Berlin 2024 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 47: 2D Materials: Heterostuctures
HL 47.3: Vortrag
Donnerstag, 21. März 2024, 15:30–15:45, EW 201
Broadband Dielectric Mirrors and Microcavity Configurations for Multimode Coupling with Excitons in TMDC Heterostructures. — •Chirag Palekar1, Bárbara Rosa1, Niels Heermeier1, Ching-Wen Shih1, Imad Limame1, Aris Kaulas-Simos1, Arash Rahimi-Iman2, and Stephan Reitzenstein1 — 1Institute of Solid State Physics, Technische Universität Berlin, D-10623 Berlin, Germany — 2I. Physikalisches Institut and Center for Materials Research, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany
We introduce chirped distributed Bragg reflectors with a broad stopband (>600 nm), spanning visible to near-infrared wavelengths. Our microcavity configurations employ broadband chirped DBRs which consist SiO2 and Si3N4 layers, demonstrating energetically separated cavity resonances. These modes are utilized to investigate the light-matter interactions with intra- and inter-layer excitons of transition metal dichalcogenide bilayer heterostructures (TMDC HSs). Additionally, our chirped microcavity systems shows cavity-coupled emission of energetically separated intra and interlayer excitons in a WSe2/MoSe2 heterostructure. The microcavity, combined with TMDC HSs, holds promise for studying moiré physics and advancing light-matter interactions in TMDC-based devices. Overall, our approach provides a versatile tool for future studies of spectrally distant and confined excitons in any active medium which paves the way for various applications by enabling precise control and manipulation of excitonic interactions utilizing multimode resonance light-matter interaction.
Keywords: Multimode coupling; Dielectric DBR; Broadband DBR; Interlayer exciton enhancement