Photon avalanche upconversion in Ho3+-Yb3+ co-doped transparent oxyfluoride glass-ceramics

被引：21

作者：

Babu, P. ^{[1
]}

Martin, I. R. ^{[2
,3
]}

Krishnaiah, K. Venkata ^{[4
]}

Seo, Hyo Jin ^{[5
]}

Venkatramu, V. ^{[6
]}

Jayasankar, C. K. ^{[4
]}

Lavin, V. ^{[2
,3
]}

机构：

[1] Govt Degree Coll, Dept Phys, Satyaveedu 517588, India

[2] Univ Laguna, Dept Fis Fundamental Expt, Dept Fis Fundamental & Expt Elect Sistemas, E-38200 Santa Cruz de La Palma, Spain

[3] Univ Laguna, MALTA Consolider Team, Dept Fis Fundamental & Expt Elect Sistemas, E-38200 Santa Cruz de La Palma, Spain

[4] Sri Venkateswara Univ, Dept Phys, Tirupati 517502, Andhra Pradesh, India

[5] Pukyong Natl Univ, Dept Phys, Pusan 608737, South Korea

[6] Yogi Vemana Univ, Dept Phys, Kadapa 516003, India

来源：

CHEMICAL PHYSICS LETTERS | 2014年 / 600卷

基金：

新加坡国家研究基金会;

关键词：

ROOM-TEMPERATURE; EMISSION; HO3+; NANOCRYSTALS;

D O I：

10.1016/j.cplett.2014.03.048

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The Ho3+-Yb3+ co-doped transparent glass and glass-ceramics containing CaF2 nanocrystals have been prepared. Differential thermal analysis and X-ray diffraction measurements have been made to characterize thermal properties of glass and structural changes in glass-ceramics, respectively. Photon avalanche upconversion has been achieved by exciting the samples at 745 nm at room temperature. An intense green and a weak red upconverted emissions corresponding to the S-5(2):F-5(4) -> I-5(8) and F-5(5) -> I-5(8) transitions, respectively, have been observed. The upconversion intensity has been found to increase with the increase in the size of the fluoride nanocrystals in glass-ceramics. Experimental evidences confirm that the mechanism of upconversion is photon avalanche. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：34 / 37

页数：4

共 13 条

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CHIVIAN JS, 1979, APPL PHYS LETT, V35, P124, DOI 10.1063/1.91044

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