327 citations · 1.7k across the 23 of their papers we have counts for
23 papers
Active control of phase matching in nonlinear metasurfaces using Pancharatnam--Berry phase
Madona Mekhael, Roman Calpe, Tommi K. Hakala +2
Reconfiguring the spectral output of nonlinear metasurfaces after fabrication remains challenging. We address this by exploiting the nonlinear Pancharatnam--Berry phase of …
Controlling Raman enhancement in particle-aperture hybrid nanostructures by interlayer spacing
Kabusure M. Kabusure, Petteri Piskunen, Jarkko J. Saarinen +2
Here we show how surface-enhanced Raman spectroscopy (SERS) features can be fine-tuned in optically active substrates made of layered materials. To demonstrate this, we used DNA-as…
Phase-Matched Second-Harmonic Generation from Metasurfaces Inside Multipass Cells
Madona Mekhael, Timo Stolt, Anna Vesala +4
We demonstrate a simple and scalable approach to increase conversion efficiencies of nonlinear metasurfaces by incorporating them into multipass cells and by letting the pump beam…
Multi-mode lasing in supercell plasmonic nanoparticle arrays
Rebecca Heilmann, Kristian Arjas, Tommi K. Hakala +1
Multicolour light sources can be used in applications such as lighting and multiplexing signals. In photonic and plasmonic systems, one way to achieve multicolour light is via mult…
Raman Enhancement in Bowtie-Shaped Aperture-Particle Hybrid Nanostructures Fabricated with DNA-Assisted Lithography
Kabusure M. Kabusure, Petteri Piskunen, Jiaqi Yang +2
We report on efficient surface-enhanced Raman spectroscopy (SERS) supporting substrates, which are based on DNA-assisted lithography (DALI) and a layered configuration of materials…
Scattering Dominated Spatial Coherence and Phase Correlation Properties in Plasmonic Lattice Lasers
Janne I. Heikkinen, Benjamin Asamoah, Roman Calpe +3
We present a comprehensive study of the polarization and spatial coherence properties of the lasing modes supported by a 4-fold symmetric plasmonic lattice. By modifying only, the…