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Observation of bound states in Lieb photonic lattices
Rodrigo A. Vicencio, Camilo Cantillano, Luis Morales-Inostroza +4
We present the first experimental demonstration of a new type of bound states in the continuum, namely, compacton-like linear states in flat bands lattices. To this end, photonic L…
Observation of supersymmetric scattering in photonic lattices
Matthias Heinrich, Simon Stützer, Mohammad-Ali Miri +3
Supersymmetric (SUSY) optical structures display a number of intriguing properties that can lead to a variety of potential applications, ranging from perfect global phase matching…
Impact of loss on the wave dynamics in photonic waveguide lattices
M. Golshani, S. Weimann, Kh. Jafari +6
We analyze the impact of loss in lattices of coupled optical waveguides and find that in such case, the hopping between adjacent waveguides is necessarily complex. This results not…
Analytical model for waveguide light propagation and applications
Santiago Rojas Rojas, Luis Morales-Inostroza, Uta Naether +6
We study the polarization properties of elliptical femtosecond-laser-written waveguides arrays. A new analytical model is presented to explain the asymmetry of the spatial transver…
Probing topological invariants in the bulk of a non-Hermitian optical system
Julia M. Zeuner, Mikael C. Rechtsman, Yonatan Plotnik +4
Topological insulators are insulating in the bulk but feature conducting states on their surfaces. Standard methods for probing their topological properties largely involve probing…
Light transport in PT-invariant photonic structures with hidden symmetries
M. H. Teimourpour, R. El-Ganainy, A. Eisfeld +2
We introduce a recursive bosonic quantization technique for generating classical PT photonic structures that possess hidden symmetries and higher order exceptional points. We study…
Radially Self-Accelerating Beams
Christian Vetter, Toni Eichelkraut, Marco Ornigotti +2
We report on optical non-paraxial beams that exhibit a self-accelerating behavior in radial direction. Our theory shows that those beams are solutions to the full scalar Helmholtz…
Observation of asymmetric solitons in waveguide arrays with refractive index gradient
Steffen Weimann, Yaroslav V. Kartashov, Victor A. Vysloukh +2
We study light propagation in waveguide arrays made in Kerr nonlinear media with a transverse refractive index gradient, and we find that the presence of the refractive index gradi…
Experimental observation of bulk and edge transport in photonic Lieb lattices
D. Guzman-Silva, C. Mejia-Cortes, M. A. Bandres +6
We analyze the transport of light in the bulk and at the edge of photonic Lieb lattices, whose unique feature is the existence of a flat band representing stationary states in the…
Quasi PT-symmetry in passive photonic lattices
Marco Ornigotti, Alexander Szameit
The concept of quasi-PT symmetry in optical wave guiding system is elaborated by comparing the evolution dynamics of a PT-symmetric directional coupler and a passive directional co…
Supersymmetric mode converters
Matthias Heinrich, Mohammad-Ali Miri, Simon Stützer +4
Originally developed in the context of quantum field theory, the concept of supersymmetry (SUSY) can be used to systematically design a new class of optical structures. In this wor…