Using a Fabry-Perot Cavity to Augment the Enhancement Factor for Surface-Enhanced Raman Spectroscopy and Tip-Enhanced Raman Spectroscopy

被引：23

作者：

Guo, Yinsheng ^{[1
]}

Jiang, Song ^{[1
]}

Chen, Xu ^{[2
]}

Mattei, Michael ^{[1
]}

Dieringer, Jon A. ^{[1
]}

Ciraldo, John P. ^{[3
]}

Van Duyne, Richard P. ^{[1
,2
]}

机构：

[1] Northwestern Univ, Dept Chem, 2145 Sheridan Rd, Evanston, IL 60208 USA

[2] Northwestern Univ, Appl Phys Grad Program, Evanston, IL 60208 USA

[3] Northwestern Univ, Micro Nano Fabricat Facil NUFAB, Evanston, IL 60208 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2018年 / 122卷 / 26期

基金：

美国国家科学基金会;

关键词：

SCALE SPATIAL-RESOLUTION; SPONTANEOUS EMISSION; INTERFEROMETER; NANOANTENNAS; MOLECULES;

D O I：

10.1021/acs.jpcc.8b05253

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We propose the use of Fabry-Perot cavities as a means to augment the enhancement factor in surface-enhanced Raman spectroscopy (SERS) and tip-enhanced Raman spectroscopy (TERS) experiments by optical interference. Using both clean-room and bench-top fabrication approaches, we demonstrate that such a design can be readily realized and provides an additional 12X SERS enhancement and 5X TERS enhancement, in good agreement with expectations from electromagnetic modeling. The mechanism of optical interference enhancement is of far-field nature and is independent of the enhancement mechanisms relying on plasmonic and molecular resonances. Therefore, the Fabry-Perot cavity substrate can be applied generally without material and molecular limitations. The Fabry-Perot cavity structure provides enhancement at large incidence angles away from the surface normal, particularly suitable for low-light Raman measurements with side illumination.

引用

页码：14865 / 14871

页数：7

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