Mechanisms of interlayer exciton emission and giant valley polarization in van der Waals heterostructures

EC Castro, DS Brandão, H Bragança, AS Martins… - Physical Review B, 2023 - APS
We perform a theoretical investigation about the valley dynamics of interlayer excitons (IXs)
in Mo S 2/WS 2 heterostructure with AB stacking configuration grown on ferromagnetic …

Tailoring the superposition of finite-momentum valley exciton states in transition-metal dichalcogenide monolayers by using polarized twisted light

GH Peng, OJG Sanchez, WH Li, PY Lo, SJ Cheng - Physical Review B, 2022 - APS
A twisted light is a spatially structured light that carries quantized orbital angular momenta
(OAM), being a new degree of freedom useful in quantum information technology in addition …

The key role of non-local screening in the environment-insensitive exciton fine structures of transition-metal dichalcogenide monolayers

WH Li, JD Lin, PY Lo, GH Peng, CY Hei, SY Chen… - Nanomaterials, 2023 - mdpi.com
In this work, we present a comprehensive theoretical and computational investigation of
exciton fine structures of WSe 2-monolayers, one of the best-known two-dimensional (2D) …

Enhanced Photo-excitation and Angular-Momentum Imprint of Gray Excitons in WSe2 Monolayers by Spin–Orbit-Coupled Vector Vortex Beams

OJ Gomez Sanchez, GH Peng, WH Li, CH Shih… - ACS …, 2024 - ACS Publications
A light beam can be spatially structured in the complex amplitude to possess orbital angular
momentum (OAM), which introduces an extra degree of freedom alongside the intrinsic spin …

[PDF][PDF] Switching of KQ intervalley trions fine structure and their dynamics in n-doped monolayer WS2

J Pei, X Liu, AG Del Águila, D Bao, S Liu… - Opto-Electronic …, 2023 - researching.cn
Monolayer group VI transition metal dichalcogenides (TMDs) have recently emerged as
promising candidates for photonic and opto-valleytronic applications. The optoelectronic …

Enhanced interactions of excitonic complexes in free-standing WS 2

X Sun, Z Lu, Y Lu - Nanoscale, 2023 - pubs.rsc.org
Excitonic complexes, bound states of electrons and holes, provide a promising platform in
monolayer transition-metal dichalcogenide (TMDC) semiconductors for investigating diverse …

Momentum-Dependent Oscillator Strength Crossover of Excitons and Plasmons in Two-Dimensional PtSe2

J Hong, MK Svendsen, M Koshino, T Pichler, H Xu… - ACS …, 2022 - ACS Publications
The 1T-phase layered PtX2 chalcogenide has attracted widespread interest due to its
thickness dependent metal–semiconductor transition driven by strong interlayer coupling …

Essential role of momentum-forbidden dark excitons in the energy transfer responses of monolayer transition-metal dichalcogenides

JD Lin, PY Lo, GH Peng, WH Li, SY Huang… - npj 2D Materials and …, 2023 - nature.com
We present a theoretical investigation of exciton-mediated Förster resonant energy transfers
(FRET's) from photoexcited quantum dots (QD's) to transition-metal dichalcogenide …

Signatures of valley drift in the diversified band dispersions of bright, gray, and dark excitons in MoS2 monolayers under uni-axial strains

CH Shih, GH Peng, PY Lo, WH Li, ML Xu… - arXiv preprint arXiv …, 2024 - arxiv.org
We present a comprehensive theoretical investigation of the strain-modulated excitonic
properties of uni-axially strained transition-metal dichalcogenide monolayers (TMD-MLs) by …

Twisted-light-induced exciton wave packets in transition-metal dichalcogenide monolayers

GH Peng, OJG Sanchez, WH Li, PY Lo… - arXiv preprint arXiv …, 2022 - arxiv.org
We present a comprehensive theoretical investigation of the photo-generated excitons in
transition-metal dichalcogenide monolayers (TMD-ML's) by Laguerre-Gaussian beams, a …