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Communication Dans Un Congrès Année : 2023

Controlling the luminescence of two-dimensional materials using tunnelling electrons

Résumé

A scanning tunneling microscope (STM) is used to electrically activate the luminescence of two-dimensional (2D) materials within a nanoscale tunnel junction, in order to spatially resolve the variations of the excitation quantum efficiency on the nanometer scale. An optical microscope and spectrometer is used to spatially, angularly, and spectrally resolve the emitted light, in order to investigate the emission processes and identify the involved excitonic species. In this way, we demonstrated the STM-induced generation of neutral and charged excitons in monolayer transition metal dichalcogenides (MoSe2 and WS2) [1,2]. Recently, we showed that the tip and tunneling current of an STM can also be used to control the quantum yields of photoluminescence in 2D semiconductors [3]. References [1] D. Pommier, R. Bretel, L. E. Parra López, F. Fabre, A. Mayne, E. Boer-Duchemin, G. Dujardin, G. Schull, S. Berciaud, E. Le Moal. Physical Review Letters 123, 027402 (2019). [2] R. J. Peña Román, D. Pommier, R. Bretel, L. E. Parra López, E. Lorchat, J. Chaste, A. Ouerghi, S. Le Moal, E. Boer-Duchemin, G. Dujardin, A.G. Borisov, L.F. Zagonel, G. Schull, S. Berciaud, E. Le Moal. Physical Review B 106, 085419 (2022). [3] R. J. Peña Román, R. Bretel, D. Pommier, L. E. Parra López, E. Lorchat, E. Boer-Duchemin, G. Dujardin, A. G. Borisov, L. F. Zagonel, G. Schull, S. Berciaud, E. Le Moal. Nano Letters 22(23), 9244–9251 (2022).

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Dates et versions

hal-04329958 , version 1 (07-12-2023)

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  • HAL Id : hal-04329958 , version 1

Citer

Ricardo Javier Peña Román, Rémi Bretel, Delphine Pommier, Elizabeth Boer-Duchemin, Gérald Dujardin, et al.. Controlling the luminescence of two-dimensional materials using tunnelling electrons. 20th International Conference on Luminescence, ICL’2023, Aug 2023, Paris, France. ⟨hal-04329958⟩
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