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25 papers · 2 filters
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…
Efficient supercontinuum generation in quadratic nonlinear waveguides without quasi-phase matching
Hairun Guo, Binbin Zhou, Michael Steinert +5
Efficient supercontinuum generation (SCG) requires excitation of solitons at the pump laser wavelength. Quadratic nonlinear waveguides may support an effective self-defocusing nonl…
Image formation properties and inverse imaging problem in aperture based scanning near field optical microscopy
S. Schmidt, A. E. Klein, T. Paul +7
Aperture based scanning near field optical microscopes are important instruments to study light at the nanoscale and to understand the optical functionality of photonic nanostructu…
Goos-Hänchen and Imbert-Fedorov shifts for paraxial X-Waves
Marco Ornigotti, Andrea Aiello, Claudio Conti
We present a theoretical analysis for the \GH and \IF shifts experienced by an X-wave upon reflection from a dielectric interface. We show that the temporal chirp, as well as the b…
Nonlocal effects: relevance for the spontaneous emission rates of quantum emitters coupled to plasmonic structures
Robert Filter, Christoph Bösel, Giuseppe Toscano +2
The spontaneous emission rate of dipole emitters close to plasmonic dimers are theoretically studied within a nonlocal hydrodynamic model. A nonlocal model has to be used since qua…
Cylindrically polarized Bessel-Gauss beams
Daena Madhi, Marco Ornigotti, Andrea Aiello
We present a study of radially and azimuthally polarized Bessel-Gauss beams in both the paraxial and nonparaxial regimes. We discuss the validity of the paraxial approximation and…