Effects of swift argon-ion irradiation on the proton-exchanged LiNbO3 crystal

doi:10.1088/1674-1056/21/5/056103

Abstract A proton-exchanged LiNbO₃ crystal was subjected to 70-MeV argon-ion irradiation. The lattice damage was investigated by the Rutherford backscattering and channeling technique. It was found that the lattice disorder induced by the proton exchange process was partially recovered and the proton-exchanged layer was broadened. It indicated that the lithium ions underneath the initial proton-exchanged layer migrated to the surface during the swift argon-ion irradiation and supplemented the lack of lithium ions in the initial proton-exchanged layer. This effect was ascribed to the great electronic energy deposition and relaxation. The swift argon-ion irradiation induced an increase in extraordinary refractive index and formed another waveguide structure beneath the proton-exchanged waveguide.

Keywords: swift heavy ion lithium niobate optical waveguide

Received: 23 November 2011
Revised: 27 April 2012
Accepted manuscript online:

PACS:	61.80.Jh	(Ion radiation effects)
	42.79.Gn	(Optical waveguides and couplers)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10975094), the National Basic Research Program of China (Grant No. 2010CB832906), the Foundation for the Author of National Excellent Doctoral Dissertation of China, the Independent Innovation Foundation of Shandong University and the National Laboratory for the heavy Ion Research Facility in Lanzhou, China

Cite this article:

Huang Qing(黄庆), Liu Peng(刘鹏), Liu Tao(刘涛), Guo Sha-Sha(郭沙沙), and Wang Xue-Lin(王雪林) Effects of swift argon-ion irradiation on the proton-exchanged LiNbO₃ crystal 2012 Chin. Phys. B 21 056103

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Effects of swift argon-ion irradiation on the proton-exchanged LiNbO3 crystal

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Effects of swift argon-ion irradiation on the proton-exchanged LiNbO₃ crystal