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Article Infrared Magnetopolaritons in MoTe 2 Monolayers and Bilayers

Bo Han ; Jamie M. Fitzgerald ; Lukas Lackner ; Roberto Rosati ; Martin Esmann ; Falk Eilenberger ; Takashi Taniguchi SAMURAI ORCID (National Institute for Materials Science) ; Kenji Watanabe SAMURAI ORCID (National Institute for Materials Science) ; Marcin Syperek ; Ermin Malic ; Christian Schneider

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Citation
Bo Han, Jamie M. Fitzgerald, Lukas Lackner, Roberto Rosati, Martin Esmann, Falk Eilenberger, Takashi Taniguchi, Kenji Watanabe, Marcin Syperek, Ermin Malic, Christian Schneider. Infrared Magnetopolaritons in MoTe 2 Monolayers and Bilayers. Physical Review Letters. 2025, 134 (7), 076902. https://doi.org/10.1103/physrevlett.134.076902

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(abstract)

MoTe2 monolayers and bilayers are unique within the family of van-der-Waals materials since they pave the way towards atomically thin infrared light-matter quantum interfaces, potentially reaching the important telecommunication windows. Here, we report emergent exciton-polaritons based on MoTe2 monolayer and bilayer in a low-temperature open micro-cavity in a joint experiment- theory study. Our experiments clearly evidence both the enhanced oscillator strength and enhanced luminescence of MoTe2 bilayers, signified by a 38 % increase of the Rabi-splitting and a strongly enhanced relaxation of polaritons to low-energy states. The latter is distinct from polaritons in MoTe2 monolayers, which feature a bottleneck-like relaxation inhibition. Both the polaritonic spin- valley locking in monolayers and the spin-layer locking in bilayers are revealed via the Zeeman effect, which we map and control via the light-matter composition of our polaritonic resonances.

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Keyword: magnetopolaritons
, MoTe2, infrared

Date published: 2025-02-20

Publisher: American Physical Society (APS)

Journal:

  • Physical Review Letters (ISSN: 10797114) vol. 134 issue. 7 076902

Funding:

  • World Premier International Research Center Initiative
  • Deutsche Forschungsgemeinschaft Schn1376 11.1
  • Deutsche Forschungsgemeinschaft SFB 1375
  • Deutsche Forschungsgemeinschaft INST184-220
  • Deutsche Forschungsgemeinschaft 524612380
  • Bundesministerium für Bildung und Forschung 16KISQ087K
  • Bundesministerium für Bildung und Forschung 13XP5053A
  • Japan Society for the Promotion of Science 21H05233
  • Japan Society for the Promotion of Science 23H02052
  • Ministry of Education, Culture, Sports, Science and Technology
  • Narodowe Centrum Nauki 2019/35/B/ST5/04308

Manuscript type: Publisher's version (Version of record)

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First published URL: https://doi.org/10.1103/physrevlett.134.076902

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Updated at: 2026-03-10 16:30:17 +0900

Published on MDR: 2026-03-10 13:44:50 +0900

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