期刊
JOURNAL OF LUMINESCENCE
卷 181, 期 -, 页码 44-48出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2016.09.002
关键词
Random laser; Neodymium ions; Bichromatic emission; Optical thermometry
类别
资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico, Brazil (CNPq)
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior, Brazil (CAPES)
- Fundacao de Amparo a Ciencia e Tecnologia do Estado de Pernambuco, Brazil (FACEPE)
- Fundacao de Amparo a Pesquisa do Estado de Goias, Brazil (FAPEG)
- CAPES
- National Institute of Photonics (INCT de Fotonica), Brazil
- PRONEX Center of Excellence Program
Two-color random laser (RL) emission is demonstrated for the first time in a neodymium (Nd3+) doped nanocrystalline powder. Emissions at 1063.5 and 1065.1 nm, due to the Nd3+ transition F-4(3/2) -> I-4(11/2) in NdAl3(BO3)(4) nanocrystals, were observed by exciting the powder in resonance with the Nd3+ transition I-4(9/2) -> F-4(5/2), at 811 nm. The dual-wavelength emission is attributed to the radiative decay from two nonequivalent site-symmetries occupied by the Nd3+ in the NdAl3(BO3)(4) crystalline structure. The behavior of the Nd3+ emissions versus the samples' temperature indicates the possibility of the RL application as a near infrared optical sensor with a large thermal sensitivity of 0.020 degrees C-1. (C) 2016 Elsevier B.V. All rights reserved.
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