21 citations · 32 across the 5 of their papers we have counts for
7 papers · 1 filter
Radially and azimuthally pure vortex beams from phase-amplitude metasurfaces
Michael de Oliveira, Marco Piccardo, Sahand Eslami +3
To exploit the full potential of the transverse spatial structure of light using the Laguerre-Gaussian basis, it is necessary to control the azimuthal and radial components of the…
Optical vortex crystals with dynamic topologies
Marco Piccardo, Michael de Oliveira, Andrea Toma +3
Vortex crystals are geometric arrays of vortices found in various physics fields, owing their regular internal structure to mutual interactions within a spatially confined system.…
Recent twists in twisted light: A perspective on optical vortices from dielectric metasurfaces
Marco Piccardo, Antonio Ambrosio
Optical vortices are the electromagnetic analogue of fluid vortices studied in hydrodynamics. In both cases the traveling wavefront, either made of light or fluid, is twisted like…
Arbitrary polarization conversion for pure vortex generation with a single metasurface
Marco Piccardo, Antonio Ambrosio
The purity of an optical vortex beam depends on the spread of its energy among different azimuthal and radial modes. The smaller is this spread, the higher is the vortex purity and…
Mode-locked ultrashort pulses from an 8 m wavelength semiconductor laser
Johannes Hillbrand, Nikola Opacak, Marco Piccardo +4
Quantum cascade lasers (QCL) have revolutionized the generation of mid-infrared light. Yet, the ultrafast carrier transport in mid-infrared QCLs has so far constituted a seemingly…
In-phase and anti-phase synchronization in a laser frequency comb
Johannes Hillbrand, Dominik Auth, Marco Piccardo +5
Coupled clocks are a classic example of a synchronization system leading to periodic collective oscillations. This phenomenon already attracted the attention of Christian Huygens b…