The work presents and analyzes the results of detecting the photoacoustoelectric effect of surface acoustic waves amplification by illumination of a hybrid graphene-LiNbO3 structure. This SAW photoamplification effect is associated with the appearance of an additional photoacoustoelectric current and a decrease of collisional scattering of photoinduced electrons under the action of the SAW electric field. Possible mechanisms of SAW amplification based on the analysis of modern data are discussed. This SAW photoamplification effect can be used to create optoacoustoelectronic devices on a graphene-piezoelectric structures for collecting, amplifying, and detecting superweak sources of THz-radiation photons.

该工作介绍并分析了通过照射混合石墨烯-LiNbO3 结构来检测表面声波放大的光声电效应的结果。这种 SAW 光放大效应与附加光声电流的出现和在 SAW 电场作用下光生电子的碰撞散射减少有关。讨论了基于现代数据分析的 SAW 放大的可能机制。这种 SAW 光放大效应可用于在石墨烯压电结构上创建光声电子器件，用于收集、放大和检测太赫兹辐射光子的超弱源。