Dresden 2020 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 97: Nanostructures, Nanostructuring and Nanosized Soft Matter

CPP 97.5: Vortrag

Donnerstag, 19. März 2020, 16:15–16:30, ZEU 255

Colloidal self-assembly route towards efficient designing of nanophotonic architectures — •Swagato Sarkar1,2, Joby Joseph1, and Tobias A.F. König2,31Dept. of Physics, Indian Institute of Technology Delhi, New Delhi-110016, India — 2Leibniz-Institut für Polymerforschung Dresden e.V., Institute of Physical Chemistry and Polymer Physics, Hohe Str. 6, 01069 Dresden, Germany — 3Technical University of Dresden, Physical Chemistry, 01062 Dresden, Germany

For many photonic applications, it is important to confine light of a specific wavelength at a certain volume of interest at low losses. So far, it is only possible to use the polarized light perpendicular to the solid grid lines to excite waveguide plasmon polaritons in a waveguide supported hybrid structure. In this contribution, we use a plasmonic grating fabricated by colloidal self-assembly [König, Fery et al. Adv. Optical Mater. 2018, 1800564] and an ultrathin injection layer to guide the resonant modes selectively.[Sarkar, Joseph, König ACS Appl. Mater. Interfaces 2019, 11, 14, 13752-13760] We use gold nanoparticles self-assembled in a linear template on a titanium dioxide (TiO2) layer to study the dispersion relation with conventional UV-vis-NIR spectroscopic methods. Compared to metallic grids, the experimentally observed (supported by simulation) range of hybridized guided-modes can now be extended to modes along the nanoparticle chain lines. With future applications in energy conversion and optical filters employing these cost-efficient and up-scalable directed self-assembly methods, we discuss its direct application in refractive index sensing.

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