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Moiré Photonic Crystals: from Fabric to Magic
Marion Lavignac, Hai Son Nguyen, Xavier Letartre +2
Moiré patterns have recently become a very active field in nanophotonics. Those structures exhibit novel photonic properties unattainable with traditional photonic crystals. Especi…
Exploring phase sensitivity and limit of detection near the critical coupling of metasurfaces and its phase singularity
L. Berguiga, T. Girerd, X. Letartre +4
It is commonly accepted that phase singularities in refractive index sensors can provide highly sensitive detection. To address this issue, we studied the phase sensitivity and the…
A formalism for giant Goos-Hänchen shift in metasurface sensors with phase singularity
Lotfi Berguiga, Sébastien Cueff, Lydie Ferrier +4
The Goos-Hänchen (GH) shift becomes giant in resonant photonic structures, making it promising for refractive index sensors with ultimate sensitivities. We provide here a complete…
Shaping Bulk Fermi Arcs in the Momentum Space of Photonic Crystal Slabs
Luigi Frau, Simone Zanotti, Lydie Ferrier +2
Exceptional points (EPs) are special spectral degeneracies of non-Hermitian operators: at the EP, the complex eigenvalues coalesce, i.e., they become degenerate in both their real…
Tailoring Flatband Dispersion in Bilayer Moiré Photonic Crystals
Chirine Saadi, Sébastien Cueff, Lydie Ferrier +6
In this study, we experimentally investigate the photonic dispersion in one-dimensional moiré structures formed by stacking two photonic crystal slabs with slightly different perio…
How many supercells are required to achieve unconventional light confinement effects in moiré photonic lattices?
Chirine Saadi, Hai Son Nguyen, Sébastien Cueff +3
Moiré structures are receiving increasing attention in nanophotonics as they support intriguing optical phenomena. In the so-called "magic configuration", one-dimensional moirés gi…
Band Inversion Flips the Winding of Bound States in the Continuum
Paul Bouteyre, Dung Xuan Nguyen, Loïc Malgrey +10
Bound states in the continuum (BICs) in photonic slabs and metasurfaces appear as polarization singularities in momentum space, characterized by an integer winding number. This win…
Unveiling the Enhancement of Spontaneous Emission at Exceptional Points
Lydie Ferrier, Paul Bouteyre, Adi Pick +10
Exceptional points (EPs), singularities of non-Hermitian physics where complex spectral resonances degenerate, are one of the most exotic features of nonequilibrium open systems wi…
Ultimate Phase Sensitivity in Surface Plasmon Resonance Sensors by Tuning Critical Coupling with Phase Change Materials
Lotfi Berguiga, Lydie Ferrier, Cécile Jamois +3
Plasmonic sensing is an established technology for real-time biomedical diagnostics and air-quality monitoring. While intensity and wavelength tracking are the most commonly used i…
Tamm plasmon Photonic Crystals : from Bandgap Engineering to Defect Cavity
Lydie Ferrier, Hai Son Nguyen, Cécile Jamois +4
We report for the first time the bandgap engineering of Tamm plasmon photonic crystals - Tamm plasmon structures of which the metalic layer is periodically patterned into lattice o…