Laser-power-resolved excitations of ethylene molecules in laserassisted synthesis of diamond films

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

Research output: Contribution to conferencePaper

Abstract

Laser-power-resolved excitations of precursor molecules in laser-assisted synthesis of diamond films using a wavelength-tunable CO2 laser were studied. The wavelength of the CO2 laser was tuned to 10.532 μm to match a vibration mode of a precursor molecule, ethylene (C2H 4). The density of the incident laser power was adjusted to modify diamond crystal orientation, optimize diamond quality, and achieve high-efficiency laser energy coupling. It was observed that at incident laser power densities between 5×103 and 1.0×104 W/cm2, (100)-faceted diamond crystals were grown uniformly in the center areas of the diamond films. Higher incident laser powers, although further promoted growth rate, suppressed the uniformity of the diamond (100) facets. Best diamond quality was obtained within a laser power density range of 5×103 ∼ 6.7×103 W/cm2, whereas the highest energy efficiency was achieved within a laser power density range of 3.3×10 3∼ 6.7×103 W/cm2. The effects of the resonant laser energy coupling were investigated using optical emission spectroscopy.

Original languageEnglish (US)
Pages1211-1216
Number of pages6
StatePublished - Dec 7 2011
Event30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011 - Orlando, FL, United States
Duration: Oct 23 2011Oct 27 2011

Conference

Conference30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011
CountryUnited States
CityOrlando, FL
Period10/23/1110/27/11

Fingerprint

Diamond films
Ethylene
Diamond
Molecules
Lasers
Diamonds
ethylene
Wavelength
Optical emission spectroscopy
Laser tuning
Crystal orientation
Energy efficiency
Crystals

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

Cite this

Xie, Z. Q., He, X. N., Hu, W., Gao, Y., Guillemet, T., Park, J. B., ... Lu, Y. F. (2011). Laser-power-resolved excitations of ethylene molecules in laserassisted synthesis of diamond films. 1211-1216. Paper presented at 30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011, Orlando, FL, United States.

Laser-power-resolved excitations of ethylene molecules in laserassisted synthesis of diamond films. / Xie, Z. Q.; He, X. N.; Hu, W.; Gao, Y.; Guillemet, T.; Park, J. B.; Zhou, Y. S.; Lu, Y. F.

2011. 1211-1216 Paper presented at 30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011, Orlando, FL, United States.

Research output: Contribution to conferencePaper

Xie, ZQ, He, XN, Hu, W, Gao, Y, Guillemet, T, Park, JB, Zhou, YS & Lu, YF 2011, 'Laser-power-resolved excitations of ethylene molecules in laserassisted synthesis of diamond films', Paper presented at 30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011, Orlando, FL, United States, 10/23/11 - 10/27/11 pp. 1211-1216.
Xie ZQ, He XN, Hu W, Gao Y, Guillemet T, Park JB et al. Laser-power-resolved excitations of ethylene molecules in laserassisted synthesis of diamond films. 2011. Paper presented at 30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011, Orlando, FL, United States.
Xie, Z. Q. ; He, X. N. ; Hu, W. ; Gao, Y. ; Guillemet, T. ; Park, J. B. ; Zhou, Y. S. ; Lu, Y. F. / Laser-power-resolved excitations of ethylene molecules in laserassisted synthesis of diamond films. Paper presented at 30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011, Orlando, FL, United States.6 p.
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