Laser-induced resonant vibrational excitations of precursor molecules in multi-energy processing for diamond synthesis

Z. Q. Xie, X. N. He, Y. Gao, Y. S. Zhou, J. B. Park, T. Guillemet, Y. F. Lu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A wavelength-tunable CO2 laser (spectrum range from 9.2 to 10.9 μm) was applied in a multi-energy process for growing diamond crystals in open air. A pre-mixed C2H4/C2H 2/O2 gas was used as precursors for the diamond growth. Laser energy was coupled into the reactions through resonantly exciting the CH2-wagging mode of ethylene (C2H4) molecules by tuning the laser wavelength to 10.532 μm. Diamond growth rate and diamond quality were both promoted by the laser-induced resonant excitations. High-quality diamond crystals were grown on silicon substrates with a high growth rate of ∼139 μm/hr. Diamond crystals up to 5 mm in height and 1 mm in diameter were grown in open air in 36 hours. Sharp Raman peak at 1332 cm-1 with a full width at half maximum value around 4.5 cm -1 and distinct X-ray diffraction spectra indicate the high quality of the diamond crystals.

Original languageEnglish (US)
Title of host publication29th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2010 - Congress Proceedings
PublisherLaser Institute of America
Pages1444-1449
Number of pages6
ISBN (Print)9780912035611
DOIs
StatePublished - 2010

Publication series

Name29th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2010 - Congress Proceedings
Volume103

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Radiation

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    Xie, Z. Q., He, X. N., Gao, Y., Zhou, Y. S., Park, J. B., Guillemet, T., & Lu, Y. F. (2010). Laser-induced resonant vibrational excitations of precursor molecules in multi-energy processing for diamond synthesis. In 29th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2010 - Congress Proceedings (pp. 1444-1449). (29th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2010 - Congress Proceedings; Vol. 103). Laser Institute of America. https://doi.org/10.2351/1.5061999