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Laser patterning of diamond. Part I. Characterization of surface morphology

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4 Author(s)
Smedley, J. ; Brookhaven National Laboratory, Upton, New York 11973, USA ; Bohon, Jen ; Wu, Qiong ; Rao, T.

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As the use of diamond as a material for electronic and research applications increases, methods of patterning diamond will be required. In this work, single- and polycrystalline synthetic diamond samples were exposed to laser beams of different energies, wavelengths, and pulse durations. The effects of this exposure were characterized using optical microscopy, scanning electron microscopy, and atomic force microscopy. The threshold ablation energy density for 266 nm radiation with ∼30 ps pulse duration was measured to be ∼14 J/cm2. The threshold for ∼10 ns pulses at the same wavelength was similar, but the ablated area displayed larger surface damage. The surface damage and the threshold energy increase significantly for 532 and 1064 nm radiations. Ablation performed using 213 nm radiation produced the most uniform surface. Changes in the ablated surface are presented in detail.

Published in:

Journal of Applied Physics  (Volume:105 ,  Issue: 12 )

Date of Publication:

Jun 2009

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