We have openings for both an exciting PhD position as well as a challenging 3-year postdoc position: studying and leveraging exciton resonances in monolayer 2D semiconductors to realize actively-tunable and multifunctional 2D metasurfaces! Find the full project description on the UvA website here: PhD, postdoc.

Congratulations Tom and Bernardo!!

Check out our recent paper in Nature Photonics where we combine plasmonic Purcell enhancement of exciton radiation with the electrically tunable quantum efficiency of monolayer WS₂ to demonstrate an 2D excitonic metasurface that functions as a free-space optical modulator!

In our latest paper in Nanophotonics, we systematically study the influence of the substrate on the observed line shape in reflection measurements of monolayer 2D semiconductors. A detailed scattered-field analysis highlights an intuitive understanding of the interference of the exciton radiation and substrate reflection. We also show how an index-matched configuration enables a direct estimate of the quantum mechanical rephrasing rate, even at room temperature!

Check out our new paper in Advanced Materials where we demonstrate 2.8-micron thin crystalline silicon solar cell with an 11.2% efficiency using a metasurface for broadband light trapping and antireflection. Delicate design of multiple Mie resonances across the solar spectrum combined with engineered diffraction channels enable highly efficient light absorption. At the same time, the nanotextured silicon surface exhibits uniquely good surface passivation using a thin conformal oxidation layer.

Congratulations Juliette!!

Congratulations Alex!!