Enhanced Emission from Interlayer Excitons Coupled to Plasmonic Gap Cavities
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Kim, Sejeong
White, Simon JU
Minh, Anh Phan Nguyen
Xiao, Licheng
Strauf, Stefan
Yang, Tieshan
Aharonovich, Igor
Xu, Zai-Quan
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Abstract
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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Small
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17
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45
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© 2021. This is the peer reviewed version of the following article: Tran, T. N., Kim, S., White, S. J. U., Nguyen, M. A. P., Xiao, L., Strauf, S., Yang, T., Aharonovich, I., Xu, Z.-Q., Enhanced Emission from Interlayer Excitons Coupled to Plasmonic Gap Cavities. Small 2021, 17, 2103994, which has been published in final form at https://doi.org/10.1002/smll.202103994. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
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Nanomaterials
Nanotechnology
Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Chemistry, Physical
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Tran, TN; Kim, S; White, SJU; Minh, APN; Xiao, L; Strauf, S; Yang, T; Aharonovich, I; Xu, Z-Q, Enhanced Emission from Interlayer Excitons Coupled to Plasmonic Gap Cavities, Small, 2021, 17 (45), pp. 2103994