ABSTRACT
With size reduction, the differences in the electronic properties of materials and current devices, for example, those caused by the structural nonuniformity in each element, have an ever-increasing effect on macroscopic functions. For further advances in nanoscale science and technology, the development of a method for exploring the transient dynamics of local quantum functions in organized small structures is essential. Here, we overview laser-combined scanning tunneling microscopy/spectroscopy (STM/STS) based on the optical pump-probe method, which enables the real-space imaging of nanoscale quantum dynamics with atomic resolution even in the femtosecond range.
