Nonlinear metasurfaces are highly promising for controlling harmonic properties such as spectrum, polarization, phase, and directionality [1]. Notable applications include generating structured light via nonlinear processes like second- and third-harmonic generation [1-7]. Two main approaches enable this: (i) tuning optical resonances [2,3] and (ii) employing nonlinear Pancharatnam-Berry (PB) metasurfaces [4-7]. While the first requires precise fabrication and high computational resources, the latter simplifies design using in-plane rotations to build the look-up tables. However, nonlinear PB metasurfaces with strong nonlinear responses from semiconductors remain underexplored.
AlGaAs Nonlinear Pancharatman-Berry Metasurfaces
Carletti L.;Franceschini P.;Tognazzi A.;Rocco D.;Vincenti M. A.;de Ceglia D.;De Angelis C.;
2025-01-01
Abstract
Nonlinear metasurfaces are highly promising for controlling harmonic properties such as spectrum, polarization, phase, and directionality [1]. Notable applications include generating structured light via nonlinear processes like second- and third-harmonic generation [1-7]. Two main approaches enable this: (i) tuning optical resonances [2,3] and (ii) employing nonlinear Pancharatnam-Berry (PB) metasurfaces [4-7]. While the first requires precise fabrication and high computational resources, the latter simplifies design using in-plane rotations to build the look-up tables. However, nonlinear PB metasurfaces with strong nonlinear responses from semiconductors remain underexplored.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
