中文摘要：

双层的金属性的栅栏(DMG ) 结构作为散布的提高表面的拉曼(重量的单位) ，底层作为探查 analyte 用 benzenethiol 被学习。DMG 结构由一个 SiO2 栅栏和 100-nm-thick 金牌涂层层组成。105 的一个改进因素被从 165 ～ 550 nm 在范围以内优化 SiO2 栅栏高度完成。SiO2 栅栏高度上的改进因素依赖由于表面电浆子刺激，它依赖于事件光的极化，并且由有限差别时间领域模拟证实。这研究为重量的单位应用在 DMG 结构表明高一致性，重制度和敏感的优点。

英文摘要：

Dual-layer Metallic grating （DMG） structures as surface-enhanced Raman scattering （SERS） substrates are studied using benzenethiol as the probe analyte. The DMG structure consists of a SiO2 grating and 100-nm-thick gold coating layers. An enhancement factor of 105 is achieved by optimizing the SiO2 grating height within the range from 165 to 550 nm. The enhancement factor dependence on the SiO2 grating height is due to the surface plasmon excitation, which is dependent on the polarization of the incident light, and confirmed by finite difference time domain simulations. This study demonstrates the advantages of high uniformity, reproducibility and sensitivity in the DMG structures for SERS applications.