3 papers
cond-mat.mtrl-sci2019
Ultrafast dynamics of hot charge carriers in an oxide semiconductor probed by femtosecond spectroscopic ellipsometry
Steffen Richter, Oliver Herrfurth, Shirly Espinoza +8
Many linked processes occur concurrently in strongly excited semiconductors, such as interband and intraband absorption, scattering of electrons and holes by the heated lattice, Pa…
physics.optics2019
Optical properties of thin-film vanadium dioxide from the visible to the far infrared
Chenghao Wan, Zhen Zhang, David Woolf +13
The insulator-to-metal transition (IMT) in vanadium dioxide (VO2) can enable a variety of optics applications, including switching and modulation, optical limiting, and tuning of o…
cond-mat.mtrl-sci2015
Antiferromagnetic phase transition in the temperature-dependent NIR-VUV dielectric function of hexagonal YMnO
Steffen Richter, Stefan G. Ebbinghaus, Marius Grundmann +1
Hexagonal YMnO is well known for the co-occurrence of ferroelectricity and antiferromagnetism at low temperatures. Using temperature-dependent spectroscopic ellipsometry at an…