Integrated Optical Sciences
Biomolecules and nanostructures
The Optical Sciences group studies the interaction of light and matter at the nanoscale.
We do this by exploring ways to shape light and its environment. It's what we call
active and passive control. Our current focus is on the interaction of light with
biomolecules and nanostructures. We are part of Twente
University's Department of Science and Technology and member of the
Near-field imaging of plasmonic structures
Surface Plasmons are quasiparticles that describe the collective oscillation of conduction electrons at the surface of a metal. They can couple strongly with the light resulting in the generation of Surface Plasmon Polaritons (SPP). The coupling of the surface plasmons with the light requires the matching of the incident photon momentum to the plasmon momentum. For this matching, either a prism coupling or a grating coupling is employed. We explore and investigate plasmonic structures such as curved gratings and nano-antennas that efficiently generate intense (localized) plasmon fields. A phase-sensitive Photon Scanning Tunneling Microscope (PSTM) is used to obtain both the topography and the optical amplitude and the phase of the local field on the structure.