Laser surface structuring of diamond with ultrashort Bessel beams.
Sanjeev Kumar, Shane M Eaton, Monica Bollani, Belén Sotillo, Andrea Chiappini, Maurizio Ferrari, Roberta Ramponi, Paolo Di Trapani, Ottavia Jedrkiewicz
Author Information
Sanjeev Kumar: Department of Science and High technology, Università dell'Insubria, via Valleggio 11, 22100, Como, Italy.
Shane M Eaton: Institute for Photonics and Nanotechnologies, CNR and Department of Physics, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milano, Italy.
Monica Bollani: Institute for Photonics and Nanotechnologies, CNR, L-NESS, Via Anzani 42, 22100, Como, Italy.
Belén Sotillo: Institute for Photonics and Nanotechnologies, CNR and Department of Physics, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milano, Italy.
Andrea Chiappini: Institute for Photonics and Nanotechnologies, CNR, CSMFO Lab., Via alla Cascata 56/C, Povo, Trento, 38123, Italy.
Maurizio Ferrari: Institute for Photonics and Nanotechnologies, CNR, CSMFO Lab., Via alla Cascata 56/C, Povo, Trento, 38123, Italy.
Roberta Ramponi: Institute for Photonics and Nanotechnologies, CNR and Department of Physics, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milano, Italy. ORCID
Paolo Di Trapani: Department of Science and High technology, Università dell'Insubria, via Valleggio 11, 22100, Como, Italy.
Ottavia Jedrkiewicz: Institute for Photonics and Nanotechnologies, CNR, Udr Como, Via Valleggio 11, 22100, Como, Italy. ottavia.jedrkiewicz@ifn.cnr.it.
We investigate the effect of ultrafast laser surface machining on a monocrystalline synthetic diamond sample by means of pulsed Bessel beams. We discuss the differences of the trench-like microstructures generated in various experimental conditions, by varying the beam cone angle, the energy and pulse duration, and we present a brief comparison of the results with those obtained with the same technique on a sapphire sample. In diamond, we obtain V-shaped trenches whose surface width varies with the cone angle, and which are featured by micrometer sized channels having depths in the range of 10-20 μm. By laser writing crossed trenches we are also able to create and tailor on the diamond surface pillar-like or tip-like microstructures potentially interesting for large surface functionalization, cells capturing and biosensing.
