Journal
SMALL
Volume 17, Issue 45, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202103994
Keywords
transition metal dichalcogenide; heterostructures; interlayer excitons; plasmonic gap cavities
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Funding
- Australian Research Council [CE200100010]
- Asian Office of Aerospace Research Development [FA2386-20-1-4014]
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The coupling of interlayer excitons (IEs) into optical cavities provides unique electromagnetic environments for controlling various optical processes. Experimental results show significant enhancements in optical performance by integrating IEs into plasmonic nanocavities at different temperatures.
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.
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