Acoustically driven Stark effect in transition metal dichalcogenide monolayers
Diego Scolfaro, Matheus Finamor, Luca O. Trinchão, Bárbara L. T. Rosa, Andrey Chaves, Paulo V. Santos, Fernando Iikawa and Odilon D. D. Couto Jr.
ARTIGO
Inglês
Agradecimentos: We thank S. Rauwerdink, W. Seidel, and A. Tahraoui for the fabrication of the FEUDT transducers, M. Tanabe for the technical support during the spectroscopy measurements, and R. Fandan for providing information on the experimentally measured unidirectionality of FEUDT devices. We...
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Agradecimentos: We thank S. Rauwerdink, W. Seidel, and A. Tahraoui for the fabrication of the FEUDT transducers, M. Tanabe for the technical support during the spectroscopy measurements, and R. Fandan for providing information on the experimentally measured unidirectionality of FEUDT devices. We thank E. C. Bortolucci and the Center of Semiconductor Components and Nanotechnologies (CCSNano) from the University of Campinas as well as M. V. P. dos Santos and the multiuser laboratory (LAMULT) from the Gleb Wataghin Institute of Physics. The authors gratefully acknowledge the financial support from the São Paulo Research Foundation (FAPESP) (grants 2012/11382-9, 2018/18091-6, 2019/13654-5) and Ministry of Science, Technology, and Innovation as well as the National Council for Scientific and Technological Development (CNPq) (grants 62576/2017-0, 306107/2019-8)
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Abstract: The Stark effect is one of the most efficient mechanisms to manipulate many-body states in nanostructured systems. In mono- and few-layer transition metal dichalcogenides, it has been successfully induced by optical and electric field means. Here, we tune the optical emission energies and...
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Abstract: The Stark effect is one of the most efficient mechanisms to manipulate many-body states in nanostructured systems. In mono- and few-layer transition metal dichalcogenides, it has been successfully induced by optical and electric field means. Here, we tune the optical emission energies and dissociate excitonic states in MoSe2 monolayers employing the 220 MHz in-plane piezoelectric field carried by surface acoustic waves. We transfer the monolayers to high dielectric constant piezoelectric substrates, where the neutral exciton binding energy is reduced, allowing us to efficiently quench (above 90%) and red-shift the excitonic optical emissions. A model for the acoustically induced Stark effect yields neutral exciton and trion in-plane polarizabilities of 530 and 630 × 10–5 meV/(kV/cm)2, respectively, which are considerably larger than those reported for monolayers encapsulated in hexagonal boron nitride. Large in-plane polarizabilities are an attractive ingredient to manipulate and modulate multiexciton interactions in two-dimensional semiconductor nanostructures for optoelectronic applications
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FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP
2012/11382-9; 2018/18091-6; 2019/13654-5
CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ
62576/2017-0; 306107/2019-8
Aberto
DOI: https://doi.org/10.1021/acsnano.1c06854
Texto completo: https://pubs.acs.org/doi/10.1021/acsnano.1c06854
Acoustically driven Stark effect in transition metal dichalcogenide monolayers
Diego Scolfaro, Matheus Finamor, Luca O. Trinchão, Bárbara L. T. Rosa, Andrey Chaves, Paulo V. Santos, Fernando Iikawa and Odilon D. D. Couto Jr.
Acoustically driven Stark effect in transition metal dichalcogenide monolayers
Diego Scolfaro, Matheus Finamor, Luca O. Trinchão, Bárbara L. T. Rosa, Andrey Chaves, Paulo V. Santos, Fernando Iikawa and Odilon D. D. Couto Jr.
Fontes
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ACS nano Vol. 15, n. 9 (Sept., 2021), p. 15371-15380 |