Abstract
The effect of ion implantation on LiNbO3 crystal is studied using electron paramagnetic resonance spectroscopy (EPR). EPR measurements on these crystals were performed as a function of ion species Mn and Fe and fluence at room temperature. Also the effect of the laser illumination on the EPR signal was determined by illuminating the crystal in situ and measuring the decay and growth of the EPR signal. LiNbO3:Mn2+ at a depth of approximately 200 nm was formed by implantation of 2.5 × 1014 and 1 × 1017 Mn/cm2 at 2 MeV. The implanted samples were compared with bulk doped crystals. It was found that the decay and growth of Mn EPR for the implanted crystal is very small compared with the bulk doped LiNbO3:Mn crystal. This was found to be primarily due to the spin concentration on the crystals. On the other hand, the decay time of the high fluence is about 40% slower than the decay of the low fluence implanted crystal.
Original language | English |
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Pages (from-to) | 679-683 |
Number of pages | 5 |
Journal | Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms |
Volume | 141 |
Issue number | 1-4 |
DOIs | |
State | Published - May 1998 |
Funding
Research sponsored by the Center for Nonlinear Optics and Materials and the Center for Irradiation of Materials of Alabama A&M University, and by the Division of Materials Science, US Department of Energy, under contract DE-AAC05-96OR22464 with Lockheed Martin Energy Research Corp.
Keywords
- EPR
- Ion implantation
- Laser illumination
- Photorefractive crystal
- Spin concentration
- Transition metal ions