CNR ExploRA

Contributo in atti di convegno, 2022, ENG, 10.1117/12.2620624

Photon management in SiO2-SnO2:Yb3+ hybrid 1D microcavity

Thi Ngoc Lam Tran, Anna Szczurek, Alice Carlotto, Alessandro Cian, Stefano Varas, Erica Iacob, Gloria Ischia, Osman Sayginer, Simone Berneschi, Gualtiero Nunzi Conti, Rolindes Balda, Joaquin Fernandez, Giancarlo C. Righini, Monica Bollani, Francesco Scotognella, Daniele Zonta, Oreste Bursi, Pawel Gluchowski, Anna Lukowiak, Maurizio Ferrari, Alessandro Chiasera

CNR-Istituto di Fotonica e Nanotecnologie (Italy); Politecnico di Milano (Italy); Ho Chi Minh City Univ. of Technology and Education (Vietnam); IFN-CNR CSMFO Lab., IFN-CNR Milano (Italy); Fondazione Bruno Kessler, Sensors and Devices, Micro Nano Facility (Italy); Fondazione Bruno Kessler (Italy); Univ. degli Studi di Trento (Italy); Technische Universität München (Germany); Istituto di Fisica Applicata "Nello Carrara" (Italy); Univ. del País Vasco UPV-EHU (Spain); Donostia International Physics Ctr. (Spain); Ctr. for Nano Science and Technology, Istituto Italiano di Tecnologia (Italy); Univ. of Trento (Italy); Institute of Low Temperature and Structure Research (Poland)

In this work, we present preliminary results of the fabrication and characterization of 1D Fabry-Perot microcavity realized on Yb3+ activated SiO2-SnO2 glass-ceramic (SiO2-SnO2:Yb3+). A radiofrequency-sputtering/sol-gel hybrid deposition process was developed for the microcavity fabrication. The fabrication included (i) radiofrequency-sputtering (rf-sputtering) of SiO2/HfO2 Bragg reflectors and (ii) sol-gel deposition of the active SiO2-SnO2:Yb3+ defect layer. A good control and enhancement of the spontaneous emission for Yb3+ luminescence sensitized by SnO2 nanocrystals was achieved exploiting microcavity properties. Such results are valuable for development of low-threshold rare-earth-based coherent light sources, pumped by broadband UV diodes.

SPIE Photonics Europe, 2022, Strasbourg, France, 3 - 7 April 2022