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physics.optics2026
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 …
physics.optics2024
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…