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- Title
Thermodynamic processes on a semiconductor surface during in-situ multibeam laser interference patterning.
- Authors
Yun-Ran Wang; Chao-Yuan Jin; Chih-Hua Ho; Si Chen; Francis, Henry; Hopkinson, Mark
- Abstract
Laser interference has been widely used to produce one-dimensional gratings and more recently has shown great potential for two-dimensional patterning. In this study, the authors examine by simulation, its application to in-situ patterning during materials growth. To understand the potential, it is important to study the surface processes resulting from the laser-matter interaction, which have a key influence on the resulting growth mechanisms. In this work, the intensity distribution and the laser-semiconductor interaction resulting from four-beam interference patterns are analysed by numerical simulations. In particular, the authors derive the time and spatially dependent thermal distribution along with the thermal-induced desorption and surface diffusion. The results provide a crucial understanding of the light-induced thermal profile and show that the surface temperature and the surface adatom kinetics can be controlled by multi-beam pulsed laser interference patterning due to photothermal reactions. The approach has potential as an in-situ technique for the fast and precise nanostructuring of semiconductor material surfaces.
- Subjects
OPTICAL interference; THERMAL properties of semiconductors; NANOPATTERNING; ADATOMS; SURFACE diffusion; NANOSTRUCTURED materials; SEMICONDUCTOR materials
- Publication
IET Optoelectronics (Wiley-Blackwell), 2019, Vol 13, Issue 1, p7
- ISSN
1751-8768
- Publication type
Article
- DOI
10.1049/iet-opt.2018.5028