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Both s-polarized and p-polarized phase resonances in one-dimensionally compound transmission gratings are analyzed, modeled, and measured. We demonstrate that s-polarized phase resonances occur with similar characteristics of p-polarized phase resonances, with narrow bandwidths, high Q values, and highly amplified fields. The phase difference of π radian between the fields in the coupled cavities produces light circulation and an inversion of the transmissivity/opacity of the structure. The dependencies of bandwidth and wavelength of the resonances on structural and material properties are described, as well as the way light flows in the structure when the phase resonances are excited.

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