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Metamaterials and metasurfaces


10:30 Invited talk: Development of Three-Dimensional Fabrication Technologies Using Laser Processing and 3D Printing for Terahertz Optics Production

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Kuniaki Konishi
The University of Tokyo (Japan)

Lithography techniques conventionally used to make artifical strucutres can only make quasi-two-dimensional structures. We are developing new technologies which makes it possible to produce a three-dimensional artificial structure with a resolution of several tens of micrometers smaller than the wavelength of the THz wave. In this talk, I introduce the development of three-dimensional artificial structures for THz wave control fabricated by using laser processing and 3D printing technologies.
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10:50 : Spectral tuning of SPP reflection by quasi-symmetric metal nano-block arrays

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Naoki Ichiji, Atsusi Kubo
University of Tsukuba (Japan)

We investigate the spectral tuning of the SPP wave packets by quasi-symmetric arrays composed of metal blocks with two different structural lengths. The FDTD simulations showed a resonance phenomenon in the gap between the blocks when the two blocks have different lengths in the longitudinal direction. Furthermore, the resonance of the gap resulted in a significant spectral modulation of the reflected SPP wave that depended on the structural length and positional relationship of the blocks.
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11:05 Invited talk: Modeling of Spatially Dispersive Quadrupolar Metasurfaces

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Karim Achouri, Ville Tiukuvaara, Olivier J. F. Martin
EPFL (Switzerland)

Metasurfaces are typically modeled using boundary conditions restricted to dipolar responses. While generally effective, this modeling approach suffers in the case of large incidence angles. This work is expected to be useful for designing spatial analog optical signal processing metasurfaces for incident beams with large angular spectra.
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11:25 Invited talk: Tunable Carbon-Based Nanomaterials for THz Applications

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Aleksandra Przewloka (1), Nikolaos Xenidis (2), Serguei Smirnov (2), Aleksandra Krajewska (1), Piotr Drozdz (1), Dmitri Lioubtchenko (1)
(1)CENTERA Laboratories (Poland) , (2)KTH Royal Institute of Technology (Sweden)

In this work single-walled carbon nanotube tuning properties are studied for phase shifting applications. The dielectric rod waveguide with loaded carbon nanomaterials was experimentally studied in ultra-wide frequency band of 0.1-0.5 THz.
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