Brolo Alexandre G, Arctander Erin, Addison Christopher J
Department of Chemistry, University of Victoria, P.O. Box 3065, Victoria, BC, Canada V8W 3V6.
J Phys Chem B. 2005 Jan 13;109(1):401-5. doi: 10.1021/jp046045u.
Random parallel nanostructures (ridges and channels) were created by scratching gold thin films deposited on glass slides. Atomic force microscope (AFM) images showed that the width of the substructures within the scratches were of the order of a few hundred nanometers. These nanometric gold features can then support localized surface plasmon resonances in the direction perpendicular to the propagation of the scratches. This surface plasmon excitation led to a remarkable dependence of the intensity of the surface-enhanced resonance Raman scattering (SERRS) on the polarization direction of the incident light relative to the orientation of the scratch. The maximum SERRS intensities for oxazine 720 (a common laser dye) adsorbed on these nanostructures were obtained when the polarization of the light field was perpendicular to the direction of the substructures. The SERRS intensities followed a squared dependence on the polarization direction of the incident field.
通过刮擦沉积在载玻片上的金薄膜，制备出随机平行的纳米结构（脊和沟道）。原子力显微镜（AFM）图像显示，划痕内子结构的宽度为几百纳米量级。这些纳米级金特征随后可在垂直于划痕传播方向上支持局域表面等离子体共振。这种表面等离子体激发导致表面增强共振拉曼散射（SERRS）强度对入射光相对于划痕取向的偏振方向具有显著依赖性。当光场偏振垂直于子结构方向时，获得了吸附在这些纳米结构上的恶嗪720（一种常见激光染料）的最大SERRS强度。SERRS强度与入射场的偏振方向呈平方依赖关系。
