The diffraction of light by acoustic waves on a film is characterized and analyzed in detail. This investigation includes the mechanism of excitation of acoustic waves, the propagation of acoustic waves, and diffraction of light. The acoustic waveguiding phenomenon in unidirectionally stressed film is analyzed. Applications to optical processing are discussed. These include spectrum analysis, simultaneous parallel array data processing, and sequential multiproduct processing. Agenda for future development are discussed.
Alfred E. Attard, "Thin-film traveling-wave light modulator," Appl. Opt. 21, 2348-2355 (1982)