Microwave limiters implemented by coupled dielectric resonators based on a topological defect mode and CT-symmetry breaking

Reisner, Mattis; Mortessagne, Fabrice; Makri, Eleana; Kuhl, Ulrich

doi:10.48550/arxiv.1910.09203

Cited by 1 publication

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“…As the resonance frequency is below the cut-off frequency of the first TE mode defined by the two plates the adjacent resonators are coupled through evanescent wave components leading to an approximately exponential decay of the coupling strength t with the distance between the resonators [25]. The system is excited via a loop antenna fixed in the movable top plate thus allowing to scan spatially the magnetic field B z , which is the only magnetic field component for this mode [37]. From the reflection measurements performed by a vector network analyzer (ZVA 24 from Rohde & Schwarz) the local density of states can be extracted (for details see Ref.…”

Section: A Experimentsmentioning

confidence: 99%

Observation of supersymmetric pseudo-Landau levels in strained microwave graphene

Bellec,

Poli,

Kuhl

et al. 2020

Preprint

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Using an array of coupled microwave resonators arranged in a deformed honeycomb lattice, we experimentally observe the formation of pseudo-Landau levels in the whole crossover from vanishing to large pseudomagnetic field strength. This is achieved by utilizing an adaptable set-up in a geometry that is compatible with the pseudo-Landau levels at all field strengths. The adopted approach enables us to observe fully formed flat-band pseudo-Landau levels spectrally as sharp peaks in the photonic density of states, and image the associated wavefunctions spatially, where we provide clear evidence for a characteristic nodal structure reflecting the previously elusive supersymmetry in the underlying low-energy theory. In particular, we resolve the full sublattice polarization of the anomalous 0th pseudo-Landau level, which reveals a deep connection to zigzag edge states in the unstrained case.

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Section: A Experimentsmentioning

confidence: 99%