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Intense optical absorption of defects created in Er3+-diffused layer in MgO (5 mol%)-doped LiNbO3 crystal by local Er3+ diffusion under Li-poor atmosphere

Published online by Cambridge University Press:  26 April 2012

De-Long Zhang ,
Shi-Yu Xu ,
Fang Han ,
Ping-Rang Hua ,
Dao-Yin Yu  and
Edwin Yue-Bun Pun
De-Long Zhang*
Affiliation:
Department of Opto-electronics and Information Engineering, School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, People’s Republic of China; and Key Laboratory of Opto-electronic Information Technology, Tianjin University, Ministry of Education, Tianjin 300072, People’s Republic of China
Shi-Yu Xu
Affiliation:
Department of Opto-electronics and Information Engineering, School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, People’s Republic of China; and Key Laboratory of Opto-electronic Information Technology, Tianjin University, Ministry of Education, Tianjin 300072, People’s Republic of China
Fang Han
Affiliation:
Department of Opto-electronics and Information Engineering, School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, People’s Republic of China; and Key Laboratory of Opto-electronic Information Technology, Tianjin University, Ministry of Education, Tianjin 300072, People’s Republic of China
Ping-Rang Hua
Affiliation:
Department of Opto-electronics and Information Engineering, School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, People’s Republic of China; and Key Laboratory of Opto-electronic Information Technology, Tianjin University, Ministry of Education, Tianjin 300072, People’s Republic of China
Dao-Yin Yu
Affiliation:
Department of Opto-electronics and Information Engineering, School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, People’s Republic of China; and Key Laboratory of Opto-electronic Information Technology, Tianjin University, Ministry of Education, Tianjin 300072, People’s Republic of China
Edwin Yue-Bun Pun
Affiliation:
Department of Electronic Engineering, City University of Hong Kong, Kowloon, Hong Kong, People’s Republic of China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Intense broad absorption bands centered around 1.7, 2.5, 3.1, and 3.7 eV take place in Er3+-diffused layer formed near MgO (5 mol%)-doped LiNbO3 crystal surface by in-diffusion of Er metal under Li-poor atmosphere. These bands are tentatively attributed to the defect absorption of small polarons, bipolarons, F-centers, and Q-polarons created due to Er3+ in-diffusion and Li2O loss from the crystal. It is interesting that the number, type, area, and peaking position of the bands can be controlled by the diffusion temperature and further oxidation treatment. Such material is a promising medium for data storage based upon two-color holography.

Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 11 , 14 June 2012 , pp. 1482 - 1487
Copyright
Copyright © Materials Research Society 2012

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