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Lett."],"published-print":{"date-parts":[[2026,7,15]]},"abstract":"<jats:p>Photonic Nanojets (PNJ) have demonstrated their interest in many applications where sub-wavelength resolution is required. Initially achieved with dielectric micro-particles, they can now also be realized using a lensed fiber. To study these fiber microlenses, 2D electromagnetic simulations are often used as a simplified model to approximate real 3D cases. We show by rigorous electromagnetic simulation that due to the modal dependency of this light interaction, this approximation has minimal relevance. 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All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.","name":"copyright","label":"Copyright"}]}}