high quality factor Q> 66000 and small mode volume V approximate to 1.1(lambda/ n)(3). In view of experimental applications we consider the influence of material absorption on the cavity Q factors and present a simple interpretation in the framework of a one-dimensional cavity model.