Photonic implementation of artificial synapses in ultrafast laser inscribed waveguides in chalcogenide glass
Maria Ramos, Vibhav Bharadwaj, Belén Sotillo, Behrad Gholipour, Argyro N. Giakoumaki, Roberta Ramponi, Shane Michael Eaton, Cesare Soci · Applied Physics Letters · 2021
Simple and direct prototyping methods are ideal for large-scale delivery of cognitive photonic hardware. Here, we choose ultrafast laser writing as a direct fabrication technique to later demonstrate all-optical synaptic-like performance along the laser-written waveguides in a chalcogenide glass. Neuronal communication protocols, such as excitatory and inhibitory responses, temporal summations, and spike-timing-dependent plasticity, are shown in the glass chip. This work manifests the potential for large-scale delivery of fully integrated photonic chips based on cognitive principles by single-step fabrication procedures.