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SINAM Nano-Seminar Announced Nanoscale Optical Characterization of Photonic and Electronic Structures by Scattering-type Near-field Microscopy Dr. Rainer Hillenbrand - Max Planck Institute Monday, October 16, 2006 ABSTRACT The development of novel nanoelectronic and nanophotonic structures requires ultrahigh-resolution optical microsopy for characterization and mapping of local material properties and nanoscale confined light fields. This seminar will demonstrate such a microsopy providing a spatial resolution of about 10-20nm independent of the wavelength. It is based on elastic light scattering from the probing tip of an atomic force microsope (scattering-type near-field optical microscopy, s-SNOM). Besides a short introduction of the technique, an overview of s-SNOM applications in the field of plasmonics/nanooptics and material sciences will also be given. Operating the microscope at visible frequencies, a heterodyne interferometric detection scheme allows to map the field distribution of plasmon-resonant structures in amplitude and phase. Images of the dipole mode in gold nanodiscs and "hot spots" between closely spaced gold particles will be presented. At mid-infrared frequencies another species of surface polaritons exists which are formed by coupling of light to optical phonons in polar crystals such as SiC. These surface modes could enable interesting photonic applications analogous to plasmonics. Using s-SNOM we study basic properties of surface phonon polaritons on SiC crystals including superlensing of thin SiC slabs. Infrared s-SNOM can be also used for local plasmon polariton spectroscopy of doped semiconductors yielding nanoscale resolved information about electron properties in microelectronic device structures. Performing local phonon polariton spectroscopy, s-SNOM can map nanoscale crystal defects and strain fields. ABOUT DR. HILLENBRAND Dr. Hillenbrand is the head of the Nano-Photonics Group, Max-Planck-Institute of Biochemistry Martinsried, Germany. He received his PhD in physics from the Technical University in Munich (2001). Some of his research interests include nanoscale resolved near-field optical microscopy and near-field infrared spectroscopy, optical antennas, plasmon- and phonon-polariton based nanooptics, and near-field optical subsurface imaging and near-field optical tomography.
Link to Dr. Hillebrand's Nano-Photonics group, at the Max Planck Institute for Biochemistry View the flyer for this event (PDF, 21 KB)
Seminar presented by the Center for Scalable and Integrated Nanomanufacturing
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