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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
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Enhanced Emission from Interlayer Excitons Coupled to Plasmonic Gap Cavities.
Thinh N Tran1, Sejeong Kim2, Simon J U White1
1School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo, New South Wales, 2007, Australia.
Small (Weinheim an Der Bergstrasse, Germany)
|October 4, 2021
Summary
Interlayer excitons (IEs) in transition metal dichalcogenides (TMDCs) were enhanced using plasmonic nanocavities. This integration boosts optoelectronic properties for advanced photonics and devices.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanophotonics
Background:
- Interlayer excitons (IEs) in transition metal dichalcogenides (TMDCs) exhibit unique optoelectronic properties.
- Coupling IEs into optical cavities modifies electromagnetic environments, influencing optical processes like photoluminescence.
- TMDCs are promising for next-generation optoelectronic applications.
Purpose of the Study:
- To integrate IEs in TMDCs into plasmonic nanocavities.
- To investigate the effect of plasmonic nanocavities on IE emission and fluorescence.
- To demonstrate a novel method for controlling excitonic processes in TMDC heterostructures.
Main Methods:
- Fabrication of plasmonic nanocavities using a nanocube on a metallic mirror.
- Integration of TMDC heterostructures with IEs into the nanocavities.
- Spectroscopic studies (photoluminescence) at room and cryogenic temperatures.
- Cavity modeling to understand enhancement mechanisms.
Main Results:
- An order of magnitude enhancement of IE emission at room temperature.
- A 5-time enhancement in fluorescence at cryogenic temperatures.
- Attribution of enhancement to increased excitation efficiency and Purcell effect.
Conclusions:
- Plasmonic nanocavities significantly enhance IE emission in TMDCs.
- The developed method offers control over excitonic processes.
- This approach enables the development of high-performance photonics and optoelectronics devices.
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