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arXiv · 2601.05900

High-Energy Interlayer Exciton Ensembles in MoSe$_2$/WSe$_2$ Heterostructures by Laguerre-Gaussian Excitation

Mirco Troue·Johannes Figueiredo·Gabriel Mittermair·Jonas Kiemle·Sebastian Loy·Hendrik Lambers·Takashi Taniguchi·Kenji Watanabe·Ursula Wurstbauer·Alexander W. Holleitner
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Abstract

We reveal the higher energetic luminescence part of interlayer exciton ensembles in MoSe$_2$/WSe$_2$ heterostructures upon excitation by an optical Laguerre-Gaussian mode. The excitation is achieved with the help of a spatial light modulator giving rise to a ring-shaped distribution of interlayer excitons. A hyperspectral analysis of the exciton photoluminescence suggests that the excitation scheme allows the accumulation of high-energetic excitons in the rings' center. We discuss the mechanisms leading to such a distribution, including exciton-exciton interaction, phase-space filling, and an incomplete thermalization.

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Mirco Troue, Johannes Figueiredo, Gabriel Mittermair, Jonas Kiemle, Sebastian Loy, Hendrik Lambers, Takashi Taniguchi, Kenji Watanabe, Ursula Wurstbauer, Alexander W. Holleitner. 2026-01-09. High-Energy Interlayer Exciton Ensembles in MoSe$_2$/WSe$_2$ Heterostructures by Laguerre-Gaussian Excitation. https://doi.org/10.1088/2053-1583%2Faea31d

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