title: Optical microscopy via spectral modifications of a nanoantenna.
abstract: The existing optical microscopes form an image by collecting photons emitted from an object. Here we report on the experimental realization of microscopy without the need for direct optical communication with the sample. To achieve this, we have scanned a single gold nanoparticle acting as a nanoantenna in the near field of a sample and have studied the modification of its intrinsic radiative properties by monitoring its plasmon spectrum.
authors.affiliation: Laboratory of Physical Chemistry, Swiss Federal Institute of Technology (ETH), 8093 Zurich, Switzerland.
authors.forename: T
authors.initials: T
authors.lastname: Kalkbrenner
authors.forename: U
authors.initials: U
authors.lastname: Håkanson
authors.forename: A
authors.initials: A
authors.lastname: Schädle
authors.forename: S
authors.initials: S
authors.lastname: Burger
authors.forename: C
authors.initials: C
authors.lastname: Henkel
authors.forename: V
authors.initials: V
authors.lastname: Sandoghdar