Optical properties and size distribution of the nanocolloids made of rare-earth ion-doped NaYF4

Darayas N. Patel; Ashley Lewis; Donald Wright III; Danielle Lewis; Rueben Valentine; Maucus Valentine; Dennis Wessley; Sergey Sarkisov; Abdalla M. Darwish

doi:10.1117/12.2077680

16 March 2015 Optical properties and size distribution of the nanocolloids made of rare-earth ion-doped NaYF₄

Darayas N. Patel, Ashley Lewis, Donald Wright III, Danielle Lewis, Rueben Valentine, Maucus Valentine, Dennis Wessley, Sergey Sarkisov, Abdalla M. Darwish

Author Affiliations +

Proceedings Volume 9359, Optical Components and Materials XII; 93591L (2015) https://doi.org/10.1117/12.2077680
Event: SPIE OPTO, 2015, San Francisco, California, United States

Abstract

In this paper we investigate optical properties and size distribution of the nano-colloids made of trivalent rare-earth ion doped fluorides: holmium and ytterbium, thulium and ytterbium, and erbium and ytterbium co-doped NaYF₄. These materials were synthesized by using simple co-precipitation synthetic method. The initially prepared micro-crystals had very weak or no visible upconversion fluorescence signals when being pumped with a 980-nm laser. The fluorescence intensity significantly increased after the crystals were annealed at a temperature of 400°C - 600°C undergoing the transition from cubic alpha to hexagonal beta phase of the fluoride host. Nano-colloids of the crystals were made in polar solvents using the laser ablation and ball milling methods. Size analyses of the prepared nano-colloids were conducted using a dynamic light scatterometer and atomic force microscope. The nano-colloids were filled in holey PCFs and their fluorescent properties were studied and the feasibility of new a type of fiber amplifier/laser was evaluated.

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Darayas N. Patel, Ashley Lewis, Donald Wright III, Danielle Lewis, Rueben Valentine, Maucus Valentine, Dennis Wessley, Sergey Sarkisov, and Abdalla M. Darwish "Optical properties and size distribution of the nanocolloids made of rare-earth ion-doped NaYF₄", Proc. SPIE 9359, Optical Components and Materials XII, 93591L (16 March 2015); https://doi.org/10.1117/12.2077680

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