Details

Autor(en) / Beteiligte

• Eilenberger, Falk
• Minardi, Stefano
• Szameit, Alexander
• Röpke, Ulrich
• Kobelke, Jens
• Schuster, Kay
• Bartelt, Hartmut
• Nolte, Stefan
• Tünnermann, Andreas
• Pertsch, Thomas

Titel

Light bullets in waveguide arrays: spacetime-coupling, spectral symmetry breaking and superluminal decay [Invited]

Ist Teil von

• Optics express, 2011-11, Vol.19 (23), p.23171-23187

Ort / Verlag

United States

Erscheinungsjahr

2011

Quelle

Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals

Beschreibungen/Notizen

• We investigate the effects of the space-time coupling (STC) on the nonlinear formation and propagation of Light Bullets, spatiotemporal solitons in which dispersion and diffraction along all dimensions are balanced by nonlinearity, through periodic media with a weak transverse modulation of the refractive index, i.e. waveguide arrays. The STC arises from wavelength dependence of the strength of inter-waveguide coupling and can be tuned by variation of the array geometry. We show experimentally and numerically that the STC breaks the spectral symmetry of Light Bullets to a considerable degree and modifies their group velocity, leading to superluminal propagation when the Light Bullets decay.