Ef昀椀cient femtosecond laser as optical tweezer Maurizio Gullo and Bojan Resan are working on the optical tweezer setup and the new red diode for 3D printing of cells pumped alexandrite laser. (Image: FHNW Windisch) In the Nano-Argovia project NanoFemto Tweezers, researchers have started to develop optical tweezers that can be used to assemble di昀昀erent cell types, including neurons, in a tiny area. The interdisciplinary team is using femtosecond lasers and na- no-optical elements to build these optical traps (tweezers). “The Nano-Argovia project They plan to use a 3D printer to build organ systems from NanoFemto Tweezers allows us di昀昀erent cell types on a micrometer surface (body-on-chip) — to investigate and commercial- for example, to be able to study the e昀昀ects of drugs on di昀昀erent ize one of our novel lasers for organ systems on a chip. multiple new applications — Cooperation with: TLD Photonics AG // FHNW School of optical tweezers, multiphoton Engineering // FHNW School of Life Sciences imaging and micro-scale 3D Project description: https://bit.ly/3I6gAKd printing of biomedical tissues.” Stephan von Wolff, CEO, TLD Photonics AG 36 SNI Annual Report 2023