Enhanced Emission from Interlayer Excitons Coupled to Plasmonic Gap Cavities
| Autor: | Thinh N. Tran, Zai-Quan Xu, Tieshan Yang, Simon J. U. White, Licheng Xiao, Minh Nguyen, Sejeong Kim, Stefan Strauf, Igor Aharonovich |
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| Rok vydání: | 2021 |
| Předmět: |
0303 health sciences
Materials science Photoluminescence business.industry Exciton Physics::Optics Heterojunction 02 engineering and technology General Chemistry Purcell effect 021001 nanoscience & nanotechnology Biomaterials Condensed Matter::Materials Science 03 medical and health sciences Optoelectronics General Materials Science Nanoscience & Nanotechnology Photonics 0210 nano-technology business Order of magnitude Plasmon Excitation 030304 developmental biology Biotechnology |
| Zdroj: | Small (Weinheim an der Bergstrasse, Germany). 17(45) |
| ISSN: | 1613-6829 |
| Popis: | The emergence of interlayer excitons (IEs) from atomic layered transition metal dichalcogenides (TMDCs) heterostructures has drawn tremendous attention due to their unique and exotic optoelectronic properties. Coupling the IEs into optical cavities provides distinctive electromagnetic environments which plays an important role in controlling multiple optical processes such as optical nonlinear generation or photoluminescence enhancement. Here, the integration of IEs in TMDCs into plasmonic nanocavities based on a nanocube on a metallic mirror is reported. Spectroscopic studies reveal an order of magnitude enhancement of the IE at room temperature and a 5-time enhancement in fluorescence at cryogenic temperatures. Cavity modeling reveals that the enhancement of the emission is attributed to both increased excitation efficiency and Purcell effect from the cavity. The results show a novel method to control the excitonic processes in TMDC heterostructures to build high performance photonics and optoelectronics devices. |
| Databáze: | OpenAIRE |
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