MATRIX FORMALISM FOR CALCULATION OF THE LIGHT-BEAM INTENSITY IN STRATIFIED MULTILAYERED FILMS, AND ITS USE IN THE ANALYSIS OF EMISSION-SPECTRA

Matrix formulation to describe the light propagation in stratified multilayered films has been extended to a system with phase incoherence. Several equations for the reflectance, transmittance, and light beamintensity in the film system are derived from the formulation. Some formulas previously proposed arecorrected in reference to the present method. The beam intensity description is used for the calculation oflight emissive power from multilayered films having a temperature gradient. It is found that the equationsderived here are exactly equivalent to those derived from the radiative transfer equation. However, thepresent method is more tractable, and can be readily used for a film system with any number of layers. © 1990 Optical Society of America.