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(Color online) (a) Calculated intensity profile of Bessel beams produced with axicon of 40° base angle. Intensity is normalized to the threshold value. (b) Change of ablation width by pulse intensity, relative to the ablation threshold.
(Color online) Optical setup for nano-processing of metal thin films using Bessel beams.
SEM images of ablated stripes in Au thin film with laser wavelength of (a) 1030 nm and (b) 515 nm.
(Color online) The effect of pulse energy on stripe widths for the two laser wavelengths.
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