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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. © 2004 American Institute of Physics.