Three-Dimensional Light Bullets in Arrays of Waveguides
Stefano Minardi, Falk Eilenberger, Yaroslav V. Kartashov, Alexander Szameit, Ulrich Röpke, Jens Kobelke, Key Schuster, Hartmut Bartelt, Stefan Nolte, Lluis Torner, Falk Lederer, Andreas Tünnermannhttp://academic.research.microsoft.com/io.ashx?type=5&id=27615522&selfId1=0&selfId2=0&maxNumber=12&query=
We report the first experimental observation of 3D-LBs, excited by femtosecond pulses in a system featuring quasi-instantaneous cubic nonlinearity and a periodic, transversally-modulated refractive index. Stringent evidence of the excitation of LBs is based on time-gated images and spectra which perfectly match our numerical simulations. Furthermore, we reveal a novel evolution mechanism forcing the LBs to follow varying dispersion/diffraction conditions, until they leave their existence range and decay.