diffusion theory

How to distinguish elastically scattered light from Stokes shifted light for solid-state lighting?
M. L. Meretska, A. Lagendijk, H. Thyrrestrup, A. P. Mosk, W. L. Ijzerman, and W. L. Vos
J. Appl. Phys. 119, 093102: 1-9 (2016)

Light exiting from real photonic band gap crystals is diffuse and strongly directional
A. F. Koenderink, and W. L. Vos
Phys. Rev. Lett. 91, 213902: 1-4 (2003)