Abstract
Initiated by the analysis of phase relationship and by use of the films’ characteristic matrix expression, we deduced two implicit function expressions of the spacer’ moderate refractive index as well as P-polarization and S-polarization’ central wavelengths. From this, the value of moderate refractive index and corresponding central wavelength can be quickly and accurately obtained. Simulation calculations of two concrete filter designs for single cavity and three cavities prove that the method is feasible.We also proves that the algorithm is highly accurate though the examples data analysis of difference curves with incidence angle from 0° to 30°.
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