Paper 14093-86
Paper 14093-86
Laser-Induced Forward Transfer of graphene and hBN layers for digital photonic fabrication of 2D optoelectronic devices
On demand | Presented live 15 April 2026 
Abstract
We present a photonic, mask-free, and solvent-free Laser-Induced Forward Transfer (LIFT) technique for the precise deposition of hBN and up to four graphene layers onto microstructured substrates. The method enables selective placement and patterning in a single step while preserving graphene’s crystallinity and electronic integrity. Electrical measurements using van der Pauw structures confirmed reliable extraction of sheet resistance, while photodetector devices exhibited tunable photoresponse dependent on graphene thickness. Optical, SEM, and Raman analyses verified structural uniformity and layer control. Furthermore, sequential LIFT printing of graphene–hBN–graphene stacks demonstrated stable, uniform heterostructures, establishing LIFT as a robust platform for scalable 2D material integration in optoelectronic and photonic systems.
Presenter
Nektaria Protopappa
National Technical University of Athens (Greece)
Nektaria Konstantina Protopappa is a Junior Researcher at the Laser Materials Printing and Processing (LMP), headed by Prof. Ioanna Zergioti, and located at the Physics Department of the National Technical University of Athens (NTUA). She received her Diploma in Physics from the University of Crete in 2022, where she also conducted research at the Institute of Electronic Structure and Laser (IESL) of the Foundation for Research and Technology – Hellas (FORTH). In 2025, she earned her Master’s degree in Microsystems and Nanodevices from NTUA. Her current research focuses on material processing for electronic applications, including Laser-Induced Forward Transfer (LIFT), laser soldering, and laser-assisted bonding and packaging technologies. She is particularly interested in developing and optimizing laser-based processes for advanced interconnection materials and next-generation device manufacturing.