Surface nanostructuring of LiNbO3 by high-density electronic excitations

被引：14
作者：
El-Said, A. S. [1 ,2 ,3 ]
Wilhelm, R. A. [1 ,6 ]
Facsko, S. [1 ]
Trautmann, C. [4 ,5 ]
机构：
[1] Helmholtz Zentrum Dresden Rossendorf HZDR, Inst Ion Beam Phys & Mat Res, D-01328 Dresden, Germany
[2] King Fahd Univ Petr & Minerals, Dept Phys, Dhahran 31261, Saudi Arabia
[3] Mansoura Univ, Fac Sci, Dept Phys, Nucl & Radiat Phys Lab, Mansoura 35516, Egypt
[4] GSI Helmholtz Ctr Heavy Ion Res, D-64291 Darmstadt, Germany
[5] Tech Univ Darmstadt, D-64289 Darmstadt, Germany
[6] Tech Univ Dresden, D-01062 Dresden, Germany
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2013年 / 315卷
关键词：
Ion-surface interaction; Swift heavy ions; Highly charged ions; Energy loss; CHARGED IONS; HEAVY-IONS; SLOW; IRRADIATION; INSULATORS; CREATION;
D O I：
10.1016/j.nimb.2013.03.008
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Lithium niobate (LiNbO3) single crystals were irradiated with high energy gold ions (0.5-2.2 GeV) at the UNILAC (GSI) and with 150-key highly charged xenon ions from an EBIT (Electron Beam Ion Trap, HZDR). The surfaces of the irradiated crystals were analyzed by scanning force microscopy showing very similar topographic changes. Swift heavy ions and slow highly charged ions produce hillock-like nanostructures on the surface. In both cases, the energy deposition of the ions is characterized by dense localized electronic excitations and efficient transfer to the lattice. Furthermore, the irradiation results in a shift in the band gap energy as evidenced by UV-Vis absorption spectroscopy. Specific modifications (e.g. hillock size, energy loss threshold) induced by slow highly charged ions are discussed in comparison with effects due to the electronic energy loss by swift heavy ions. (C) 2013 Elsevier B.V. All rights reserved.
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收藏
页码：265 / 268
页数：4
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