51 citations · 57 across the 11 of their papers we have counts for
11 papers
Machine-learning-enabled methodology for the ab-initio simulations of sub-m-wide nanoribbons
Guan-Hao Peng, Chin-Jui Huang, Wen-Teng Yang +1
Simulation of mesoscopic nanostructures is a central challenge in condensed matter physics and device applications. First-principles methods provide accurate electronic structures…
Signatures of valley drift in the diversified band dispersions of bright, gray, and dark excitons in MoS2 monolayers under uni-axial strains
Ching-Hung Shih, Guan-Hao Peng, Ping-Yuan Lo +4
We present a comprehensive theoretical investigation of the strain-modulated excitonic properties of uni-axially strained transition-metal dichalcogenide monolayers (TMD-MLs) by so…
Efficient light upconversion via resonant exciton-exciton annihilation of dark excitons in few-layer transition metal dichalcogenides
Yi-Hsun Chen, Ping-Yuan Lo, Kyle W. Boschen +15
In this work, we report a pronounced light upconversion in few-layer transition metal dichalcogenides. Our joint theory-experiment study attributes the upconversion photoluminescen…
Enhanced photo-excitation and angular-momentum imprint of gray excitons in WSe monolayers by spin-orbit-coupled vector vortex beams
Oscar Javier Gomez Sanchez, Guan-Hao Peng, Wei-Hua Li +3
A light beam can be spatially structured in the complex amplitude to possess orbital angular momentum (OAM), which introduces a new degree of freedom alongside the intrinsic spin a…
The key role of non-local screening in the environment-insensitive exciton fine structures of transition-metal dichalcogenide monolayers
Wei-Hua Li, Jhen-Dong Lin, Ping-Yuan Lo +4
In this work, we present a comprehensive theoretical and computational investigation of exciton fine structures of WSe-monolayers, one of the best known two-dimensional (2D) tr…
Twisted-light-induced exciton wave packets in transition-metal dichalcogenide monolayers
Guan-Hao Peng, Oscar Javier Gomez Sanchez, Wei-Hua Li +2
We present a comprehensive theoretical investigation of the photo-generated excitons in transition-metal dichalcogenide monolayers (TMD-ML's) by Laguerre-Gaussian beams, a celebrat…
Inherently high valley polarizations of momentum-forbidden dark excitons in transition-metal dichalcogenide monolayers
Ping-Yuan Lo, Guan-Hao Peng, Wei-Hua Li +2
High degree of valley polarization of optically active excitons in transition-metal dichalcogenide monolayers (TMD-MLs) is vital in valley-based photonic applications but known to…
Symmetry governed valley-pseudospin textures of the full-zone excitonic bands of transition-metal dichalcogenide monolayers
Ping-Yuan Lo, Guan-Hao Peng, Wei-Hua Li +2
Preserving a high degree of valley polarization of excitons in photo-excited transition-metal dichalcogenide monolayers (TMD-MLs) is desirable for the valley-based photonic applica…
Twisted-light-revealed Lightlike Exciton Dispersion in Monolayer MoS2
Kristan Bryan Simbulan, Teng-De Huang, Guan-Hao Peng +7
Twisted light carries a well-defined orbital angular momentum (OAM) per photon. The quantum number l of its OAM can be arbitrarily set, making it an excellent light source to reali…
Distinctive signatures of the spin- and momentum-forbidden dark exciton states in the photo-luminescences of strained WSe monolayers under thermalization
Guan-Hao Peng, Ping-Yuan Lo, Wei-Hua Li +5
With the both spin and valley degrees of freedom, the low-lying excitonic spectra of photo-excited transition-metal dichalcogenide monolayers (TMDC-MLs) are featured by rich fine s…
Optimal electro-mechanical control of the excitonic fine structures of droplet epitaxial quantum dots
Shun-Jen Cheng, Yi Yang, Yu-Nien Wu +2
The intrinsic fine structure splittings (FSSs) of the exciton states of semiconductor quantum dots (QDs) are known to be the major obstacle for realizing the QD-based entangled pho…