idw – Informationsdienst Wissenschaft
Nachrichten, Termine, Experten
Nachrichten, Termine, Experten
Referent: Prof. Dr. Harald Giessen, 4. Physikalisches Institut, Universität Stuttgart
Abstrakt: Metallic metamaterials have shown a number of fascinating properties over the last few years. A negative refractive index, negative refraction, superlenses, and optical cloaking are some of the ambitious applications where metamaterials hold great promise. We are going to present fabrication methods for the manufacturing of 3D metamaterials [1]. We are investigating their coupling properties and the resulting optical spectra. Hybridization of the electric as well as the magnetic resonances allows us to easily understand the complex optical properties [2]. Lateral as well as vertical coupling can result in Fano-resonances [3] and EIT-like phenomena [4]. These phenomena allow construction novel LSPR sensors with a figure of merit as high as five [5]. Nanooptics can also aid antenna-enhanced hydrogen sensing [6] and sensitive nonlinear optical nanoantenna-enhanced pump-probe experiments that detect mechanoplasmonic oscillations [7]. Additionally, more complex structures can act as 3D plasmon rulers [8]. The connection between structural symmetry and their electric as well as magnetic dipole and higher-order multipole coupling will be elucidated. It turns out that stereometamaterials [9], where the spatial arrangement of the constituents is varied, reveal a highly complex rotational dispersion. Combining local plasmonic field enhancement with magnetooptical materials can give the possibility to enahance Faraday rotation and might lead the way towards thin-film large-area Faraday isolators [10], see figure to the right.
References
[1] Na Liu, Hongcang Guo, Liwei Fu, Stefan Kaiser, Heinz Schweizer, and Harald Giessen: Three-dimensional photonic metamaterials at optical frequencies, Nature Materials 7, 31 (2008).
[2] N. Liu and H. Giessen: Coupling effects in optical metamaterials, Angew. Chemie Int. Ed. 49, 9838 (2010).
[3] B. Lukyanchuk, N. I. Zheludev, S. A. Maier, N. J. Halas, P. Nordlander, H. Giessen, and C. T. Chong: The Fano resonance in plasmonic nanostructures and metamaterials, Nature Materials 9, 707 (2010).
[4] N. Liu, N. Liu, L. Langguth, T. Weiss, J. Kästel, M. Fleischhauer, T. Pfau, and H. Giessen: Plasmonic EIT analog at the Drude damping limit, Nature Materials 8, 758 (2009).
[5] Na Liu, T. Weiss, M. Mesch, L. Langguth, U. Eigenthaler, M. Hirschner, C. Sönnichsen, and H. Giessen: Planar metamaterial analog of electromagnetically induced transparency for plasmonic sensing, Nano Lett. 10, 1103 (2010).
[6] N. Liu, M. L. Tang, M. Hentschel, H. Giessen, and A. P. Alivisatos: Nanoantenna-enhanced gas sensing in a single tailored nanofocus, Nature Materials 10, 631 (2011).
[7] Th. Schumacher, K. Kratzer, D. Molnar, M. Hentschel, H. Giessen, and M. Lippitz: Nanoantenna-enhanced ultrafast nonlinear spectroscopy of a single gold nanoparticle, Nature Communications 2, 333 (2011).
[8] N. Liu, A. P. Alivisatos, M. Hentschel, Th. Weiss, and H. Giessen: Towards 3D Plasmon Rulers, Science 332, 1407 (2011).
[9] Na Liu, Hui Liu, Shining Zhu, and Harald Giessen: Stereometamaterials, Nature Photonics 3, 157 (2009).
[10] J. Y. Chin, T. Steinle, T. Wehlus, D. Dregely, T. Weiss, V. I. Belotelov, B. Stritzker, and H. Giessen, Nonreciprocal plasmonics enables giant enhancement of thin film Faraday rotation, Nature Communications 4, 1599 (2013).
Information on participating / attending:
Die Veranstaltung findet am Donnerstag, 12.12.2013, um 17:00 Uhr im Hörsaal des Instituts für Physik, Felix-Hausdorff-Straße 6, statt.
Organisation: Prof. H. Fehske und Prof. L. Schweikhard
Institut für Physik, Felix-Hausdorff-Straße 6, 17489 Greifswald
Tel. 03834 86-4700, info@physik.uni-greifswald.de
Date:
12/12/2013 17:00 - 12/12/2013 18:00
Event venue:
Hörsaal, Institut für Physik
Felix-Hausdorff-Straße 6
17489 Greifswald
Mecklenburg-Vorpommern
Germany
Target group:
Scientists and scholars, Students
Relevance:
regional
Subject areas:
Physics / astronomy
Types of events:
Presentation / colloquium / lecture
Entry:
11/26/2013
Sender/author:
Sabine Köditz
Department:
Presse- und Informationsstelle
Event is free:
yes
Language of the text:
German
URL of this event: http://idw-online.de/en/event45678
You can combine search terms with and, or and/or not, e.g. Philo not logy.
You can use brackets to separate combinations from each other, e.g. (Philo not logy) or (Psycho and logy).
Coherent groups of words will be located as complete phrases if you put them into quotation marks, e.g. “Federal Republic of Germany”.
You can also use the advanced search without entering search terms. It will then follow the criteria you have selected (e.g. country or subject area).
If you have not selected any criteria in a given category, the entire category will be searched (e.g. all subject areas or all countries).
