title: Light propagation and interaction observed with electrons.
abstract: We discuss possibilities for a microscopic optical characterization of thin films and surfaces based on photoemission electron microscopy. We show that propagating light with wavelengths across the visible range can readily be visualized, and linear and non-linear materials properties can be evaluated non-invasively with nanometer spatial resolution. While femtosecond temporal resolution can be achieved in pump-probe-type experiments, the interferometric approach presented here has typical image frame times of ~200 fs.
authors.affiliation: Physics Department Portland State University, 1719 SW 10th Avenue, Portland, OR 97201, USA.
authors.forename: Robert C
authors.initials: RC
authors.lastname: Word
authors.affiliation: Physics Department Portland State University, 1719 SW 10th Avenue, Portland, OR 97201, USA.
authors.forename: J P S
authors.initials: JPS
authors.lastname: Fitzgerald
authors.affiliation: Physics Department Portland State University, 1719 SW 10th Avenue, Portland, OR 97201, USA. Electronic address: rkoe@pdx.edu.
authors.forename: R
authors.initials: R
authors.lastname: Könenkamp
keywords: Multi-photon excitation; Non-linear imaging; Photoemission electron microscopy; Pulsed laser excitation