Practice details

Corrosion influence. ZnSSe/GaAs laser structure .

See practice details of topography acquisition, ZnSSe/GaAs laser structure.

Some products of the corrosion may be weakly bounded to the surface. Therefore to minimize their damage by AFM probe in contact mode, we applied small error signals for the topography acquisition. (Setpoint values of the vertical deflection of the SPM laser beam from the cantilever were chosen very close to the initial deflection from the cantilever far away from the surface).

Specific parameters of the scan can be found in f3.opt andf3.mdt.
On the next page description the grounds of image obtaining are presented. 

AFM images are obtained by commercial SPM P4 with NSC11 cantilevers.
Additional information about laser structures were received with usage of Contact EFM, Kelvin mode.