Publication date: 15th May 2025
Plasmonic excitations in nanomaterials enable strong light-matter coupling, electromagnetic field enhancement, and novel energy transfer pathways. While localized surface plasmon resonances are well-studied, the controlled manipulation of surface plasmon polaritons (SPPs) in two-dimensional materials presents both fundamental challenges and opportunities for next-generation optical technologies. In this talk, I will demonstrate how polarization-dependent, time-resolved photoemission electron microscopy (PD-TR-PEEM) enables direct visualization of SPP propagation with nanometer spatial and femtosecond temporal resolution in layered 2D materials. Our investigations reveal conventional SPP behavior in transition metal carbides and nitrides (MXenes), while identifying hyperbolic plasmon polaritons (HPPs) with extremely long propagation lengths in the anisotropic layered material MoOCl₂. These HPPs exhibit unique electromagnetic properties including directional propagation and enhanced light confinement not observed in isotropic materials. I will discuss how detailed theoretical and computational modeling of interfacial interactions is critical to describing SPP behavior in these systems and highlight emerging opportunities for exploiting hyperbolic dispersion in applications ranging from advanced sensing to quantum information processing and nanophotonic devices.
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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