Scanning probe microscopy (SPM), a key invention in nanoscience, has by now been
extended to a wide spectrum of basic and applied fields. Its application to basic science led …

Despite significant advancements in materials design for renewable energy devices, the
fundamental understanding of the underlying processes in many materials remains limited …

The switchable electric polarization is usually achieved in ferroelectric materials with
noncentrosymmetric structures, which opens exciting opportunities for information storage …

We investigate photocurrents driven by femtosecond laser excitation of a (sub)-nanometer
tunnel junction in an ultrahigh vacuum low-temperature scanning tunneling microscope …

Studying nanoscale photophysical processes is mandatory to fully understand the complex
optoelectronic properties in semiconductor materials used in photovoltaics and light emitting …

The key elements in the steady miniaturization process of cutting-edge semiconductor
devices are the understanding and controlling of charge dynamics on the atomic scale. In …

We present a combination of pulsed optical excitation and scanning tunneling microscopy
with a highly flexible pulse generation method. A high frequency arbitrary wave generator …

Combining scanning tunneling microscopy (STM) and optical excitation has been a major
objective in STM for the last 30 years to study light–matter interactions on the atomic scale …

We demonstrate the potential of sub-bandgap laser-excited cross-sectional scanning
tunneling microscopy and spectroscopy to investigate the presence of defect states in …

We present a method for determining the surface photovoltage (SPV) on semiconductor
surfaces with non-metallic electronic structure under continuous wave illumination using …