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Nonlinear N2 spectroscopy in ion doped solids

Grant number: 12/19338-9
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): June 01, 2013
Effective date (End): May 31, 2015
Field of knowledge:Physical Sciences and Mathematics - Physics
Principal Investigator:Tomaz Catunda
Grantee:Kesavulu Culala Rajasekharaudayar
Home Institution: Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil


The main purpose of this project is the study of nonlinear refractive index (n2) spectroscopy in resonance with absorption lines of solids doped with rare earths, using the technique of Z-scan time-resolved, in the single-beam and dual beam (two colors) configurations. These experiments were previously performed only in ruby, alexandrite (both crystals doped with Cr3 +) and Nd: YAG (see ref.6). In this project, we intend to study the ion Nd3 + in various matrices (crystals and glasses), varying the temperature (8K, 77K and 300K) and examine a possible relationship between n2 and the Judd-Ofelt parameters. The candidate has recently completed his PhD on spectroscopy of rare earth doped glasses, with 8 published papers.

Scientific publications
(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)
KESAVULU, C. R.; BASAVAPOORNIMA, CH.; VISWANATH, C. S. DWARAKA; JAYASANKAR, C. K. Structural and NIR to visible upconversion properties of Er3+-doped LaPO4 phosphors. Journal of Luminescence, v. 171, p. 51-57, MAR 2016. Web of Science Citations: 19.
KESAVULU, C. R.; ALMEIDA SILVA, ANIELLE CHRISTINE; DOUSTI, M. R.; DANTAS, NOELIO OLIVEIRA; DE CAMARGO, A. S. S.; CATUNDA, TOMAZ. Concentration effect on the spectroscopic behavior of Tb3+ ions in zinc phosphate glasses. Journal of Luminescence, v. 165, p. 77-84, SEP 2015. Web of Science Citations: 35.

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