SPARK : Sequential parametric amplification on Thin film KTP

Research question
Squeezed light is key for quantum-enhanced sensing and communication, but current sources rely on bulky, power-intensive systems. Integrated waveguides promise portability and scalability, but today’s dominant material, lithium niobate on insulator (LNOI), suffers from fabrication limitations, lattice damage, and restricted nonlinear performance. This project develops a chip-scale alternative by introducing potassium titanyl phosphate on insulator (KTPOI) as a new integrated photonics platform. It combines this material with cascaded parametric amplification to improve performance and loss tolerance. Sequential amplification enhances squeezing at each stage, enabling efficient operation at low pump power. The work includes both fabrication and theoretical design tailored to material properties.

Sustainability aspects
The project enables energy-efficient, compact photonic devices operating at much lower power than existing systems. Integration reduces the need for large infrastructure, enabling portable and potentially battery-powered quantum technologies. Scalable, low-footprint devices support greener communication, sensing, and diagnostics. Accessible, laser-based fabrication lowers costs, reduces chemical use, and broadens participation in advanced photonics. The project also promotes social sustainability through applications in health diagnostics and inclusive research leadership, contributing to equitable and resource-efficient quantum technologies.