Berlin 2012 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 64: Plasmonics and nanooptics III
O 64.5: Vortrag
Donnerstag, 29. März 2012, 11:30–11:45, MA 005
Magic Angles in Metamaterials — •Sven M. Hein1, Lutz Langguth1,2, and Harald Giessen1 — 14th Physics Institute and Research Center SCOPE, University of Stuttgart, D-70569 Stuttgart, Germany — 2Center for Nanophotonics, FOM Institute for Atomic and Molecular Physics (AMOLF), Science Park 104, 1098 XG Amsterdam, The Netherlands
When coupling two dipoles to each other in three dimensions, there are
certain conditions under which the interaction vanishes. This effect is
known for example in Nuclear Magnetic Resonance as "Magic Angles". It
arises from the fact that at certain geometric arrangements the dipole
coupling changes from attractive to repulsive. In 3D metamaterials [1], we
have to consider the electric as well as the magnetic dipoles, and beyond
spatial variation also twisting is possible, e.g. in stereometamaterials
[2]. We investigate this intriguing effect in detail and show that it
could be useful to elucidate quadrupole- and higher-order interactions.
Allowing for retardation leads to a plethora of fascinating new effects.
[1] N. Liu et al., Nature Materials 7, 31 (2008).
[2] N. Liu and H. Giessen, Nature Photonics 3, 157-162 (2009).