REISNER , Mattis

In the vivid domain of topological photonics, microwave setups are a driving force in the experimental study in one or two-dimensional systems. Using small dielectric resonators, sandwiched between two metallic plates, we study complex lattice-like structures, that are essentially described by the coupling strength between the resonances of the...

We present a microwave experimental setup emulating tight-binding systems that is now widely used in the realm of topological photonics. A thorough description of the experimental building blocks is presented, showing the advantages and the limits of this platform. Various experimental realizations are then described, ranging from the selective...

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National audience

The tight-binding model for a chain, where the hopping constants follow a Fibonacci sequence, predicts multifractality in the spectrum and wave functions. Experimentally, we realize this model by chains of small dielectric resonators with a high refractive index (ε_r≈45) of cylindrical form that exhibit evanescent coupling. We show that the...

International audience

Abstract Coherent perfect absorption is one of the possibilities to get high absorption but typically suffers from being a resonant phenomena, i.e., efficient absorption only in a local frequency range. Additionally, if applied in high power applications, the understanding of the interplay of non-linearities and coherent perfect absorption is...

International audience

Shaping single-mode operation in high-power fibers requires a precise knowledge of the gain-medium optical properties. This requires precise measurements of the refractive index differences (Δn) between the core and the cladding of the fiber. We exploit a quantum optical method based on low-coherence Hong-Ou-Mandel interferometry to perform...