title: Differential laser-induced perturbation spectroscopy using a deep-ultraviolet excimer laser.
abstract: Here we demonstrate a unique optical sensing scheme based on deep-UV photochemical perturbation in combination with difference spectroscopy. Applying a sequence of optical probing, UV-laser-induced perturbation, and repeat optical probing coupled with difference spectroscopy provides a new spectral signature. We show a selective (sevenfold difference) optical response using a fluorescence probe for binary mixtures of organic dyes, and generate complementary spectral information derived from Raman scattering of the dipeptide glycine-glycine. We further extend the methodology to fluorescence-based imaging of an organic matrix.
authors.affiliation: Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida 32611, USA.
authors.forename: Sarah E
authors.initials: SE
authors.lastname: Smith
authors.forename: Leia M
authors.initials: LM
authors.lastname: Shanyfelt
authors.forename: Katherine D
authors.initials: KD
authors.lastname: Buchanan
authors.forename: David W
authors.initials: DW
authors.lastname: Hahn