Sub-picosecond polarization control is a fundamental functionality for several applications, from information encoding to probing of chemical systems such as chiral molecules. We present an all-optically reconfigurable AlGaAs metasurface, showing giant dichroism modulation upon investigation via ultrafast pump-probe spectroscopy. By combining modelling of carriers excitation and relaxation processes with full-wave electromagnetic simulations, we can attribute the relevant transient features to pump-induced band-filling effect, opening a gain region in the spectral range of a sharp resonance of the structure.
Ultrafast Polarization Control via All-Optical Modulation in Anisotropic Metasurfaces
Crotti G.;Akturk M.;Schirato A.;Maiuri M.;Cerullo G.;Della Valle G.
2023-01-01
Abstract
Sub-picosecond polarization control is a fundamental functionality for several applications, from information encoding to probing of chemical systems such as chiral molecules. We present an all-optically reconfigurable AlGaAs metasurface, showing giant dichroism modulation upon investigation via ultrafast pump-probe spectroscopy. By combining modelling of carriers excitation and relaxation processes with full-wave electromagnetic simulations, we can attribute the relevant transient features to pump-induced band-filling effect, opening a gain region in the spectral range of a sharp resonance of the structure.File in questo prodotto:
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