CO2 laser micromachining of nanocrystalline diamond films grown on doped silicon substrates
Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
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Yn: Optical Materials Express, Cyfrol 6, Rhif 12, 23.11.2016, t. 3916-3926.
Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
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T1 - CO2 laser micromachining of nanocrystalline diamond films grown on doped silicon substrates
AU - Richter, Jens
AU - Abdou, Aly
AU - Williams, Oliver A.
AU - Witzens, Jeremy
AU - Nezhad, Maziar P.
PY - 2016/11/23
Y1 - 2016/11/23
N2 - We demonstrate that nanocrystalline diamond films grown on highly doped silicon substrates can be patterned using a CO2 laser operating at a wavelength of 10.6 μm, where both low doped silicon and diamond exhibit negligible optical absorption. The patterning is initiated by free carrier absorption in the silicon substrate and further enhanced by the thermal runaway effect, which results in surface heating in the silicon substrate and subsequent thermal ablation of the diamond film in an oxygen rich atmosphere. Using this approach, micron-scale grating and dot patterns are patterned in thin film diamond. The localized heating is simulated and analyzed using concurrent optical and thermal finite element modelling. The laser patterning method described here offers a cost effective and rapid solution for micro-structuring diamond films.
AB - We demonstrate that nanocrystalline diamond films grown on highly doped silicon substrates can be patterned using a CO2 laser operating at a wavelength of 10.6 μm, where both low doped silicon and diamond exhibit negligible optical absorption. The patterning is initiated by free carrier absorption in the silicon substrate and further enhanced by the thermal runaway effect, which results in surface heating in the silicon substrate and subsequent thermal ablation of the diamond film in an oxygen rich atmosphere. Using this approach, micron-scale grating and dot patterns are patterned in thin film diamond. The localized heating is simulated and analyzed using concurrent optical and thermal finite element modelling. The laser patterning method described here offers a cost effective and rapid solution for micro-structuring diamond films.
U2 - 10.1364/OME.6.003916
DO - 10.1364/OME.6.003916
M3 - Article
VL - 6
SP - 3916
EP - 3926
JO - Optical Materials Express
JF - Optical Materials Express
SN - 2159-3930
IS - 12
ER -