In this work we have performed an analysis of an electrostriction mechanism of optical-to-acoustical energy conversion on the interface of two materials with low optical absorption. We compared this method of conversion with the widely used thermal conversion based on thin metal film. It was shown that the contribution of the electrostriction mechanism is significantly lower in the case of the homogeneous medium. We demonstrated the possibility to amplify the generated acoustic signal by excitation of the guided modes, for which the energy is localized in a thin dielectric layer (of about 200–400 nm in thickness). Due to the high electromagnetic field energy concentration in the structure, local values of intensity increase by more than two orders of magnitude in comparison to the intensity of the incident light, which also allows an increase in the amplitude of the pressure correspondingly. Thus, in this project, we propose the novel layered dielectric structures, in which the ...

中文翻译：

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分层介质中光声转换的电致伸缩机理的放大

在这项工作中，我们对光吸收率低的两种材料的界面上的光声能量转换的电致伸缩机理进行了分析。我们将这种转换方法与广泛使用的基于金属薄膜的热转换进行了比较。结果表明，在均质介质的情况下，电致伸缩机理的贡献显着降低。我们证明了通过激发导模来放大产生的声信号的可能性，为此，能量集中在薄的介电层（厚度约200-400 nm）中。由于结构中电磁场能量的高度集中，强度的局部值与入射光的强度相比增加了两个数量级以上，这也允许相应地增加压力的幅度。因此，在这个项目中，我们提出了新颖的分层介电结构，其中...