Media 1: Investigation and control of ultrafast laser-induced isotropic and anisotropic nanoscale-modulated index patterns in bulk fused silica StoianR. MishchikK. ChengG. MauclairC. D’AmicoC. ColombierJ. P. ZamfirescuM. 2013 Originally published in Optical Materials Express on 01 October 2013 (ome-3-10-1755)