拉曼散射
表面等离子共振
材料科学
等离子体子
折射率
电场
灵敏度(控制系统)
表面等离子体子
共振(粒子物理)
光电子学
光学
散射
拉曼光谱
光散射
纳米技术
物理
纳米颗粒
工程类
量子力学
电子工程
粒子物理学
作者
Xuan Dou,Pei-Yu Chung,Peng Jiang,Jianli Dai
摘要
We report the simultaneous achievement of sensitive surface plasmon resonance (SPR) and surface-enhanced Raman scattering (SERS) sensing using digital versatile discs (DVDs). The aluminum-covered data tracks of DVDs can efficiently concentrate local electromagnetic field, resulting in an excellent SPR medium (with sensitivity of ∼850 nm per refractive index unit which is higher than that of most available nanofabricated plasmonic substrates) with a small but measurable SERS enhancement. The SPR sensitivity and the optical spectra, as well as the distribution of electric field amplitude, are simulated using a finite-difference time-domain model. The theoretical predictions agree reasonably well with the experimental results.
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