LIGHT MODULATOR AND SUBSTRATE HAVING AN ENERGY CONVERSION LAYER

Some embodiments are directed to a transparent substrate for use in a light modulator. The light modulator has an optical layer. The transparent substrate has at least one electrode system applied on the substrate. The electrode system comprises a stack of a substrate-side electrode, an energy conversion layer, and an optical layer-side electrode. The optical layer-side electrode is arranged to modulate an electric field in the optical layer. The energy conversion layer is configured to convert between energy external to the substrate and a voltage difference between the substrate-side electrode and the optical layer-side electrode.