Design of a room-temperature topological exciton-polariton laser in a photonic crystal slab

I Septembre, C Leblanc, L Hermet, HS Nguyen… - Physical Review B, 2023 - APS
We propose theoretically a scheme to get a room-temperature two-dimensional topological
exciton-polariton laser with propagating topological lasing modes. The structure uses …

Photoemission Study of GaN Passivation Layers and Band Alignment at GaInP (100) Heterointerfaces

S Shekarabi, MA Zare Pour, H Su… - … Applied Materials & …, 2025 - ACS Publications
To date, III–V semiconductor-based tandem devices with GaInP top photoabsorbers show
the highest solar-to-electricity or solar-to-fuel conversion efficiencies. In …

Subpicosecond Spectroscopic Ellipsometry of the Photoinduced Phase Transition in VO2 Thin Films

Y Gutiérrez, S Vázquez-Miranda, S Espinoza… - ACS …, 2024 - ACS Publications
We report the first application of broadband time-resolved pump–probe ellipsometry to study
the ultrafast dynamics of the photoinduced insulator-to-metal transition (IMT) in vanadium …

[HTML][HTML] Time-resolved pump–probe spectroscopic ellipsometry of cubic GaN II: Absorption edge shift with gain and temperature effects

E Baron, R Goldhahn, S Espinoza… - Journal of Applied …, 2023 - pubs.aip.org
We recently published a study concerning femtosecond pump–probe absorption edge
spectroscopy of cubic GaN (fundamental bandgap: 3.23 eV), resulting in the transient …

[HTML][HTML] Disentangling the evolution of electrons and holes in photoexcited ZnO nanoparticles

CJ Milne, N Nagornova, T Pope, HY Chen… - Structural …, 2023 - pubs.aip.org
The evolution of charge carriers in photoexcited room temperature ZnO nanoparticles in
solution is investigated using ultrafast ultraviolet photoluminescence spectroscopy, ultrafast …

Hot-phonon effects in photo-excited wide-bandgap semiconductors

O Herrfurth, E Krüger, S Blaurock… - Journal of Physics …, 2021 - iopscience.iop.org
Carrier and lattice relaxation after optical excitation is simulated for the prototypical wide-
bandgap semiconductors CuI and ZnO. Transient temperature dynamics of electrons, holes …

[HTML][HTML] Time-resolved pump–probe spectroscopic ellipsometry of cubic GaN. I. Determination of the dielectric function

E Baron, R Goldhahn, S Espinoza… - Journal of Applied …, 2023 - pubs.aip.org
An ultra-fast change of the absorption onset for zincblende gallium-nitride (zb-
GaN)(fundamental bandgap: 3.23 eV) is observed by investigating the imaginary part of the …

Broadband Mueller ellipsometer as an all-in-one tool for spectral and temporal analysis of mutarotation kinetics

D Vala, M Mičica, D Cvejn, K Postava - RSC advances, 2023 - pubs.rsc.org
Spectroscopic Mueller matrix ellipsometry is becoming increasingly routine across physical
branches of science, even outside optics. The highly sensitive tracking of the polarization …

[PDF][PDF] Effekte freier Ladungsträger auf die optischen Eigenschaften von kubischem Galliumnitrid

E Baron - 2023 - opendata.uni-halle.de
Spätestens seit dem Nobelpreis 2014 für die Entwicklung der blauen Leucht-Emitter-Diode
(LED)[1–4] sind die Gruppe III-Nitride im Fokus von wissenschaftlichem und industriellem …

Femtosecond pump-probe absorption edge spectroscopy of cubic GaN

E Baron, R Goldhahn, S Espinoza, M Zahradník… - arXiv preprint arXiv …, 2022 - arxiv.org
Time-dependent femtosecond pump-probe spectroscopic ellipsometry studies on
zincblende gallium-nitride (zb-GaN) are performed and analyzed between 2.9-3.7 eV. An …