scholarly journals Quantifying photoinduced carriers transport in exciton–polariton coupling of MoS2 monolayers

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Min-Wen Yu ◽  
Satoshi Ishii ◽  
Shisheng Li ◽  
Ji-Ren Ku ◽  
Jhen-Hong Yang ◽  
...  
Keyword(s):  
Electronic Energy ◽  
Plasmonic Nanostructures ◽  
Transition Metal Dichalcogenide ◽  
Metallic Nanoparticle ◽  
Rabi Splitting ◽  
One Dimensional ◽  
Induced Dipole ◽  
Mos2 Monolayers ◽  
Plasmon Polaritons ◽  
Significant Attention

AbstractExciton–polariton coupling between transition metal dichalcogenide (TMD) monolayer and plasmonic nanostructures generates additional states that are rich in physics, gaining significant attention in recent years. In exciton–polariton coupling, the understanding of electronic-energy exchange in Rabi splitting is critical. The typical structures that have been adopted to study the coupling are “TMD monolayers embedded in a metallic-nanoparticle-on-mirror (NPoM) system.” However, the exciton orientations are not parallel to the induced dipole direction of the NPoM system, which leads to inefficient coupling. Our proposed one-dimensional plasmonic nanogrooves (NGs) can align the MoS2 monolayers’ exciton orientation and plasmon polaritons in parallel, which addresses the aforementioned issue. In addition, we clearly reveal the maximum surface potential (SP) change on intermediate coupled sample by the photo-excitation caused by the carrier rearrangement. As a result, a significant Rabi splitting (65 meV) at room temperature is demonstrated. Furthermore, we attribute the photoluminescence enhancement to the parallel exciton–polariton interactions.

scholarly journals Surface plasmon polariton–enhanced photoluminescence of monolayer MoS2 on suspended periodic metallic structures

Nanophotonics ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 975-982
Author(s):  
Huanhuan Su ◽  
Shan Wu ◽  
Yuhan Yang ◽  
Qing Leng ◽  
Lei Huang ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polariton ◽  
Plasmonic Nanostructures ◽  
Metallic Nanoparticle ◽  
Systematic Analysis ◽  
Excitation Rate ◽  
Matter Interaction ◽  
Light Matter Interaction ◽  
Plasmon Polariton ◽  
Plasmonic Effects

AbstractPlasmonic nanostructures have garnered tremendous interest in enhanced light–matter interaction because of their unique capability of extreme field confinement in nanoscale, especially beneficial for boosting the photoluminescence (PL) signals of weak light–matter interaction materials such as transition metal dichalcogenides atomic crystals. Here we report the surface plasmon polariton (SPP)-assisted PL enhancement of MoS2 monolayer via a suspended periodic metallic (SPM) structure. Without involving metallic nanoparticle–based plasmonic geometries, the SPM structure can enable more than two orders of magnitude PL enhancement. Systematic analysis unravels the underlying physics of the pronounced enhancement to two primary plasmonic effects: concentrated local field of SPP enabled excitation rate increment (45.2) as well as the quantum yield amplification (5.4 times) by the SPM nanostructure, overwhelming most of the nanoparticle-based geometries reported thus far. Our results provide a powerful way to boost two-dimensional exciton emission by plasmonic effects which may shed light on the on-chip photonic integration of 2D materials.

scholarly journals Plasmon-excitonic polaritons in metal-semiconductor nanostructures with quantum wells

2018 ◽  
Vol 52 (5) ◽  
pp. 502
Author(s):  
V.A. Kosobukin
Keyword(s):  
Quantum Well ◽  
Quantum Wells ◽  
Semiconductor Nanostructures ◽  
Bragg Diffraction ◽  
Rabi Splitting ◽  
One Dimensional ◽  
Exciton Coupling ◽  
Optical Reflection ◽  
Reflectivity Spectra ◽  
Bragg Structures

AbstractA theory of plasmon-exciton coupling and its spectroscopy is developed for metal-semiconductor nanostructures. Considered as a model is a periodic superlattice with cells consisting of a quantum well and a layer of metal nanoparticles. The problem is solved self-consistently using the electrodynamic Green’s functions taking account of resonant polarization. Coulomb plasmon-exciton interaction is associated with the dipole surface plasmons of particles and their image charges due to excitonic polarization of neighboring quantum well. Optical reflection spectra are numerically investigated for superlattices with GaAs/AlGaAs quantum wells and silver nanoparticles. Superradiant regime caused by one-dimensional Bragg diffraction is studied for plasmonic, excitonic and plasmon-excitonic polaritons depending on the number of supercells. The plasmon-excitonic Rabi splitting is shown to occur in reflectivity spectra of resonant Bragg structures.

scholarly journals Author Correction: Excitons in strain-induced one-dimensional moiré potentials at transition metal dichalcogenide heterojunctions

2020 ◽  
Vol 19 (10) ◽  
pp. 1124-1124 ◽  
Author(s):  
Yusong Bai ◽  
Lin Zhou ◽  
Jue Wang ◽  
Wenjing Wu ◽  
Leo J. McGilly ◽  
...  
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenide ◽  
One Dimensional

scholarly journals Post-synthesis Tellurium Doping Induced Mirror Twin Boundaries in Monolayer Molybdenum Disulfide

2020 ◽  
Vol 10 (14) ◽  
pp. 4758
Author(s):  
Xujing Ji ◽  
Manjunath Nallappagari Krishnamurthy ◽  
Danhui Lv ◽  
Jixue Li ◽  
Chuanhong Jin
Keyword(s):  
Dark Field ◽  
High Ratio ◽  
Chalcogen Atom ◽  
Twin Boundaries ◽  
One Dimensional ◽  
Annular Dark Field ◽  
Mos2 Monolayers ◽  
Post Synthesis ◽  
Transition Electron ◽  
Tellurium Doping

Mirror twin boundaries (MTBs) have brought intriguing one-dimensional physics into the host 2D crystal. In this letter, we reported a chalcogen atom exchange route to induce MTBs into as-formed MoS2 monolayers via post-synthesis tellurium doping. Results from annular dark-field scanning transition electron microscope (ADF-STEM) characterizations revealed that tellurium substituted the sulfur sublattices of MoS2 preferentially around the edge areas. A large number of MTBs in a configuration of 4|4P-Te was induced therein. Analysis of the lattice structures around MTBs revealed that such a tellurium-substitution-induced MTB formation is an energy-favored process to reduce the strain upon a high ratio of tellurium doping.

scholarly journals Reflection phase shift of one-dimensional plasmon polaritons in carbon nanotubes

2020 ◽  
Vol 101 (4) ◽  
Author(s):  
Xingdong Luo ◽  
Cheng Hu ◽  
Bosai Lyu ◽  
Liu Yang ◽  
Xianliang Zhou ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Phase Shift ◽  
One Dimensional ◽  
Reflection Phase ◽  
Plasmon Polaritons

scholarly journals Squeezed metallic droplet with tunable Kubo gap and charge injection in transition metal dichalcogenides

2020 ◽  
Vol 117 (12) ◽  
pp. 6362-6369 ◽  
Author(s):  
Jiaren Yuan ◽  
Yuanping Chen ◽  
Yuee Xie ◽  
Xiaoyu Zhang ◽  
Dewei Rao ◽  
...  
Keyword(s):  
Transition Metal ◽  
Electron Tunneling ◽  
Energy Levels ◽  
Photon Emission ◽  
Transition Metal Dichalcogenides ◽  
Three Dimensional ◽  
Electronic Energy ◽  
Transition Metal Dichalcogenide ◽  
Metallic Droplet ◽  
Electronic Energy Levels

Shrinking the size of a bulk metal into nanoscale leads to the discreteness of electronic energy levels, the so-called Kubo gap δ. Renormalization of the electronic properties with a tunable and size-dependent δ renders fascinating photon emission and electron tunneling. In contrast with usual three-dimensional (3D) metal clusters, here we demonstrate that Kubo gap δ can be achieved with a two-dimensional (2D) metallic transition metal dichalcogenide (i.e., 1T′-phase MoTe2) nanocluster embedded in a semiconducting polymorph (i.e., 1H-phase MoTe2). Such a 1T′/1H MoTe2nanodomain resembles a 3D metallic droplet squeezed in a 2D space which shows a strong polarization catastrophe while simultaneously maintaining its bond integrity, which is absent in traditional δ-gapped 3D clusters. The weak screening of the host 2D MoTe2leads to photon emission of such pseudometallic systems and a ballistic injection of carriers in the 1T′/1H/1T′ homojunctions which may find applications in sensors and 2D reconfigurable devices.

Sign in / Sign up

Export Citation Format

Share Document