Figure 5

Backscattered electron image of the waveguide written at 90Â nJ and 1,000Â mm/min and its corresponding spatially resolved compositional map of Ge, Bi and O.

Backscattered electron image of the waveguide written at 90Â nJ and 1,000Â mm/min and its corresponding spatially resolved compositional map of Ge, Bi and O.