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physics.optics2026
Ultrafast excitation of Bloch plasmon polaritons in hyperbolic metamaterials with an extreme ultra-violet transient grating
Tlek Tapani, Hannes Kempf, Matteo Pancaldi +14
Manipulating materials properties with light drives advances in materials science and photonics. Hyperbolic metamaterials are promising candidates as next-generation quantum optica…
physics.optics2025
Polarization conversion using hybrid near-zero and high-index metamaterials
Ben Johns, Hannes Kempf, Lakshmi Das +2
Near-zero-refractive index materials display unique optical properties such as perfect transmission through distorted waveguides, cloaking, and inhibited diffraction. Compared to c…
physics.optics2023
Few-femtosecond phase-sensitive detection of infrared electric fields with a third-order nonlinearity
Hannes Kempf, Philipp Sulzer, Andreas Liehl +2
Measuring an electric field waveform beyond radio frequencies is often accomplished via a second-order nonlinear interaction with a laser pulse shorter than half of the field's osc…