Development of Photoelectron Momentum Microscope to Molecular Science

Abstract

Photoelectron angular distribution from the valence state of π-conjugated molecules on the surface has been studied to clarify the molecular orientation quantitatively with multiple scattering theory of photoelectron emission intensity. After developing the photoelectron emission techniques together with molecular thin-film preparations, a novel concept of photoemission tomography enables to investigate the electronic states in depth to understand the molecular functional properties in a sense of orbital. The article reviews the recent progress and development of the photoelectron momentum microscope related techniques for molecular science.