金属尖端角度对表面增强拉曼散射的影响

J4 ›› 2017, Vol. 34 ›› Issue (4): 385-389.

• 光谱 • 下一篇

金属尖端角度对表面增强拉曼散射的影响

崔辰静¹,李宽国¹,戴艳秋¹,鲁拥华²,王沛³

1. 中国科学技术大学物理学院光学与光学工程系光电子科学与技术重点实验室
2. 中国科学技术大学
3. 中国科学技术大学光学与光学工程系

收稿日期:2016-03-30 修回日期:2016-05-06 出版日期:2017-07-28 发布日期:2017-08-29

Study on Surface Enhanced Raman Scattering (SERS) depending on metal tip angle

Received:2016-03-30 Revised:2016-05-06 Published:2017-07-28 Online:2017-08-29

摘要/Abstract

摘要： 金属尖端对于表面拉曼散射有增强的效果，但尖端的尖锐程度对于表面增强拉曼散射(Surface-Enhanced Raman Scattering, SERS)的影响很少有定量的报道。为了研究角度大小与SERS的关系，需要制备具有不同角度的结构。利用数字微镜设备（Digital Micro mirror Device, DMD）进行光学投影光刻制备了四组样品，分别具有30°60°90°120°角金属微结构，测量了这些结构对应的SERS谱，研究金属尖端角度大小对于SERS的影响。研究发现，锐角具有更好的表面增强拉曼散射效果，而且增强效果对角度依赖强烈，角度越小增强效果越明显；钝角情况下，SERS对于角度大小依赖的敏感度下降。

关键词: 数字微镜设备、光刻、表面增强拉曼散射

Abstract: Raman scattering can be enhanced by metal taper, but quantitative relationship between SERS and taper’s angle is seldom reported. To get this quantitative relationship, we fabricated a series of different angled tapers. Four kinds of samples with different angles, including 30°60°90°120°, were fabricated by maskless projective lithography using Digital Micro mirror Device (DMD). Surface enhanced Raman spectrum of all these samples were measured and analyzed. We concluded that the smaller angle, the more enhancement of SERS and the enhancement was sensitive to the angle for acute angles but almost constant for angles greater than 90 degrees.

Key words: DMD, light lithography, SERS

中图分类号:

O433.1

崔辰静李宽国戴艳秋鲁拥华王沛. 金属尖端角度对表面增强拉曼散射的影响[J]. J4, 2017, 34(4): 385-389.

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金属尖端角度对表面增强拉曼散射的影响

Study on Surface Enhanced Raman Scattering (SERS) depending on metal tip angle

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