Micro-transfer Printing of STO for Scalable Quantum Photonics

Photonic quantum computing requires highly efficient cryogenic control elements to scale beyond current system sizes. Strontium titanate (STO) has recently emerged as a promising material for cryogenic phase shifting and piezoelectric actuation, but scalable integration onto low-loss photonic platforms remains unresolved.

This PhD will develop thin-film crystalline STO technology and novel micro-transfer-printing methods to integrate STO devices onto silicon nitride and AlOx photonic circuits. The work combines material engineering, nanofabrication, heterogeneous integration, and photonic device characterization. Successful demonstration of transfer-printed STO phase shifters would provide a scalable route toward next-generation photonic quantum processors.