Backward phase-matched second-harmonic generation from stacked metasurfaces

Timo Stolt (1) , Jeonghyun Kim (2) , Sébastien Héron (3) , Anna Vesala (1) , Mikko J Huttunen (2) , Robert Czaplicki (2) , M. Kauranen (1) , Junsuk Rho (2) , Patrice Genevet (3)

1 University of Tampere [Finland]
2 POSTECH - Pohang University of Science and Technology
3 CRHEA - Centre de recherche sur l'hétéroepitaxie et ses applications

We demonstrate phase-matched second-harmonic generation (SHG) from three-dimensional meta-materials consisting of stacked metasurfaces. To achieve phase matching, we utilize a novel mech-anism based on phase engineering of the metasurfaces at the interacting wavelengths, facilitatingphase-matched SHG in the unconventional backward direction. By stacking up to five metasurfaces,we obtain the expected factor of 25 enhancement in SHG efficiency. Our results motivate furtherinvestigations to achieve higher conversion efficiencies also with more complex wavefront

Keywords: RESONANCES; OPTICS; LIGHT

Domains: Physics [physics]

Timo Stolt, Jeonghyun Kim, Sébastien Héron, Anna Vesala, Mikko J Huttunen, et al.. Backward phase-matched second-harmonic generation from stacked metasurfaces. 2021. ⟨hal-03167871⟩