3 papers
cond-mat.mtrl-sci2025
Substrate matters: Coupled phonon modes of a spherical particle on a substrate probed with EELS
Ka Yin Lee, Elliot K. Beutler, Tifany Q. Crisolo +2
Using vibrational electron energy loss spectroscopy (vib-EELS) combined with numerical modeling, we investigate the physical mechanisms governing the phonon coupling between a sphe…
physics.optics2025
Conservation of optical chirality in nanoscale light-matter interactions: A study of the Born-Kuhn model system
Kevin N. Moser, Marc R. Bourgeois, Elliot K. Beutler +1
Optical chirality density is a measure of the local handedness of electromagnetic fields. Like energy density, it may be absorbed or scattered through the interaction between light…
cond-mat.mtrl-sci2024
Probing the Polarization of Low-Energy Excitations in 2D Materials from Atomic Crystals to Nanophotonic Arrays using Momentum-Resolved Electron Energy Loss Spectroscopy
Andrew W. Rossi, Marc R. Bourgeois, Caleb Walton +1
Spectroscopies utilizing free electron beams as probes offer detailed information on the reciprocal-space excitations of 2D materials such as graphene and transition metal dichalco…