Direct micro-structuring of Si(111) surfaces through nanosecond-laser Bessel beams

Erkan Demirci, Elif Turkan Aksit Kaya, Ramazan Sahin

We present here a nanosecond laser ablation of Si(111) wafer with diffraction-free (Bessel-$J_0$) beams. First, the Axicon a conical shaped optical element for beam shaping is char…