Probing excitons with time-resolved momentum microscopy

M Reutzel, GSM Jansen, S Mathias - Advances in Physics: X, 2024 - Taylor & Francis
Excitons–two-particle correlated electron-hole pairs–are the dominant low-energy optical
excitation in the broad class of semiconductor materials, which range from classical silicon …

Ultrafast dynamics of bright and dark excitons in monolayer WSe2 and heterobilayer WSe2/MoS2

JP Bange, P Werner, D Schmitt, W Bennecke… - 2D …, 2023 - iopscience.iop.org
The energy landscape of optical excitations in mono-and few-layer transition metal
dichalcogenides (TMDs) is dominated by optically bright and dark excitons. These excitons …

Electrically tunable non-radiative lifetime in WS 2/WSe 2 heterostructures

A Wang, X Wu, S Zhao, ZV Han, Y Shi, G Cerullo… - Nanoscale, 2024 - pubs.rsc.org
Van der Waals heterostructures based on transition metal dichalcogenides (TMDs) have
emerged as excellent candidates for next-generation optoelectronics and valleytronics, due …

Correlation-driven nonequilibrium exciton site transition in a WSe2/WS2 moiré supercell

J Kim, J Park, H Choi, T Kim, S Cha, Y Lee… - Nature …, 2024 - nature.com
Moiré superlattices of transition metal dichalcogenides offer a unique platform to explore
correlated exciton physics with optical spectroscopy. Whereas the spatially modulated …

The interlayer twist effectively regulates interlayer excitons in InSe/Sb van der Waals heterostructure

A Shi, R Guan, J Lv, Z Niu, W Zhang, S Wang… - npj Computational …, 2024 - nature.com
The interlayer twist angle endows a new degree of freedom to manipulate the spatially
separated interlayer excitons in van der Waals (vdWs) heterostructures. Herein, we find that …

Sub-100 fs Formation of Dark Excitons in Monolayer WS2

PV Kolesnichenko, L Wittenbecher, Q Zhang… - Nano Letters, 2024 - ACS Publications
Two-dimensional semiconducting transition metal dichalcogenides are promising materials
for optoelectronic applications due to their strongly bound excitons. While bright excitons …

Ozone Intercalation of Transition Metal Dichalcogenide Heterostructures Enhances Photoluminescence Efficiency for Potential Light Emitters

J Song, T Zheng, X Wei, X Zhao, Y Cui… - ACS Applied Nano …, 2024 - ACS Publications
The suppression of quantum efficiency of transition metal dichalcogenide (TMD)
heterostructures (HS) with type II band alignment leads to severe restriction of integration …

Fermionic versus bosonic thermalization in phonon-driven exciton dynamics: An analytic dimensionality study

M Katzer, M Selig, A Knorr - Physical Review B, 2024 - APS
Excitons are compound particles formed from an electron and a hole in semiconductors. The
impact of this substructure on the phonon-exciton interaction is described by a closed …

Time-resolved photoelectron spectroscopy at surfaces

M Aeschlimann, JP Bange, M Bauer, U Bovensiepen… - Surface Science, 2024 - Elsevier
Light is still an important spectroscopic tool for investigating the electronic structure of
surfaces. Time-resolved photoelectron spectroscopy has mainly been developed in the last …

Ultrafast Optical Control of Rashba Interactions in a TMDC Heterostructure

H Mittenzwey, A Kumar, R Dhingra, K Watanabe… - arXiv preprint arXiv …, 2024 - arxiv.org
We investigate spin relaxation dynamics of interlayer excitons in a MoSe2/MoS2
heterostructure induced by the Rashba effect. In such a system, Rashba interactions arise …