skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Buried amorphous layers by electronic excitation in ion-beam irradiated lithium niobate: Structure and kinetics

Abstract

The formation of buried heavily damaged and amorphous layers by a variety of swift-ion irradiations (F at 22 MeV, O at 20 MeV, and Mg at 28 MeV) on congruent LiNbO{sub 3} has been investigated. These irradiations assure that the electronic stopping power S{sub e}(z) is dominant over the nuclear stopping S{sub n}(z) and reaches a maximum value inside the crystal. The structural profile of the irradiated layers has been characterized in detail by a variety of spectroscopic techniques including dark-mode propagation, micro-Raman scattering, second-harmonic generation, and Rutherford backscattering spectroscopy/channeling. The growth of the damage on increasing irradiation fluence presents two differentiated stages with an abrupt structural transition between them. The heavily damaged layer reached as a final stage is optically isotropic (refractive index n=2.10, independent of bombarding ion) and has an amorphous structure. Moreover, it has sharp profiles and its thickness progressively increases with irradiation fluence. The dynamics under irradiation of the amorphous-crystalline boundaries has been associated with a reduction of the effective amorphization threshold due to the defects created by prior irradiation (cumulative damage). The kinetics of the two boundaries of the buried layer is quite different, suggesting that other mechanisms aside from the electronic stopping power shouldmore » play a role on ion-beam damage.« less

Authors:
; ; ; ; ; ;  [1];  [2];  [3];  [4]
  1. Instituto de Optica, CSIC, C/Serrano 121, E-28006 Madrid (Spain)
  2. (CMAM), Universidad Autonoma de Madrid, E-28049 Madrid (Spain)
  3. (ICMM), CSIC, Campus de Cantoblanco, E-28049 Madrid (Spain)
  4. (Spain)
Publication Date:
OSTI Identifier:
20982670
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 101; Journal Issue: 3; Other Information: DOI: 10.1063/1.2434801; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AMORPHOUS STATE; CHANNELING; CRYSTAL DEFECTS; CRYSTAL GROWTH; EXCITATION; HARMONIC GENERATION; ION BEAMS; IRRADIATION; LAYERS; LITHIUM COMPOUNDS; MEV RANGE 10-100; NIOBATES; NIOBIUM OXIDES; RAMAN EFFECT; RAMAN SPECTRA; REFRACTIVE INDEX; RUTHERFORD BACKSCATTERING SPECTROSCOPY; STOPPING POWER

Citation Formats

Olivares, J., Garcia-Navarro, A., Garcia, G., Agullo-Lopez, F., Agullo-Rueda, F., Garcia-Cabanes, A., Carrascosa, M., Centro de Microanalisis de Materiales, Instituto de Ciencia de Materiales de Madrid, and Departamento de Fisica de Materiales C-IV, Universidad Autonoma de Madrid, E-28049 Madrid. Buried amorphous layers by electronic excitation in ion-beam irradiated lithium niobate: Structure and kinetics. United States: N. p., 2007. Web. doi:10.1063/1.2434801.
Olivares, J., Garcia-Navarro, A., Garcia, G., Agullo-Lopez, F., Agullo-Rueda, F., Garcia-Cabanes, A., Carrascosa, M., Centro de Microanalisis de Materiales, Instituto de Ciencia de Materiales de Madrid, & Departamento de Fisica de Materiales C-IV, Universidad Autonoma de Madrid, E-28049 Madrid. Buried amorphous layers by electronic excitation in ion-beam irradiated lithium niobate: Structure and kinetics. United States. doi:10.1063/1.2434801.
Olivares, J., Garcia-Navarro, A., Garcia, G., Agullo-Lopez, F., Agullo-Rueda, F., Garcia-Cabanes, A., Carrascosa, M., Centro de Microanalisis de Materiales, Instituto de Ciencia de Materiales de Madrid, and Departamento de Fisica de Materiales C-IV, Universidad Autonoma de Madrid, E-28049 Madrid. Thu . "Buried amorphous layers by electronic excitation in ion-beam irradiated lithium niobate: Structure and kinetics". United States. doi:10.1063/1.2434801.
@article{osti_20982670,
title = {Buried amorphous layers by electronic excitation in ion-beam irradiated lithium niobate: Structure and kinetics},
author = {Olivares, J. and Garcia-Navarro, A. and Garcia, G. and Agullo-Lopez, F. and Agullo-Rueda, F. and Garcia-Cabanes, A. and Carrascosa, M. and Centro de Microanalisis de Materiales and Instituto de Ciencia de Materiales de Madrid and Departamento de Fisica de Materiales C-IV, Universidad Autonoma de Madrid, E-28049 Madrid},
abstractNote = {The formation of buried heavily damaged and amorphous layers by a variety of swift-ion irradiations (F at 22 MeV, O at 20 MeV, and Mg at 28 MeV) on congruent LiNbO{sub 3} has been investigated. These irradiations assure that the electronic stopping power S{sub e}(z) is dominant over the nuclear stopping S{sub n}(z) and reaches a maximum value inside the crystal. The structural profile of the irradiated layers has been characterized in detail by a variety of spectroscopic techniques including dark-mode propagation, micro-Raman scattering, second-harmonic generation, and Rutherford backscattering spectroscopy/channeling. The growth of the damage on increasing irradiation fluence presents two differentiated stages with an abrupt structural transition between them. The heavily damaged layer reached as a final stage is optically isotropic (refractive index n=2.10, independent of bombarding ion) and has an amorphous structure. Moreover, it has sharp profiles and its thickness progressively increases with irradiation fluence. The dynamics under irradiation of the amorphous-crystalline boundaries has been associated with a reduction of the effective amorphization threshold due to the defects created by prior irradiation (cumulative damage). The kinetics of the two boundaries of the buried layer is quite different, suggesting that other mechanisms aside from the electronic stopping power should play a role on ion-beam damage.},
doi = {10.1063/1.2434801},
journal = {Journal of Applied Physics},
number = 3,
volume = 101,
place = {United States},
year = {Thu Feb 01 00:00:00 EST 2007},
month = {Thu Feb 01 00:00:00 EST 2007}
}