摘要
本文通过数值模拟研究了金-介质-银结构的双金属拉曼基底.与金构成的单金属拉曼基底相比,拉曼增强因子提高了89%.与以银为基础的单金属基底相比,该基底不仅可以避免银氧化带来的不利影响,而且可以利用金在可见光波段的损耗,将高阶共振造成的场增强抑制为原来的60%.这一研究对于研制选择性高、可靠性强的新型拉曼基底具有参考价值.
A dual-metal substrate of gold-dielectric-silver for Surface Enhanced Raman Scattering（SRES）is studied through numerical simulations. The calculations show that the enhancement of SERS can be improved by 89% compared with the single-metal substrate based on gold. Compared with the single-metal substrate of silver,this substrate is immune to oxygenations,and the local field enhancement from high order resonance is decreased to 60% due to the loss of gold at the visible wave range. These results will be helpful for the study on SERS substrates of high selectivity and reliability.
出处
《南京师大学报（自然科学版）》
CAS
CSCD
北大核心
2016年第1期53-56,共4页
Journal of Nanjing Normal University(Natural Science Edition)
基金
江苏省高校自然科学研究项目(14KJB510016)
