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Ultrafast Dynamics of Bloch Surface Wave Polaritons in Large-Area 2D Semiconductor Monolayers at Room Temperature.
Liu, Bin; Michail, Evripidis; He, Guiying; Sfeir, Matthew Y; Forrest, Stephen R.
Afiliación
  • Liu B; Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI, 48109, USA.
  • Michail E; Department of Physics, Graduate Center, City University of New York, New York, NY, 10016, USA.
  • He G; Photonics Initiative, Advanced Science Research Center, City University of New York, New York, NY, 10031, USA.
  • Sfeir MY; Department of Physics, Graduate Center, City University of New York, New York, NY, 10016, USA.
  • Forrest SR; Photonics Initiative, Advanced Science Research Center, City University of New York, New York, NY, 10031, USA.
Adv Mater ; 36(35): e2404286, 2024 Aug.
Article en En | MEDLINE | ID: mdl-38924714
ABSTRACT
The dynamics of strongly coupled polariton systems integrated with 2D transition metal dichalcogenides (TMDs) is key to enabling efficient coherent processes and achieving high-performance TMD-based polaritonic devices, such as ultralow-threshold polariton lasers and ultrafast optical switches. However, there has been a lack of a comprehensive understanding of the excited state dynamics in TMD-based polariton systems. In this work, ultrafast pump-probe optical spectroscopy is used to investigate the room temperature dynamics of the polariton systems consisting of TMD monolayer excitons strongly coupled with Bloch surface waves (BSWs) supported by all-dielectric photonic structures. The transient response is found for both above-exciton energy pumping and polariton-resonant pumping. The excited state population and ultrafast coherent coupling of the exciton reservoir and lower polariton (LP) branch are observed for resonant pumping. Moreover, it is found that the transient response of the LP first decays on a short-time scale of 0.15-0.25 ps compared to the calculated intrinsic lifetime of 0.11-0.20 ps, and is followed by a longer decay (>100 ps) due to the dynamical evolution of the exciton reservoir. The results provide a fundamental understanding of the dynamics of TMD-based polariton systems while showing the potential for achieving efficient coherent optical processes for device applications.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Mater Asunto de la revista: BIOFISICA / QUIMICA Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Mater Asunto de la revista: BIOFISICA / QUIMICA Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Alemania