Guided-Wave Acousto-Optic Interaction in a ZnO Thin Film on a Nonpiezoelectric Substrate

摘要: The possibility of Surface Acousto-Optic (SAO) devices such as deflectors, modulators, and mode converters playing an important role in integrated optics led to the extensive study Bragg diffraction Guided Optical Waves (GOW) by Acoustic (SAW). Since Kuhn et al. [6.1] first demonstrated SAW-GOW deflectors numerous experiments have been carried out on various thin-film configurations. An list references prior works has provided [6.2] Chap. 5. All performed thus far are classified device structure into two categories, i.e., if substrate which optical waveguide is constructed a piezoelectric material, it category, while nonpiezoelectric second category. many kinds must be substrates, desirable construct SAO with With this category SAW can launched means thin film ZnO deposited substrate. ZnO, memeber hexagonal wurtzite class, low dielectric constant high electromechanical coupling factor making useful material for technology. Moreover, interesting GOW because transparent from 0.4 2 µm should optically low-loss material.