Spatial solitons in a semiconductor microresonator
  We show experimentally the existence of bright and dark spatial solitons in a passive quantum-well-semiconductor resonator of large Fresnel number. For the wavelength of observation the nonlinearity is mixed absorptive/defocusing. Bright solitons appear more stable than dark ones. 
V. B. Taranenko (1), I. Ganne (2), R. J. Kuszelewicz (2), C. O. Weiss   (1) ((1) PTB, Germany, (2) CNET, France)