Synthesis of Multiphase Metallic Oxides by Femtosecond Laser Irradiation of Metallic Thin Films
Abstract
We studied the formation of metallic oxides under femtosecond (fs) laser irradiation at MHz repetition rate, for different atmospheres on metallic films. We found that the synthesis of molybdenum oxides is significantly affected by the processing atmosphere i.e. ambient air vs pure oxygen. The oxide formation under the same laser irradiation conditions produces distinct crystalline phases depending on the processing atmosphere. In the case of ZnO synthesis by using fs laser pulses we found that the laser irradiation conditions determine the crystalline quality of the obtained ZnO. Under certain laser irradiation conditions the density of point defects increases, which is revealed by microRaman spectroscopy and cathodoluminescence measurements. ZnO nanoparticles(NPs) were proven to produce second harmonic generation when irradiated with fs laser pulses, the features of the SHG signal shows unexpected polarization dependence; it is related to the randomly oriented NPs.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 05, 2019
- Accession Number
- AD1085816
Entities
People
- Santiago Camacho-lopez