Abstract
We report on the fabrication of graphitic columns induced in single-crystal diamond plates using 100 fs laser pulses at 800 nm wavelength. Different values of laser fluence (0.6–1.2 J/cm2) and graphitization speed (1–100 μm/s) were used for the laser treatment. A Raman investigation was performed aimed at evaluating the structural properties of the fabricated columns, showing that a lower laser fluence and a proper choice of graphitization speed may improve the degree of graphite crystallinity, and suppress the residual diamond content.
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Acknowledgments
The activity was supported by the European Community FP7-Energy Project ProME3ThE2US2 “Production Method of Electrical Energy by Enhanced Thermal Electron Emission by the Use of Superior Semiconductors”, Grant Agreement no. 308975, website: http://www.prometheus-energy.eu.
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Girolami, M., Bellucci, A., Calvani, P. et al. Raman investigation of femtosecond laser-induced graphitic columns in single-crystal diamond. Appl. Phys. A 117, 143–147 (2014). https://doi.org/10.1007/s00339-014-8310-x
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DOI: https://doi.org/10.1007/s00339-014-8310-x