amplitude modulation

Focusing light through random photonic media by binary amplitude modulation
D. Akbulut, T. J. Huisman, E. G. van Putten, W. L. Vos, and A. P. Mosk
Opt. Express 19, 4017 – 4029 (2011)

Spatial amplitude and phase modulation using commercial twisted nematic LCDs
E.G. van Putten, I. M. Vellekoop, and A. P. Mosk
Appl. Opt. 47, 2076-2081 (2008)