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Abstract
In this paper, transmission spectrum and output intensity profile of a 1D photonic crystal micro-cavity is studied by using the transfer matrix method. It is shown that the transmission spectrum characteristics of the structure irradiated by a Gaussian beam are noticeably different from the plane-wave irradiation transmission spectrum. A ring-shape output intensity profile is observed under irradiation of a common Gaussian beam profile. The various characteristics of output intensity profile are investigated.