Electronic damage in quartz (c-SiO2) by MeV ion irradiations: Potentiality for optical waveguiding applications

[摘要] The damage induced on quartz (c-SiO2) by heavy ions (F, O, Br) at MeV energies, where electronic stopping is dominant, has been investigated by RBS/C and optical methods. The two techniques indicate the formation of amorphous layers with an isotropic refractive index (n = 1.475) at fluences around 10(14) cm(-2) that are associated to electronic mechanisms. The kinetics of the process can be described as the super-position of linear (possibly initial Poisson curve) and sigmoidal (Avrami-type) contributions. The coexistence of the two kinetic regimes may be associated to the differential roles of the amorphous track cores and preamorphous halos. By using ions and energies whose maximum stopping power lies inside the crystal (0 at 13 MeV, F at 15 MeV and F at 30 MeV) buried amorphous layer are formed and optical wave-guides at the sample surface have been generated. (C) 2011 Elsevier B.V. All rights reserved.

[发布日期] 2012-02-01

[效力级别]  Proceedings Paper

[关键词] Quartz;Electronic damage;Swift ions;Optical waveguides