Improved Infrared Emissions of Er3+-Tm3+ Co-Doped Al2O3 Thin Films : The Role of Cross Relaxation Among Rare Earth Ions

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Anping Huang
  • Jinliang Wang

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)10673-10676
Journal / PublicationJournal of Nanoscience and Nanotechnology
Volume11
Issue number12
Online published1 Dec 2011
Publication statusPublished - Dec 2011

Conference

Title3rd IEEE International NanoElectronics Conference (INEC)/Symposium on Nanoscience and Nanotechnology in China
PlaceHong Kong
Period3 - 8 January 2010

Abstract

We report the infrared emissions of Er3+-Tm3+ co-doped amorphous Al2O3 thin films pumped at 791 nm by a Ti:sapphire laser. The as-deposited films were annealed to improve the photoluminescence performance. Three cross relaxation channels among Er3+-Tm3+ and Tm3+-Tm3+ ions incorporated in the films were investigated as annealing temperature increases especially from 800 to 850 °C. In order to understand the Stark effect and cross relaxations, the photoluminescence spectra were deconvoluted by Gaussian fittings. Our results indicate that the luminescence intensity of 1.62 μm in comparison to 1.5 μm can be enhanced by the cross relaxation process [Er3+(4I13/2)+Tm3+(3H6) -> Er3+(4I15/2)+Tm3+1(3F4], and the longer-wavelength side of Er3+ emission can be improved by the CR process [Er3+(4I15/2)+Tm3+(3H4) -> Er3+ (4I13/2)+Tm3+(3F4)] at expense of the Tm3+ 1.47 μm emission which is also maybe quenched by the CR effect between themselves. These results suggest one possible approach to achieve broadband infrared emissions at the wavelength region of 1.45-1.65 μm from the Er3+-Tm3+ co-doped systems.

Research Area(s)

  • Er3+-Tm3+: Al2O3 Thin Films, Infrared Emission, Cross Relaxation, Annealing, OPTICAL AMPLIFICATION, ALUMINATE GLASS, TM3+ IONS, BAND, PHOTOLUMINESCENCE, FIBER, LASER, NM

Citation Format(s)

Improved Infrared Emissions of Er3+-Tm3+ Co-Doped Al2O3 Thin Films : The Role of Cross Relaxation Among Rare Earth Ions. / Zhou, Bo; Xiao, Zhisong; Yan, Lu; Zhu, Fang; Zhang, Feng; Huang, Anping; Wang, Jinliang.

In: Journal of Nanoscience and Nanotechnology, Vol. 11, No. 12, 12.2011, p. 10673-10676.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review