Formation of higher-band dark gap solitons in one dimensional waveguide arrays
Publication date
2010-12
Document type
Research article
Author
Organisational unit
Scopus ID
Pubmed ID
Series or journal
Optics express
Periodical volume
18
Periodical issue
26
First page
27493
Last page
27498
Part of the university bibliography
✅
Abstract
We experimentally observe the formation of spatial dark gap solitons in higher bands in one-dimensional waveguide arrays possessing a saturable defocusing nonlinearity. By using the prism-coupler scheme, pure Floquet-Bloch modes of higher bands are excited and dark gap solitons are formed due to the counteraction of normal diffraction and the defocusing nature of the photovoltaic nonlinearity. The modulation of refractive index induced by the soliton formation is demonstrated by the guidance of a low-power probe beam in the waveguide array sample. Additionally, the phase structure of dark solitons formed in the second band is discussed.
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