Ultrafast spectroscopy: degenerated and non-degenerated pump-probe resolved in polarization

• Grant number: 20/16036-8
• Support Opportunities: Scholarships in Brazil - Master
• Start date: April 01, 2021
• End date: September 01, 2023
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Leonardo de Boni
• Grantee: Rafael de Queiroz Garcia
• Host Institution: Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Associated research grant: 18/11283-7 - Nonlinear photonics: spectroscopy and advanced processing of materials, AP.TEM
• Associated scholarship(s): 22/02439-9 - Ultrafast coherent spectroscopy in the sub-100 fs regime, BE.EP.MS

Abstract

The research that will be developed in this project is related to the development and automation of an experimental apparatus of ultrafast spectroscopy, which will be used in the future for studies of ultrafast temporal dynamics in organic molecules and inorganic compounds, for example nanocrystals and glasses. The main objective will be the assembly of the degenerated and non-degenerated pump-probe technique with a temporal resolution of around 200 femtoseconds. In addition, the technique will cover a wide spectral range from UV to infrared. This will be resolved in polarization, with the possibility of controlling the polarization of the excitation beam in the different possible polarizations. This technique will aim, in the short term, to study the population dynamics of organic compounds that present light-induced photoisomerization processes, which have a relaxation of the excited state for the fundamental states mediated by a conical intersection process. These processes occur on the picosecond time scale and are highly dependent on the excitation energy.The aspects of this project are extremely current and of great importance for basic and applied sciences, since the characterization of organic and inorganic materials can bring information about excited electronic states and how they behave when interacting with optical fields with different polarizations and not degenerate. (AU)

Scientific publications

(4)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

COCCA, LEANDRO ZUCOLOTTO H.; PELOSI, ANDRE GASPAROTTO; ABEGAO, LUIS M. G.; GARCIA, RAFAEL DE Q.; MULATIER, JEAN-CHRISTOPHE; PITRAT, DELPHINE; BARSU, CYRILLE; ANDRAUD, CHANTAL; MENDONCA, CLEBER R.; VIVAS, MARCELO G.; et al. Unveiling the molecular structure and two-photon absorption properties relationship of branched oligofluorenes. Physical Chemistry Chemical Physics, v. 25, n. 6, p. 8-pg., 2023-01-13. (18/11283-7, 16/20886-1, 20/16036-8, 22/06561-3)

MARTINS DA COSTA, RAFAELA GOMES; GARCIA, RAFAEL DE QUEIROZ; FIUZA, RAQUEL MAZZOLI DA R.; MAQUEIRA, LUIS; PAZINI, ALESSANDRA; DE BONI, LEONARDO; LIMBERGER, JONES. Synthesis, photophysical properties and aggregation-induced enhanced emission of bischalcone-benzothiadiazole and chalcone-benzothiadiazole hybrids. Journal of Luminescence, v. 239, NOV 2021. (18/03758-5, 16/20886-1, 20/16036-8)

TISOCO, ISADORA; KOHLER, MATEUS H.; NOGARA, PABLO A.; ROCHA, JOAO B. T.; DO NASCIMENTO, CAROLINA S.; GARCIA, RAFAEL DE Q.; DE BONI, LEONARDO; IGLESIAS, BERNARDO A.. Study on the photophysical property of meso-tetra(2-fluorenyl)porphyrin derivatives and their interactions with DNA/HSA biomacromolecules. Inorganica Chimica Acta, v. 556, p. 13-pg., 2023-06-17. (20/16036-8, 22/02439-9, 16/20886-1, 18/11283-7, 18/03758-5, 22/06561-3, 22/06528-6)

RODRIGUES, BRUNA M.; VICTORIA, HENRIQUE F. V.; LEITE, GUILHERME; KRAMBROCK, KLAUS; CHAVES, OTAVIO A.; OLIVEIRA, DIEGO F. DE; GARCIA, RAFAEL DE Q.; DE BONI, LEONARDO; COSTA, LUIZ A. S.; IGLESIAS, BERNARDO A.. Photophysical, photobiological, and biomolecule-binding properties of new tri-cationic meso-tri(2-thienyl)corroles with Pt(II) and Pd(II) polypyridyl derivatives. Journal of Inorganic Biochemistry, v. 242, p. 16-pg., 2023-02-11. (20/16036-8, 22/02439-9, 16/20886-1, 18/11283-7, 18/03758-5, 21/07350-3)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

GARCIA, Rafael de Queiroz. Ultrafast pump-probe platform for broadband and polarization-resolved characterization of materials: case study of octupolar push-pull azobenzenes. 2023. Master's Dissertation - Universidade de São Paulo (USP). Instituto de Física de São Carlos (IFSC/BT) São Carlos.