We experimentally demonstrate and model dark spatial solitons in azo-doped liquid crystals, in the presence of saturation and nonlocality of the effective nonlinearity due to changes in molecular order. The guiding properties of dark solitons are probed with a weak input of different wavelength.
© 2011 Optical Society of America
Original Manuscript: December 14, 2010
Manuscript Accepted: February 22, 2011
Published: April 7, 2011
A. Piccardi, A. Alberucci, N. Tabiryan, and G. Assanto, "Dark nematicons," Opt. Lett. 36, 1356-1358 (2011)