Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session T00: Poster Session III (1pm-4pm PST)
1:00 PM,
Thursday, March 9, 2023
Room: Exhibit Hall (Forum Ballroom)
Sponsoring
Unit:
APS
Abstract: T00.00247 : Exciton-polariton properties in hBN-encapsulated transition metal dichalcogenides
Presenter:
Ho Seung Lee
(Korea University)
Authors:
Ho Seung Lee
(Korea University)
Junghyun Sung
(KOREA UNIVERSITY)
Su Hyun Gong
(Korea University)
Collaboration:
Department of Physics, Korea University
Here, we demonstrated improved EPs properties in TMDCs with hexagonal-boron nitride (hBN). By encapsulating WS2 with atomically thin hBN, WS2 was isolated from charge disorders at the surface of substrate and maintained its flatness. We observed the presence of hBN reduces the inhomogeneous linewidth of exciton in the photoluminescence spectra. The reduced linewidth indicates a stronger excitonic resonance, improving properties of EPs. Therefore, to compare propagation properties of EPs depending on the presence of hBN, the spectra of EPs scattered at the sample edge were investigated as a function of the propagation length. The hBN enables us to study intrinsic optical properties of the polariton in TMDCs in details. The enhanced quality of EPs will contribute to further studies in photonics and optoelectronic devices.
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