Notizen: New Concept of a Scanning Laser Microscope Integrated Inside an Encapsulated Cryogenic Sample Stage

We introduce a compact scanning laser microscope that is applicable for direct visualization of dissipative electric structures in solid state systems. In order to overcome the disturbing influence of any background radiation, the shielded sample cryostage incorporates the complete microscope consisting of a laser diode, the deflection unit, and the focussing optics. Our imaging method provides access to a class of nonlinear transport phenomena that so far have eluded unperturbed observation