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arXiv · 2504.03264

Silicon nanoantennas for tailoring the optical properties of MoS2 monolayers

Danae Katrisioti·Peter R. Wiecha·Aurélien Cuche·Sotiris Psilodimitrakopoulos·Guilhem Larrieu·Jonas Müller·Vincent Larrey·Bernhard Urbaszek·Xavier Marie·Emmanuel Stratakis·George Kioseoglou·Vincent Paillard·Jean-Marie Poumirol·Ioannis Paradisanos
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Abstract

Silicon-based dielectric nanoantennas provide an effective platform for engineering light-matter interactions in van der Waals semiconductors. Here, we demonstrate near-field coupling between monolayer MoS2 and silicon nanoantennas arranged in hexagonal lattices with tunable geometric parameters, leading to a three-fold enhancement in photoluminescence and an excitation-wavelength-dependent emission that aligns with Mie-resonant modes. Raman spectroscopy reveals an up to 8-fold enhancement in the vibrational modes of MoS2, while second-harmonic generation exhibits a 20 to 30-fold increase in efficiency, closely correlating with the presence of the underlying nanoantennas. Our experiments and simulations quantify the tunable benefits of the near-field interactions, taking into account thin-film interference and strain-induced effects. Our findings present dielectric nanoantennas as a promising platform for tailoring linear and nonlinear optical properties in 2D materials, with potential applications in nanophotonic devices and integrated photonics.

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Danae Katrisioti, Peter R. Wiecha, Aurélien Cuche, Sotiris Psilodimitrakopoulos, Guilhem Larrieu, Jonas Müller, Vincent Larrey, Bernhard Urbaszek, Xavier Marie, Emmanuel Stratakis, George Kioseoglou, Vincent Paillard, Jean-Marie Poumirol, Ioannis Paradisanos. 2025-04-04. Silicon nanoantennas for tailoring the optical properties of MoS2 monolayers. https://doi.org/10.1063/5.0284138

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