You searched for: “acousto optics
acousto-optic (s) (noun), acousto-optics (pl)
The science and technology of the interactions between sound waves and light waves passing through solid materials, especially as applied to the modulation and deflection of laser beams by ultrasonic waves which are important in laser and holographic technologies: Samuel Waters was intent on perfecting a system of acousto-optics to enable him to expand his holographic business which printed passes for the local bus system.