Ultrafast nanooptics

Nonlinear optics in metallic nanowaveguides in Lithium Niobate (Pertsch, Rockstuhl)

Project description


The confinement of light by plasmonic waveguides in nano-dimensions can be a source of considerable nonlinearity when combined with an appropriate nonlinear material. In this project we study nonlinear plasmonic waveguides, such as metallic stripes, grooves, and wedges, in Lithium Niobate as well as in complex arrangements, as e.g. couplers, arrays, splitters, and resonators, composed of such guides. It is our purpose to understand and to control the ultrafast nonlinear dynamics of light in these structures.

We explore the possibilities to use the nonlinearity to overcome existing limitations of metal-optics by compensating the plasmonic propagation losses of transmitted signals by parametric gain. In extension, we also investigate nano-sized optical parametric oscillators Furthermore complex plasmonic waveguide structures are studied for the ultrafast control of optical near-fields on the nano-scale.

The project comprises a comprehensive scientific approach: State-of-the-art theoretical methods are used and are further developed to simulate nonlinear plasmonic structures. Advanced nanofabrication technologies are used to nanostructure Lithium Niobate together with a number of noble metals. We equally employ a spectrum of experimental techniques for the characterization of ultrafast processes using near-field and far-field approaches.



(left) Nanostructured microwire waveguide from LiNbO3 and Pt for efficient cascaded nonlinear interactions. (center) Geometry of the plasmonic slot-waveguide with Lithium Niobate in its core and the field profiles of the lowest and second order eigenmode supported by the structure. (right) The generated second harmonic for the plasmonic slot-waveguide while considering the interaction of the lowest order mode at the fundamental frequency and the lowest order or the second order mode at the second harmonic.


Generation and near-field imaging of Airy surface plasmons
A. Minovich, A. Klein, N. Janunts, T. Pertsch, D. Neshev, and Y. Kivshar
Phys. Rev. Lett. 107 (2011) 116802
Cascaded third harmonic generation in lithium niobate nano-waveguides
A. S. Solntsev, A. A. Sukhorukov, D. N. Neshev, R. Iliew, R. Geiss, T. Pertsch, and Y. S. Kivshar
Applied Phys. Lett. 98 (2011) 231110
Integrating cold plasma equations into the Fourier modal method to analyze second harmonic generation at metallic nanostructures
T. Paul, C. Rockstuhl, and F. Lederer
Journal of Modern Optics 58 (2011) 438
Long-distance indirect excitation of nanoplasmonic resonances
W. Khunsin, B. Brian, J. Dorfmüller, M. Eßlinger, R. Vogelgesang, C. Etrich, C. Rockstuhl, A. Dmitriev, and K. Kern
Nano Letters 11 (2011) 2765
Towards the Origin of the Nonlinear Response in Hybrid Plasmonic Systems
T. Utikal, T. Zentgraf, T. Paul, C. Rockstuhl, F. Lederer, M. Lippitz, and H. Giessen
Physical Review Letters 106 (2011) 133901
Relating localized nanoparticle resonances to an associated antenna problem
S. Bin Hasan, R. Filter, A. Ahmed, R. Vogelgesang, R. Gordon, C. Rockstuhl, and F. Lederer
Phys. Rev. B 84 (2011) 195405
Generation of Hankel-type surface plasmon polaritons in the vicinity of a metallic nanohole
S. Nerkararyan, Kh. Nerkararyan, N. Janunts, and T. Pertsch
Phys. Rev. B 82 (2010) 245405
A numerical approach for analyzing higher harmonic generation in multilayer nanostructures
T. Paul, C. Rockstuhl, and F. Lederer
J. Opt. Soc. Am. B 27 (2010) 1118
Plasmonic Nanowire Antennas: Experiment, Simulation, and Theory
J. Dorfmüller, R. Vogelgesang, W. Khunsin, C. Rockstuhl, C. Etrich, and K. Kern|
Nano Letters 10 (2010) 3596
Plasmonic modes of extreme subwavelength nanocavities
J. Petschulat, C. Helgert, M. Steinert, N. Bergner, C. Rockstuhl, F. Lederer, T. Pertsch, A. Tünnermann, and E.-B. Kley
Opt. Lett. 35 (2010) 2693
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