Controlling the polarization state of rare-earth emissions in tellurite glasses from plasmonic nanostructures

• Grant number: 22/05478-5
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Start date: November 01, 2022
• End date: July 31, 2023
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Euclydes Marega Junior
• Grantee: Gaston Lozano Calderón
• Supervisor: Younes Messaddeq
• Host Institution: Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Institution abroad: Université Laval, Canada
• Associated to the scholarship: 20/04835-3 - Controlling the polarization state of rare earth emissions in tellurite glasses from plasmonic nano antennas, BP.DR

Abstract

This proposal refers to a collaborative work that involves the Centre d'optique, photonique et laser (COPL) of the Université Laval in Canada. It has a scientific research character with potential technological applications in nano-photonics. The polarization control in the infrared region of the emission of Er3+, Yb3+ and Pr3+ ions doped in a tellurite glass matrix is the basis for a wide of applications. This control may be possible using plasmonic nanostructures fabricated in metallic films such as gold and silver. In addition, to increase the local electric field in the regions close to the nanostructure (metal/substrate interface), nanostructures in the shape of nano-cavities are capable of enhancing some modes and generating extraordinary optical transmission of light. The control of the light polarization is obtained via modifications of the geometry of these nanostructures. In this project, bull's eyes nanostructures fabricated in gold films will provide us control of the light polarization states, besides generate an intense and well-focused light transmission. The samples are based on tellurite glasses, and visible to near-infrared emission will be studied. The mechanisms responsible for this control are still being studied and are giving rise to new concepts and effects in quantum plasmonics. Therefore, polarization control has a quantum optics approach, using the Stokes formalism for light polarization states. Furthermore, the interaction of rare-earth ions and plasmonic nanostructures will provide a better understanding of the coupling mechanisms between quantum emitters and the plasmon. (AU)

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)

LOZANO, G. C.; CHACALIAZA-RICALDI, J.; CLABEL, J. L. H.; MESSADDEQ, Y.; RIVERA, V. A. G.; MAREGA JR, E.. Improving emission performance and bandwidth broadening of the Er3+-doped tellurite-tungsten glasses at 1.5 mu m via Pr3+ions. Journal of Luminescence, v. 260, p. 7-pg., 2023-04-13. (13/07276-1, 20/04835-3, 22/05478-5)

LOZANO, C. G.; RIVERA, V. A. G.; MESSADDEQ, Y.; MAREGA, E.. Thermometry and optical study of Er3+-Yb3+doped tellurite glasses as a suitable candidate for optical fibre. Journal of Alloys and Compounds, v. 948, p. 9-pg., 2023-03-27. (13/07276-1, 20/04835-3, 22/05478-5)

CHACALIAZA-RICALDI, J.; LOZANO, C. G.; CLABEL, H. J. L.; FERRI, F. A.; RODRIGUES, A. D.; MESSADDEQ, Y.; RIVERA, V. A. G.; MAREGA, E.. Influence of Pr3+ions on the structural properties of Er3+-doped tellurite-tungsten glasses. Journal of Non-Crystalline Solids, v. 616, p. 8-pg., 2023-07-07. (21/11484-5, 13/07276-1, 22/05478-5, 21/13974-0)