Integrated Optical Sciences
Biomolecules and nanostructures
The Optical Sciences group studies the interaction of light and matter. Our current focus is on detection and sensing/imaging with an emphasis on the development of integrated photonics. We are part of Twente University's Department of Science and Technology and member of the MESA+ institute.
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.