Physikalisches Kolloquium: Quadratic material assemblies with electro-optic and nonlinear effects

Feb 02
February 2, 2022 12:00 pm - 1:00 pm
Online via Zoom

Quadratic material assemblies with electro-optic and nonlinear effects

Nonlinear and electro-optic devices are present in our daily life with many applications: light sources for microsurgery, green laser pointers, or modulators for telecommunication. Most of them use bulk materials such as glass fibres or high-quality crystals, hardly integrable or scalable due to low signal and difficult fabrication. Generating nonlinear or electro-optic effects from materials at the nanoscale can expand the applications to biology and optoelectronics. However, the efficiency of nanostructures is low due to their small volumes.
Here I will show several strategies to enhance optical signals by engineering metal-oxides at the nanoscale with the goal of developing nonlinear and electro-optic photonics devices for a broad spectral range. We use metal-oxides such as barium titanate (BTO) and lithium niobate (LNO) as an alternative platform for nanoscale nonlinear photonics. Recently, we focused on bottom-up assemblies of BTO nanoparticles to obtain electro-optic metasurfaces and quasi phase matching effects (Fig.1).
The field of metal-oxides at the nanoscale has a huge potential of applications in nanophotonics, integrated optics and telecommunication.

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Sprecher: Prof. Dr. Rachel Grange, ETH Zürich

Kontakt: Prof. Dr. M. Chekhova

Thema: Physikalisches Kolloquium WS 2021/2022
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