All-Optical Control of Interfacial Polarization in MoS2/WSe2 Heterobilayers.
- 1Institut für Festkörpertheorie und Optik, Friedrich-Schiller-Universität Jena, 07743Jena, Germany.
- 2Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena, 07743Jena, Germany.
- 3Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, 07745Jena, Germany.
Abstract
All-optical tuning of van der Waals (vdW) heterostructures with coherent radiation offers a powerful strategy for manipulating interfacial electronic properties on femtosecond time scales. Using real-time time-dependent density functional theory, we predict a transient out-of-plane polarization in MoS2/WSe2 heterobilayers driven by intense ultrafast pulses. In the weak-field regime, the system preserves its intrinsic type-II band alignment, whereas at intermediate intensities, the field triggers a nonlinear enhancement of interlayer charge transfer. High-harmonic generation spectra undergo a crossover from the perturbative to the strong-field regime accompanied by the pronounced enhancement of a photoinduced interfacial dipole. At the highest intensities, interlayer polarization enhancement is sustained by massive field-driven spatial delocalization of electronic density into the vdW gap, promoted by localized charge saturation due to Pauli blocking. Lattice strain modifies the resonance conditions while preserving this strong-field polarization enhancement, establishing a microscopic mechanism for all-optical manipulation of interfacial dipoles at the ultrafast timescale.
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BibTeX
@article{ramzan2026alloptical,
title = {{All-Optical Control of Interfacial Polarization in MoS2/WSe2 Heterobilayers.}},
author = {Muhammad Sufyan Ramzan and Giancarlo Soavi and Caterina Cocchi},
journal = {Nano letters},
year = {2026},
month = oct,
doi = {10.1021/acs.nanolett.6c02950},
url = {https://europepmc.org/article/MED/42905076},
note = {CC BY},
}
RIS
TY - JOUR
TI - All-Optical Control of Interfacial Polarization in MoS2/WSe2 Heterobilayers.
AU - Muhammad Sufyan Ramzan
AU - Giancarlo Soavi
AU - Caterina Cocchi
PY - 2026
DA - 2026/10/01
JO - Nano letters
DO - 10.1021/acs.nanolett.6c02950
UR - https://europepmc.org/article/MED/42905076
AB - All-optical tuning of van der Waals (vdW) heterostructures with coherent radiation offers a powerful strategy for manipulating interfacial electronic properties on femtosecond time scales. Using real-time time-dependent density functional theory, we predict a transient out-of-plane polarization in MoS2/WSe2 heterobilayers driven by intense ultrafast pulses. In the weak-field regime, the system preserves its intrinsic type-II band alignment, whereas at intermediate intensities, the field triggers a nonlinear enhancement of interlayer charge transfer. High-harmonic generation spectra undergo a crossover from the perturbative to the strong-field regime accompanied by the pronounced enhancement of a photoinduced interfacial dipole. At the highest intensities, interlayer polarization enhancement is sustained by massive field-driven spatial delocalization of electronic density into the vdW gap, promoted by localized charge saturation due to Pauli blocking. Lattice strain modifies the resonance conditions while preserving this strong-field polarization enhancement, establishing a microscopic mechanism for all-optical manipulation of interfacial dipoles at the ultrafast timescale.
SN - 1530-6984
SN - 1530-6992
ER -