04.12.2018 - Isabelle Staude - Light-emitting metasurfaces based on hybrid resonant nanostructures
Functional Photonic Nanostructures Junior Research Group Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller-University Jena
| When |
Dec 04, 2018
from 06:00 PM to 07:00 PM |
|---|---|
| Where | HS II, Physik Hochhaus, Hermann-Herder-Str. 3 |
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All-dielectric nanoparticles with a high refractive index that support electric and magnetic multipolar Mie-type resonances, which can be tuned by the nanoparticle geometry and environment. Thereby they offer unique opportunities for engineering their near-field and far-field responses, while exhibiting very low absorption losses. In particular, semiconductor nanoresonators were extensively used as building blocks of wavefront-shaping metasurfaces. However, Mie-resonant semiconductor nanoparticles can also be employed as building blocks of optical nanoantennas, exhibiting high directivity, Purcell enhancement, and near-unity radiation efficiencies. This talk will provide an overview of our recent advances in enhancing and tailoring light emission in the visible and near-infrared spectral range by metasurfaces composed of designed Mie-resonant semiconductor nanoparticles hybridized with various types of emitters, including semiconductor quantum dots and monolayers of transition metal dichalcogenides. In order to characterize the emission properties of the hybrid systems, we perform micro-photoluminescence imaging, spectroscopy, and Fourier imaging for a variety of different active metasurface architectures. Our results show that Mie-resonant metasurfaces provide a powerful platform for manipulating the spectral and directional properties of the emitted light.
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