Non-Uniqueness of Parameters Extracted from Resonant Second-Order Nonlinear Optical Spectroscopies
Year: 2009
Type: article
Abstract: Experimental data from second-order nonlinear optical spectroscopies (SFG, DFG, and SHG) provide parameters relevant to the physical chemistry of interfaces and thin films. We show that there are in general 2 N or 2 N-1 equivalent sets of parameters to fit an experimental curve comprising N resonant features, of vibrational or electronic origin for example. We provide the algorithm to calculate these sets, among which the most appropriate has to be selected. The main consequences deal with the existence of “ghost resonances”, the need of a critical analysis of fit results, and the procedure to search for better sets of parameters coherent with applied constraints.
DOI: 10.1021/jp908240d
Authors: Bertrand Busson, Abderrahmane Tadjeddine
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2022526044