Journal
JOURNAL OF RAMAN SPECTROSCOPY
Volume 39, Issue 9, Pages 1127-1134Publisher
WILEY
DOI: 10.1002/jrs.1945
Keywords
SERS; enhancement factors; Surface selection rules; depolarization ratio; hot spots
Categories
Ask authors/readers for more resources
in this paper, we discuss some advanced theoretical aspects of electromagnetic enhancement factors (EFs) in surface-enhanced Raman scattering (SERS). We focus in particular on the influence of surface selection rules (SSRs) on SERS EFs at hot spots, and the determination of SERS depolarization ratios. Both aspects could be viewed as secondary (compared to the overall magnitude of the SERS EF), but are nevertheless observable experimentally and crucial for a fundamental understanding of SERS. They also share the property that they cannot be studied within the commonly used vertical bar E vertical bar(4) approximation to the SERS EFs, and appropriate tools are developed here to make predictions beyond this approximation in the case of a SERS hot spot. In addition, theoretical estimates of different types of (previously defined) EFs are provided, and their origins discussed for the typical example of a SERS substrate dominated by SERS hot spots. Finally, experimental measurements of SERS depolarization ratios are presented to support the theoretical predictions. Copyright (c) 2008 John Wiley & Sons, Ltd.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available