  We report the fabrication and electron transport properties of nanoparticles
self-assembled networks (NPSAN) of molecular switches (azobenzene derivatives)
interconnected by Au nanoparticles, and we demonstrate optically-driven
switchable logical operations associated to the light controlled switching of
the molecules. The switching yield is up to 74%. We also demonstrate that these
NPSANs are prone for light-stimulable reservoir computing. The complex
non-linearity of electron transport and dynamics in these highly connected and
recurrent networks of molecular junctions exhibit rich high harmonics
generation (HHG) required for reservoir computing (RC) approaches. Logical
functions and HHG are controlled by the isomerization of the molecules upon
light illumination. These results, without direct analogs in semiconductor
devices, open new perspectives to molecular electronics in unconventional
computing.
