This task aims to pave the way for heterogeneous integration on the silicon photonics platform of STM for high-speed and high-efficiency modulation application, including optical amplification. For III-V materials, direct-bonding and micro-transfer printing approaches are explored. Other materials with Pockels properties are studied (BTO, LNOI, and polymers), from process integration development to functional demonstrators, aiming for high-speed devices exhibiting bandwidth higher than 100 GHz.