future events

Three-Dimensional mu Printing: An Enabling Technology

TYPESolid State Institute Seminar
Speaker:Professor Georg von Freymann
Affiliation:Physics Department and Research Center OPTIMAS, Technische Universität Kaiserslautern, Kaiserslautern, Germany Fraunhofer Institute for Industrial Mathematics, Kaiserslautern, Germany
Time:12:30 - 13:30
Location:Solid State Auditorium(Entrance)
Remark:Host: Distinguished Professor Moti Segev

During the last years direct laser writing via two-photon absorption has reached a level of maturity and ease of application
that it can be considered as 3D printing on the micron scale. This technology is still developing towards higher resolution and
increasing speed of fabrication. Among the recent technological achievements are the fields of super-resolution lithography and
spatial-light-modulator based lithography, enabling novel fields like transport in aperiodic photonic structures and optical
quantum simulators.
In my presentation I will give an overview over our recent progress regarding spatial-light-modulator based direct laser writing
and will discuss transport phenomena arising in aperiodic deterministic photonic structures as well as in photonic topological
insulators. In aperiodic deterministic structures we observe lateral Anderson localization of light, depending on the type and
strength of disorder introduced [1]. In photonic topological insulators, we especially study the influence of time-dependent defects
in topologically protected edge modes [2]. Here, we observe scattering into the bulk modes depending on the driving frequency
of the defect.
A similar kind of wave-based transport can be studied in spin-wave systems. Here, I will discuss transport in optically
reprogrammable magnetic periodic structures, a novel lithography-free approach of micro-structuring for magnetic materials [3].
[1] Spatial correlations and optical properties in three-dimensional deterministic aperiodic structures, M. Renner and G. von Freymann,
Scientific Reports
5, 13129 (2015)

[2] Dynamic defects in photonic Floquet topological insulators, C. Jörg, F. Letscher, M. Fleischhauer, and G. von Freymann, New Journal
of Physics
19, 083003 (2017)
[3] Optically-Reconfigurable Magnetic Materials, M. Vogel, A. V. Chumak, E. H. Waller, T. Langner, V. I. Vasyuchka, B. Hillebrands, and
G. von Freymann, Nature Physics
11, 487 (2015)