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Vega M, Bryche JF, Karsenti PL, Gogol P, Canva M, Charette PG. Two-dimensional filtering in the Fourier domain of transient grating coherent artifacts in time-resolved spectroscopy. Anal Chim Acta 2023; 1279:341820. [PMID: 37827642 DOI: 10.1016/j.aca.2023.341820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 07/26/2023] [Accepted: 09/12/2023] [Indexed: 10/14/2023]
Abstract
Removal of coherent artifacts is important in the analysis of time and wavelength resolved spectroscopy data. By taking advantage of the strong correlation between spectra acquired sequentially in time, artifact removal can be formulated as a 2D problem for improved effectiveness. This paper proposes a 2D method to remove transient grating coherent artifacts from femtosecond time-resolved spectroscopy data based on filtering in the Fourier domain, leading to better estimation of the material parameters from the measured data. The method is simple, intuitive, and light on computation resources. The effectiveness of the method is demonstrated with experimental data acquired from a bare gold film with and without coherent artifacts using mutually parallel and perpendicular pump/probe polarizations, as well as with more complex samples (nanostructured gold film on a glass substrate and rhodamine fluorophores in solution). The proposed method is expected to be applicable to coherent artifact removal in other types of time and wavelength-resolved spectroscopy data.
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Affiliation(s)
- M Vega
- Laboratoire Nanotechnologies Nanosystèmes (LN2), CNRS, Université de Sherbrooke, Sherbrooke, QC, Canada; Université Paris-Saclay, Institut d'Optique Graduate School, CNRS, Laboratoire Charles Fabry, Palaiseau, France; Institut Interdisciplinaire d'Innovation Technologique (3IT), Université de Sherbrooke, Sherbrooke, QC, Canada
| | - J-F Bryche
- Laboratoire Nanotechnologies Nanosystèmes (LN2), CNRS, Université de Sherbrooke, Sherbrooke, QC, Canada; Institut Interdisciplinaire d'Innovation Technologique (3IT), Université de Sherbrooke, Sherbrooke, QC, Canada; Faculté des Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada.
| | - P-L Karsenti
- Faculté des Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - P Gogol
- Laboratoire Nanotechnologies Nanosystèmes (LN2), CNRS, Université de Sherbrooke, Sherbrooke, QC, Canada; Institut Interdisciplinaire d'Innovation Technologique (3IT), Université de Sherbrooke, Sherbrooke, QC, Canada; Centre de Nanosciences et de Nanotechnologies, Université Paris-Saclay, CNRS, Palaiseau, France
| | - M Canva
- Laboratoire Nanotechnologies Nanosystèmes (LN2), CNRS, Université de Sherbrooke, Sherbrooke, QC, Canada; Institut Interdisciplinaire d'Innovation Technologique (3IT), Université de Sherbrooke, Sherbrooke, QC, Canada
| | - P G Charette
- Laboratoire Nanotechnologies Nanosystèmes (LN2), CNRS, Université de Sherbrooke, Sherbrooke, QC, Canada; Institut Interdisciplinaire d'Innovation Technologique (3IT), Université de Sherbrooke, Sherbrooke, QC, Canada
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