Optical modelling of luminescent cascade systems with the adding-doubling method

Abstract

The adding-doubling method can be used to determine the reflection and transmission characteristics of materials exhibiting bulk scattering and photoluminescence. In this work, the method is adapted to allow the implementation of luminescent cascade systems. Distinctive for these systems are the multiple re-absorption and re-emission events by the different luminescent materials. The proposed method is validated by comparing its results to the simulation results of traditional Monte Carlo ray tracing. The average difference over the visible wavelength range between the two methods is found to be smaller than 0.5 %. A large reduction in computation time was realized compared to the ray tracing simulations, which makes the adding-doubling method an excellent optimization tool.