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Plasmon induced brightening of dark exciton in monolayer WSe2 for quantum optoelectronicsPublished in American Institute of Physics Inc.
2019
DOI: 10.1063/1.5093664
Volume: 114
Issue: 20
In the present work, we report plasmon induced brightening of dark excitons (XD) in Au nanoparticle (Au-NP) coated monolayer (1L) WSe2. We observed one order enhancement in photoluminescence (PL) intensity and surface enhanced Raman scattering in Au-NP/1L-WSe2 at room temperature (RT). Temperature dependent PL measurements showed enhanced PL emission from RT down to 100 K in contrast to reduced PL emission which is generally observed for pristine 1L-WSe2. We attribute this effect to the out-of-plane electric field induced by the scattering from Au-NPs, which results in the out-of-plane dipole moment and spin-flip of conduction band electrons in Au-NP/1L-WSe2, making XD bright. Our approach provides a facile way to harness excitonic properties in low-dimensional semiconductors, offering simple strategies for quantum optoelectronics. © 2019 Author(s).
Topics: Photoluminescence (54)%54% related to the paper, Plasmon (53)%53% related to the paper, Exciton (52)%52% related to the paper and Scattering (51)%51% related to the paper
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Content may be subject to copyright.This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publ... ...This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in [Plasmon induced brightening of dark exciton in monolayer WSe2 for quantum optoelectronics. Applied Physics Letters 114, 20 p201101 (2019)] and may be found at https://doi.org/10.1063/1.5093664.
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About the journal
| Journal | Data powered by TypesetApplied Physics Letters |
|---|---|
| Publisher | Data powered by TypesetAmerican Institute of Physics Inc. |
| ISSN | 00036951 |
| Open Access | No |
Authors (4)
K Lakshmi Ganapathi- High-performance broadband photo-detection in solution-processed ZnO-ZnCr2O4 Nanowalls
- Solution-Processed Transparent CuO Thin Films for Solar-Blind Photodetection
- Plasmon induced brightening of dark exciton in monolayer WSe2 for quantum optoelectronics
- Adaptive Transport in High Performance Ion, Steep Sub-Threshold Slope (SS < 60 mV/dec) MoS2 Transistors
Mamidanna Sri Ramachandra Rao- Enhanced photoluminescence and heterojunction characteristics of pulsed laser deposited ZnO nanostructures
- Zn-vacancy induced violet emission in p-type phosphorus and nitrogen codoped ZnO thin films grown by pulsed laser deposition
- High-performance broadband photo-detection in solution-processed ZnO-ZnCr2O4 Nanowalls
- Special issue on magnetoelectrics and their applications
Ananth Krishnan- Fourier plane imaging of scattering by gold nanoparticles fabricated using thermal stress and application to RI sensing
- Imaging the engineered polarization states of surface plasmon polaritons at visible wavelengths
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- Stain free colorimetric sensors using hybrid mode plasmonic microscopy
Concepts (16)
Electric fields- Excitons
- Gold nanoparticles
- Monolayers
- Plasmons
- Raman scattering
- Surface scattering
- Conduction band electrons
- Electric field induced
- EXCITONIC PROPERTIES
- LOW-DIMENSIONAL SEMICONDUCTORS
- Ordering enhancement
- Photoluminescence intensities
- Surface enhanced raman scattering (sers)
- Temperature dependent
- Selenium compounds
