Dresden 2026 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 54: 2D Materials IX – Photonic properties and devices

HL 54.6: Talk

Friday, March 13, 2026, 10:45–11:00, POT/0081

All-TMDC nanobeam cavities with embedded MoSe₂ monolayers for enhanced light-matter interaction — •Aris Koulas-Simos¹, Pietro Metuh², Athanasios Paralikis², Kartik Gaur¹, Maximilian Klonz¹, Imad Limame¹, Chirag Palekar¹, Battulga Munkhbat², and Stephan Reitzenstein¹ — ¹Institut für Physik und Astronomie, Technische Universität Berlin, Berlin, Germany — ²Department of Electrical and Photonics Engineering, Technical University of Denmark, Kongens Lyngby, Denmark

All-TMDC photonic structures enable enhanced light-matter interaction by combining high index contrast with atomically thin excitonic materials in a homogeneous platform [1]. Recent theoretical work [2] shows that all-TMDC nanostructures can support very large Purcell factors, highlighting their potential for nanoscale lasing. We realize WS₂ nanobeam cavities with a MoSe₂ monolayer embedded inside the dielectric cavity for improved field-exciton coupling compared to the conventional evanescent coupling schemes. Simulations predict a cavity mode at 766 nm with Q≈4·10³, a mode volume of approximately 2.6 (λ/n)³, and a confinement factor Γ≈ 0.8%. Cross-polarized reflectivity at room temperature reveals resonances between 725 and 760 nm with Q-factor values of 100-300, and low-temperature photoluminescence confirms coupling of the MoSe₂ monolayer to the cavity mode. These results establish a monolithic TMDC platform for future all-TMDC nanolasers and quantum emitters.

[1] B. Munkhbat et al., Laser Photon. Rev. 17, 2200057 (2023) [2] F. Binkowski, A. Koulas-Simos et al., arXiv:2508.05333 (2025), accepted

Keywords: Transition metal dichalcogenides; nanolasers; monolayers; enhanced light matter interaction