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Femtosecond laser irradiation of synthetic single crystal diamond: studies of surface ripples and ablation thresholds
| Content Provider | Semantic Scholar |
|---|---|
| Author | Brawley-Hayes, Jasper A. Z. |
| Copyright Year | 2012 |
| Abstract | This thesis explores the ablation and texturing of synthetic single crystal diamond under ultrashort laser pulse irradiation in rough vacuum ambient conditions. The study has two main themes. First, the production of ordered periodic nanostructures, called ripples, on the diamond surface is characterized and the periodicity of these structures is analyzed against irradiation parameters. Second, the ablation thresholds for a wide range of numbers of incident ultrashort pulses on diamond is measured and the behaviour is analyzed. Experiments were performed with a 1 kHz repetition rate titanium sapphire laser system producing pulses at 800 nm central wavelength and 150 fs duration. In the interpretation of many of these experiments, the issue of sample surface quality must be considered due to the presence of a thin layer of surface contamination and deep pitting (hundreds of nanometers) in the diamond surface. These factors are taken into account when discussing the results of the following studies. Future work with similar experiments performed on newly acquired, higher quality diamond samples is expected to mitigate these issues. The study on ripples aims to provide a framework with which to test contesting theories of their formation and to attempt to control ordered sub-wavelength ripples formation. To this end, irradiation of single crystal diamond at a central wavelength |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://macsphere.mcmaster.ca/bitstream/11375/12425/1/fulltext.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
