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K: Fachverband Kurzzeit- und angewandte Laserphysik

K 2: Poster

K 2.13: Poster

Tuesday, March 15, 2022, 16:30–18:30, P

Generation of Nanoparticle for Investigation of Laser Induced Transfer — •Jannik Wagner, Philip Mosel, Pranitha Sankar, Elisa Appi, Uwe Morgner, and Milutin Kovacev — Institute of Quantum Optics, Cluster of Excellence PhoenixD and Quantum Frontiers, Leibniz Universität Hannover, Hannover, 30167, Germany

Nanoparticles are used for microfabrication technologies that enable controlled deposition of a wide variety of materials.[1] There are two established methods for nanoparticle generation: laser-induced forward transfer (LIFT) and laser-induced backward transfer (LIBT). These methods differ primarily in the direction in which the particle is ejected relative to the laser propagation. The laser pulse heats the metal donor substrate and forms a bubble of liquid metal due to surface tension. The collapse of the bubble produces a spherical nanoparticle.[2]

In this work, single particles with size <5 um are generated using a pulsed ns laser system in LIBT and LIFT configuration. The change of particle size with photon flux and varied laser focus position is investigated. In addition, the formation of the particles is optically tracked and imaged.

[1] Zacharatos et al., Optics & Laser Technology 135: 106660 (2021)

[2] Kuznetsov et al., Appl. Phys. A 106, 479-487 (2012)