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Meeting 2027 TMS Annual Meeting & Exhibition
Symposium 2D Materials – Preparation, Properties, Modeling & Applications
Presentation Title Orientation-Dependent Excitonic Coupling and Purcell Enhancement in MoOCl₂-TMDC Heterostructures
Author(s) Ryan Youngjae Manley, Abhishek Bharatbhai Solanki, Andres Eduardo Llacsahuanga Allcca, Mohan Bikram Neupane, Karthik Pagadala, Arnab Banerjee, Vladimir M Shalaev, Alexandra Boltasseva
On-Site Speaker (Planned) Ryan Youngjae Manley
Abstract Scope Highly anisotropic van der Waals materials offer a versatile platform for tailoring light-matter interactions at the nanoscale. Molybdenum oxychloride (MoOCl₂) has emerged as a uniquely suited natural van der Waals crystal, supporting low-loss, in-plane hyperbolic plasmon polaritons across the visible and near-infrared regimes. In this work, we investigate the coupling dynamics between these hyperbolic modes in chemical vapor transport (CVT) grown MoOCl₂ and excitonic states in adjacent transition metal dichalcogenide (TMDC) monolayers. Utilizing near-field optical mapping alongside polarization-resolved, low-temperature photoluminescence spectroscopy, we exploit the orthogonal metallic and dielectric axes of the MoOCl₂ lattice to probe orientation-dependent emission and localized exciton-exciton dynamics. Furthermore, we investigate how this built-in hyperbolic cavity drives Purcell enhancement, exploring its potential to selectively modulate emission yields and lifetimes. Ultimately, demonstrating this strong coupling establishes a framework for tailoring quantum emission that can enable next-generation integrated nanophotonic circuits, polarization-tunable quantum light sources, and valleytronic devices.
Proceedings Inclusion? Planned:
Keywords Electronic Materials, Thin Films and Interfaces, Characterization

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