Nano-Optics
Apertureless SNOM Nano-Plasmonics
Summary
We are interested in the optical properties of nm-sized objects, in particular nano-plasmonic structures. We use the field enhancement volume near the tip of an apertureless scanning nearfield optical microscope (aSNOM). Our interferometric detection records the complex optical amplitude of both localized and propagating surface plasmon polaritons. The lateral resolution of better than 10 nm enables us to extract information on resonant eigenmodes, transmission lines properties, etc.
Read more ...
Team Members
Dr. Ralf Vogelgesang, Moritz Eßlinger, Matthias Brandstetter, Markus Oster
Key publications
- W. Khunsin,
B. Brian, J. Dorfmüller, M. Eßlinger,
R. Vogelgesang,
C. Etrich, C. Rockstuhl, A. Dmitriev, K. Kern
Long-distance indirect excitation of nanoplasmonic resonances,
Nano Letters, ASAP (2011). Link to paper - J. Dorfmüller,
D. Dregely, M. Eßlinger,
W. Khunsin,
R. Vogelgesang, K. Kern, H. Giessen
Near-field Dynamics of Optical Yagi-Uda Nanoantennas,
Nano Letters, ASAP (2011). Link to paper - D. Dregely, R. Taubert, J. Dorfmüller,
R. Vogelgesang,
K. Kern, H. Giessen
3D optical Yagi-Uda nanoantenna-array,
Nature Communications 2, 267 (2011). Link to paper - M. Hentschel, D. Dregely, R. Vogelgesang, H. Giessen, and N. Liu
Plasmonic oligomers: the role of individual particles in collective behavior,
ACS Nano 5, 2042-2050 (2011). Link to paper - J. Dorfmüller, R. Vogelgesang, W. Khunsin, C. Rockstuhl, C. Etrich, and K. Kern
Plasmonic Nanowire Antennas: Experiment, Simulation and Theory,
Nano Letters 10, 3596-3603 (2010). Link to paper - M. Hentschel, M. Saliba, R. Vogelgesang, H. Giessen, A. P. Alivisatos, and N. Liu
Transition from Isolated to Collective Modes in Plasmonic Oligomers
Nano Letters 10, 2721-2726 (2010). Link to paper - M. Mäder, T. Höche, J.W. Gerlach, S. Perlt, J. Dorfmüller, M. Saliba, R. Vogelgesang, K. Kern, and B. Rauschenbach
Plasmonic Activity of Large-Area Gold-Nanodot Arrays on Arbitrary Substrates
Nano Letters 10, 47-51 (2010). Link to paper - H. Giessen and R. Vogelgesang,
Perspective: Glimpsing the Weak Magnetic Field of Light
Science 326, 529-530 (2009). Link to paper - J. Dorfmüller, R. Vogelgesang, R. T. Weitz, C. Rockstuhl, C. Etrich, T. Pertsch, F. Lederer, and K. Kern
Fabry-Pérot resonances in one-dimensional plasmonic nano-structures,
Nano Letters 9, 2372-2377 (2009). Link to paper - R. Esteban, R. Vogelgesang, J. Dorfmüller, A. Dmitriev, C. Rockstuhl, C. Etrich, and K. Kern
Direct Near-Field Optical Imaging of Higher Order Plasmonic Resonances,
Nano Letters 8, 3155-3159 (2008). Link to paper
- R. Esteban, R. Vogelgesang, K. Kern,
Tip-substrate interaction in optical near-field,
Physical Review B 75, p. 195410 (2007). Link to paper
- A. Bek, R. Vogelgesang, and K. Kern,
Apertureless scanning near field optical microscope with sub-10 nm resolution,
Review of Scientific Instruments 77, p. 043703 (2006). Link to paper
STM-induced luminescence
Summary
STM spectroscopy in UHV at liquid He temperature can yield a spatial resolution around 0.1 nanometer while optical spectroscopy reaches only about 10 nanometers even for near-field probes. The combination of classical far-field luminescence spectroscopy with the highly localized electron injection by the STM tip can exploit the virtues of both methods. This provides new opportunities for the characterization of single molecules and nanometer structures.
Read more ...
Team Members
Dr. Klaus Kuhnke, Dr. Uta Schlickum, Christoph Große, Dr. Alexander Kabakchiev, Dr. Theresa Lutz
Key publications
- A.Kabakchiev, K,Kuhnke, T.Lutz, and K. Kern
Electroluminescence from individual pentacene nanocrystals,
Chem Phys Chem 11, 3412 (2010). - T.Lutz, A.Kabakchiev, T.Dufaux, C.Wolpert, Z.Wang, M.Burghard, K.Kuhnke, and K.Kern
Scanning tunneling luminescence of individual CdSe nanowires,
Small (2011) - published online DOI: 10.1002/smll.201100434.
