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Electrically tunable Rydberg series excitonic and trionic luminescence in monolayer MoTe₂

Biswas, Souvik and Al Balushi, Zakaria Y. and Wong, Joeson and Caffrey, Eoin and Krylyuk, Sergiy and Wu, Pin Chieh and Akbari, Hamidreza and Taniguchi, Takashi and Watanabe, Kenji and Davydov, Albert and Atwater, Harry A. (2021) Electrically tunable Rydberg series excitonic and trionic luminescence in monolayer MoTe₂. In: Low-Dimensional Materials and Devices 2021. Proceedings of SPIE. No.11800. Society of Photo-optical Instrumentation Engineers , Bellingham, WA, Art. No. 118000V. ISBN 9781510644397.

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Non-hydrogenic Rydberg series associated with excitons have been identified in ultraclean monolayer TMDCs. Here, we investigated the radiative properties of the excitonic Rydberg series in monolayer MoTe₂ based devices and the influence of Fermi level position on the same. Using low temperature (4K) photoluminescence measurements, we observed bright emission from the first three states of the excitonic Rydberg series, namely A1s, 2s and 3s. Upon doping on either electron or hole side, oscillator strengths are rapidly transferred to the corresponding trion (charged exciton/attractive polaron) states associated with the aforementioned neutral excitonic resonances. Energy shifts between different states are observed as a function of gate voltage, indicating strong band-structure renormalization. Our work identifies MoTe₂ as a novel platform to realize highly tunable bright light sources or electro-optic modulators in the NIR.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Al Balushi, Zakaria Y.0000-0003-0589-1618
Wong, Joeson0000-0002-6304-7602
Caffrey, Eoin0000-0002-0174-383X
Krylyuk, Sergiy0000-0003-4573-9151
Wu, Pin Chieh0000-0002-5781-9696
Akbari, Hamidreza0000-0002-6073-3885
Taniguchi, Takashi0000-0002-1467-3105
Watanabe, Kenji0000-0003-3701-8119
Davydov, Albert0000-0003-4512-2311
Atwater, Harry A.0000-0001-9435-0201
Alternate Title:Electrically tunable Rydberg series excitonic and trionic luminescence in monolayer MoTe2
Additional Information:© 2021 Society of Photo-Optical Instrumentation Engineers (SPIE).
Series Name:Proceedings of SPIE
Issue or Number:11800
Record Number:CaltechAUTHORS:20210917-183340764
Persistent URL:
Official Citation:Souvik Biswas, Zakaria Y. Al Balushi, Joeson Wong, Eoin Caffrey, Sergiy Krylyuk, Pin Chieh Wu, Hamidreza Akbari, Takashi Taniguchi, Kenji Watanabe, Albert Davydov, and Harry A. Atwater "Electrically tunable Rydberg series excitonic and trionic luminescence in monolayer MoTe2", Proc. SPIE 11800, Low-Dimensional Materials and Devices 2021, 118000V (3 August 2021);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:110938
Deposited By: George Porter
Deposited On:17 Sep 2021 21:01
Last Modified:17 Sep 2021 21:01

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