Abstract:

As advances in nanofabrication push the feature dimensions of complex systems into the few-nanometer range, macroscopic models fail to accurately describe their behavior and traditional metrology tools struggle to precisely measure their properties. To overcome these challenges, we use a dynamic scatterometry tool, based on coherent extreme ultraviolet beams, to map the non-diffusive heat flow away from nanoscale sources. Additionally, we extract the full elastic tensor of ultrathin films down to 5 nm thicknesses, finding that doping and surfaces alters the mechanical properties. Moreover, we extend these measurements to probe the mechanical, structural, and thermal properties of complex metalattices.

Bio:

Begoña Abad carried out her PhD in Physics at the IMN-CSIC, Spain, on the development of thermal property measurement techniques to characterize the efficiency of thermoelectric materials. In 2016 she moved to the University of Colorado Boulder (USA) where she joined the Kapteyn-Murnane group at JILA. She used coherent extreme ultraviolet light to uncover phonon and acoustic dynamics of nanoscale materials. Recently, she joined the Nanophononics group at University of Basel (Switzerland) where she is implementing advanced Raman spectroscopy techniques to explore coherent and hydrodynamic phonon transport in nanoscale systems.

Hosted by Riccardo Rurali, Materials Theory and Simulation Group

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