Spatially-resolved multiphoton photoemission from a lateral transition metal dichalcogenide heterostructure
Abstract
Transition metal dichalcogenides (TMDs) in their monolayer form offer a premier platform for next-generation optoelectronics, particularly through the local manipulation of their robust excitonic states using nanoscale electric fields. These localized states can be dynamically controlled through spatial structuring as well as through ultrafast field modulations driven by tailored optical pulses. Characterizing the resulting rapid, nanoscale charge carrier dynamics requires a technique with exceptional spatial and temporal resolution. Here, we report on the spatio-temporally resolved investigation of ground state and excited state photoemission from a lateral heterostructure built of monolayers of WSe2 and MoSe2 using few-cycle light pulses with a photon energy of 0.62 eV. We utilize photoemission electron microscopy to spatially resolve the highly nonlinear photoemission from the monolayer structure with few tens of nanometer resolution. By varying the laser pulse energy, we extract the nonlinearity of the photoemission process and thus the dynamic binding energy of the photoelectrons before and after optical excitation with high spatial and temporal resolution.
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BibTeX
@misc{hansen2026spatiallyresolved,
title = {{Spatially-resolved multiphoton photoemission from a lateral transition metal dichalcogenide heterostructure}},
author = {Lina Hansen and Paul Martin and Sai Shradha and Julian Picker and Arvid Klösgen and Kerstin Harland and Katrin Meier and Andrey Turchanin and Bernhard Urbaszek and Jan Vogelsang},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.02603},
eprint = {2609.02603},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.02603},
}
RIS
TY - UNPB
TI - Spatially-resolved multiphoton photoemission from a lateral transition metal dichalcogenide heterostructure
AU - Lina Hansen
AU - Paul Martin
AU - Sai Shradha
AU - Julian Picker
AU - Arvid Klösgen
AU - Kerstin Harland
AU - Katrin Meier
AU - Andrey Turchanin
AU - Bernhard Urbaszek
AU - Jan Vogelsang
PY - 2026
DA - 2026/09/02
PB - arXiv
DO - 10.48550/arxiv.2609.02603
UR - https://arxiv.org/abs/2609.02603
AB - Transition metal dichalcogenides (TMDs) in their monolayer form offer a premier platform for next-generation optoelectronics, particularly through the local manipulation of their robust excitonic states using nanoscale electric fields. These localized states can be dynamically controlled through spatial structuring as well as through ultrafast field modulations driven by tailored optical pulses. Characterizing the resulting rapid, nanoscale charge carrier dynamics requires a technique with exceptional spatial and temporal resolution. Here, we report on the spatio-temporally resolved investigation of ground state and excited state photoemission from a lateral heterostructure built of monolayers of WSe_2 and MoSe_2 using few-cycle light pulses with a photon energy of 0.62 eV. We utilize photoemission electron microscopy to spatially resolve the highly nonlinear photoemission from the monolayer structure with few tens of nanometer resolution. By varying the laser pulse energy, we extract the nonlinearity of the photoemission process and thus the dynamic binding energy of the photoelectrons before and after optical excitation with high spatial and temporal resolution.
ER -