The structural changes and optical properties of LiNbO3 after Er implantation using high ion fluencies

0433012 - ÚJF 2015 RIV NL eng J - Journal Article
Macková, Anna - Malinský, Petr - Pupíková, Hana - Nekvindová, P. - Cajzl, J. - Sofer, Z. - Wilhelm, R. A. - Kolitsch, A. - Oswald, Jiří
The structural changes and optical properties of LiNbO3 after Er implantation using high ion fluencies.
Nuclear Instruments & Methods in Physics Research Section B. Roč. 332, AUG (2014), s. 74-79. ISSN 0168-583X. E-ISSN 1872-9584.
[21st International Conference on Ion Beam Analysis (IBA). Seattle, 23.06.2013-28.06.2013]
R&D Projects: GA MŠMT(XE) LM2011019; GA ČR(CZ) GBP108/12/G108
Institutional support: RVO:68378271 ; RVO:61389005
Keywords : Implanted lithium niobate * Erbium implantation * RBS channeling structural study * Luminesent properties
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders; BM - Solid Matter Physics ; Magnetism (FZU-D)
Impact factor: 1.124, year: 2014

The structural and compositional changes of LiNbO3 implanted with 190 key Er+ ions into various crystallographic cuts with fluencies of 1 x 10(16) and 5 x 10(16) cm(-2) were studied. The effect of post-implantation annealing at 1000 degrees C in oxygen atmosphere was also examined. Concentration depth profiles of implanted erbium, determined by Rutherford Backscattering Spectrometry (RBS), are broader than those from the SRIM simulation. The maximum erbium concentration (of up to 8 at.%) is observed at the depth of about 50 nm, for all crystal cuts. The structure of the implanted layers were characterised by RBS-channelling method. The lower relative number of disordered atoms in the crystalline matrix was observed in the lithium niobate (LN) implanted at a fluence of 1 x 10(16) cm(-2), where also the preferential position of the erbium in substitutional sites was observed when compared to the randomly distributed erbium in interstitial positions at a fluence of 5 x 10(16) cm(-2) after the annealing. Surface-morphology changes at the highest implantation fluencies were studied using Atomic Force Microscopy (AFM). Since we were interested in the relation between the structural changes and optical properties, erbium luminescence properties were measured in the region of 1440-1650 nm. The positive effect of post-implantation annealing on the luminescence properties caused by structural recovery was proved.
Permanent Link: http://hdl.handle.net/11104/0237341