Femtosecond laser diagnostics of thin films, surfaces and interfaces
Date
2005
Journal Title
Journal ISSN
Volume Title
Publisher
Academy of Science for South Africa
Abstract
An overview is given of optical second harmonic generation (SHG) using femtosecond laser pulses to analyse technologically important crystalline materials. The principle of SHG is briefly explained and a typical experimental setup for SHG is outlined. The second harmonic (SH) measurements performed in prototype compound semiconductors reveal the crystalline structure and orientation of monocrystalline SiC, polycrystalline ZnO, and the ternary compound, PbxCd1-xTe, showing the segregation of a Pb-and a Cd-rich phase. Furthermore, SHG can selectively probe the Si/SiO2 interface and the build-up of its electric field induced by laser-activated charge carrier separation. The examples presented demonstrate that SHG is a versatile technique to probe the structural and electronic properties of crystalline materials and particularly surfaces and interfaces.
Description
CITATION: Scheidt, T., et al. 2005. Femtosecond laser diagnostics of thin films, surfaces and interfaces. South African Journal of Science, 101(5-6):267-271.
The original publication is available at https://journals.co.za
The original publication is available at https://journals.co.za
Keywords
Crystalline interfaces, Femtosecond lasers
Citation
Scheidt, T., et al. 2005. Femtosecond laser diagnostics of thin films, surfaces and interfaces. South African Journal of Science, 101(5-6):267-271