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Study of nonlinear refraction in ion doped solids

Grant number: 12/01173-3
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): March 01, 2012
Effective date (End): July 26, 2015
Field of knowledge:Physical Sciences and Mathematics - Physics - Condensed Matter Physics
Principal Investigator:Tomaz Catunda
Grantee:Yves Maia Auad
Host Institution: Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Associated scholarship(s):12/24088-1 - Internship at Univ. de Caen to study excited state absorption in solids doped with rare earth ions, BE.EP.IC


This project aims the improvement of the Z-scan technique applied to the determination of nonlinear refractive index, n2, of laser materials. This n2 effect appears due to the difference in polarizability (D a) of fundamental and excited states of the dopant ions (usually transition metals or rare earth). In implementing these measures, we will use the time-resolved Z-scan technique. In this project we propose some improvements in experimental methodology to improve the temporal resolution of the measurement and make measurements at low temperatures (using a cryostat). (AU)

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