Based on the numerical finding of a two-dimensional photonic material which has large complete photonic gaps and structural uniformity, we propose a photonic plate which can be used to design arbitrarily shaped photonic mirrors and microcavities on a wavelength scale. This paper describes a wavelength-sized parabolic mirror that can collect light very efficiently without loss. In addition, we present circular microcavities of tunable resonance frequencies with high values of quality factor Q.