Presentation finds low-loss hyperbolic plasmon polaritons and ultrafast OAM modulation techniques, indicating transformative applications for photonic technologies.
Controlling light at the nanoscale and ultrafast timescales is essential for advancing photonic technologies, with applications spanning imaging, optoelectronics, and quantum information science. This presentation explores two cutting-edge developments in light-matter interaction: (1) the demonstration of low-loss, in-plane hyperbolic plasmon polaritons (HPPs) in the visible and near-infrared using the natural van der Waals crystal MoOCl₂ and (2) the ultrafast modulation of light's orbital angular momentum (OAM) via a novel Fourier space-time transformation. Together, these advances illustrate the transformative potential of nanoscale and ultrafast light engineering, paving the way for next-generation photonic devices and applications. [1] G. Venturi, A. Mancini, N. Melchioni, S. Chiodini, A. Ambrosio. Visible-frequency hyperbolic plasmon polaritons in a natural van der Waals crystal, Nature Communications 15:9727 (2024) [2] M. de Oliveira, A. Ambrosio. Subcycle modulation of light's orbital angular momentum via a Fourier space-time transformation, Science Advances 11, eadr6678 (2025)
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António Francisco Ambrósio (2025) studied this question.
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