Plenarvorträge - DPG-Tagungen

Halbleiterphysik Montag
Fachsitzungen
– Haupt-, Kurzvorträge und Posterbeiträge –
HL 1 Hauptvortrag Wegener
Zeit: Montag 09:30–10:15 Raum: H15
Hauptvortrag HL 1.1 Mo 09:30 H15
Three-dimensional Photonic Crystals: Fabrication, characterization
and physics — •M. Wegener 1,2 , M. Deubel 3,2 , G. von
Freymann 3,2 , S. Pereira 4,2 , K. Busch 4,2 , C.M. Soukoulis 5 , A.
Kaso 6 , and S. John 6 — 1 Institut für Angewandte Physik, Wolfgang-
Gaede-Straße 1, Universität Karlsruhe (TH), D-76131 Karlsruhe, Germany
— 2 DFG-Center for Functional Nanostructures (CFN), Wolfgang-
Gaede-Straße 1, D-76131 Karlsruhe, Germany — 3 Institut für Nanotechnologie,
Forschungszentrum Karlsruhe in der Helmholtz-Gemeinschaft,
Postfach 3640, D-76021 Karlsruhe, Germany — 4 Institut für Theorie
der Kondensierten Materie, Wolfgang-Gaede-Straße 1, Universität Karlsruhe
(TH), D-76131 Karlsruhe, Germany — 5 Ames Laboratory and
Department of Physics and Astronomy, Iowa State University, Ames,
Iowa 50011, U.S.A. — 6 Department of Physics, University of Toronto, 60
St.George Street, Toronto, Ontario, Canada M5S 1A7
HL 2 Symposium Photonische Kristalle
Photonic Crystals can be viewed as semiconductors for light. Despite
intensive efforts throughout the past decade, the holy grail of inexpensive
fabrication techniques for high-quality, large-scale three-dimensional
Photonic Crystals with photonic gaps in the telecommunication range or
even in the visible remains elusive. Here, we review our corresponding
work along the lines of two compatible and complementary techniques,
namely holographic lithography and direct laser writing. Results from
optical spectroscopy are compared with detailed theoretical calculations,
revealing the high quality of the structures.
Zeit: Montag 10:15–12:45 Raum: H15
HL 2.1 Mo 10:15 H15
Photonic crystal waveguide devices: Dispersion characteristics,
anomalous refraction phenomena and their potential applications.
— •Remigius Zengerle — Technical University of Kaiserslautern,
Chair of Electromagnetics and optical Communications, Erwin
Schroedinger street 11, D-67663 Kaiserslautern
author: R. Zengerle Early own experimental investigations on one- and
two-dimensional strongly corrugated optical waveguides revealed both
the existence of photonic bandgaps and anomalous refraction phenomena.
Today strongly one-, two- or three-dimensional periodic structures
with an omnidirectional photonic bandgap are well known as ”photonic”
crystals. For applications in new or improved functional components
used in communications we currently investigated in more detail two
unique properties which may be of special interest: Chromatic dispersion
and anomalous refraction phenomena. Based on our experimental
results, the dispersive and anomalous refraction properties of one- and
two-dimensional photonic crystal waveguides are explained both phenomenologically
and by simulations using Maxwells Theory. Possible new
ways for applications of semiconductor photonic bandgap devices in optical
communications will also be discussed.
HL 2.2 Mo 10:45 H15
2D Photonic Crystals for Integrated Optics — •Anne Talneau
— CNRS / LPN Laboratoire de Photonique et de Nanostructures, Route
de Nozay, F- 91460 Marcoussis
2D Photonic Crystals could be an interesting alternative for Photonic
Integrated Circuits, increasing the compactness and the integration of
optical functions. The in-plane confinement is obtained through the photonic
band gap generated by the periodic holes pattern, and the out-ofplane
confinement is reached through total internal reflection. We present
quantitative performances of passive and active structures in the 1.55 micron
wavelength domain. We will discuss possible applications, keeping
in mind the trade-off between design and technological limitation.
HL 2.3 Mo 11:15 H15
Photonic Crystals for Telecom Applications and Ultrafast
Optics — •Andreas Tünnermann, Markus Augustin, Thomas
Schreiber, Jens Limpert, Stefan Nolte, and Ernst-Bernard
Kley — Institut für Angewandte Physik, FSU Jena
Over the course of a few years photonic crystal nanostructures have
developed into a fast growing field attracting great interest. Especially
structures showing high dispersion or photonic crystal cavities with high
quality factors can find many applications in modern optics. In this pre-
sentation the potential of photonic crystal nanostructures in slab and
fiber geometry is discussed. Both types of structures are realized in materials
with a low index contrast. A thorough analysis of propagation
properties - attenuation, modal structure and dispersion - of photonic
crystal fibers and photonic crystal slab waveguides is given. Different application
examples, like the use of devices with tailored dispersion for
continuum generation or ultrashort pulse compression are given.
HL 2.4 Mo 11:45 H15
Diffraction Control and Enhanced Transmission through Sub-
Wavelength Apertures — •Thomas W. Ebbesen — ISIS, University
Louis Pasteur, 8 rue Gaspard Monge, 67000 Strasbourg, France
Periodically structured metallic films perforated with one or more subwavelength
holes ( 150 nm) can transmit the light with an efficiency orders
of magnitude larger than what theory predicts for single holes. The
efficiency can even be much larger than the fractional area occupied by
the hole, which means that even the light falling beside the hole emerges
on the other side of the sample. This extraordinary transmission is due to
the coupling of the incident light with the surface plasmons. The transmission
spectrum contains peaks attributed to surface-plasmon modes
that depend on both the symmetry and the 2D lattice parameter of
the surface corrugation. Another fundamental problem of sub-wavelength
apertures, namely optical diffraction, can also be controlled using surface
plasmons. Most recently, it has been found that even isolated single subwavelength
apertures (in the absence of periodic surface corrugations)
can give rise to transmission peaks due the presence of localized surface
plasmon modes induced at the aperture ridge. These findings have broad
fundamental and practical implications and show that, with modern fabrication
techniques, surface plasmons can be engineered and controlled
to yield unique optical properties which could find application in high
density data storage, photonic integration, near field probes, etc..
HL 2.5 Mo 12:15 H15
Metallic photonic crystals — •Harald Giessen 1 , Andre Christ 2 ,
Thomas Zentgraf 2 , Stefan Linden 2 , Kai Schubert 2 , Dietmar
Nau 1 , Sergei Tikhodeev 3 , Nikolai Gippius 3 , and Jürgen Kuhl 2
— 1 Institute of Applied Physics, University of Bonn, Germany — 2 Max-
Planck-Institut für Festkörperforschung, Germany — 3 General Physics
Institute RAS, Moscow, Russia
We prepare two-dimensional gold nanodot arrays with a diameter of
100 nm and a thickness of 20 nm on a waveguide substrate. Upon light
illumination, particle plasmons are formed inside the gold dots. These
localized plasmons form an extended state via photonic interaction me-