title: A scanning tunneling microscope as a tunable nanoantenna for atomic scale control of optical-field enhancement.
abstract: The high stability of a low temperature (9 K) scanning tunneling microscope junction is used to precisely adjust the enhancement of an external pulsed vacuum ultraviolet (VUV) laser. The ensuing VUV optical-field strength is mapped on an hydrogenated Si(100) surface by imprinting locally one-photon atomic scale hydrogen desorption. Subsequent to irradiation, topography of the Si(100):H surface at the reacted area revealed a desorption spot with unprecedented atomic precision. Our results show that the shapes, positions, and sizes of the desorption spots are correlated to the calculated optical-field structure, offering real control of the optical-field distribution at molecular scale.
authors.affiliation: Institut des Sciences Moléculaires d'Orsay, ISMO, UMR 8214, CNRS-Université Paris-Sud, Bâtiment 210, 91405 Orsay Cedex, France.
authors.forename: Damien
authors.initials: D
authors.lastname: Riedel
authors.forename: Roger
authors.initials: R
authors.lastname: Delattre
authors.forename: Andrey G
authors.initials: AG
authors.lastname: Borisov
authors.forename: Tatiana V
authors.initials: TV
authors.lastname: Teperik