Enhancement and extinction effects in surface-enhanced stimulated Raman spectroscopy

Surface-enhanced Raman spectroscopy (SERS) is a technique that allows one to probe the vibrational modes of molecules with great precision. However, current methods involve the enhancement of local fields from spontaneous Raman scattering near a metallic substrate. By utilizing stimulated Raman scattering over spontaneous Raman scattering, the effect of the enhancement of the local fields will be increased due to nonlinear excitations. An electromagnetic derivation for the enhancement of local fields near the surface of a small metallic sphere due to stimulated Raman scattering is performed. In addition, the non-trivial relationship between the enhancement and extinction of the Raman signal is considered. Using the effective medium approach, an expression for the scattered Raman field of a collection of metallic nanoparticles that includes both these effects is formulated. Optimal parameters for surface-enhanced stimulated Raman spectroscopy (SESRS) are proposed based on the study of enhancement and extinction phenomena in the collection of nanoparticles.

Name thesis:degree_name

M.S.

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Electrical & Computer Engr

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Chng, Xiong Kai Benjamin

Contributors dc:contributor

• Carney, Paul S.

• surface-enhanced stimulated Raman spectroscopy
• nonlinear optics

Statement dc:rights

• Copyright 2015 Xiong Kai Benjamin Chng

Handle dc:identifier

http://hdl.handle.net/2142/78312

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/78312