Hannover 2020 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 43: Quantum Optics and Photonics

Q 43.2: Talk

Thursday, March 12, 2020, 11:15–11:30, f342

General framework for the analysis of imperfections in integrated nonlinear devices for quantum optics applications — •Matteo Santandrea, Michael Stefszky, and Christine Silberhorn — Integrated Quantum Optics, Paderborn University, Warburgerstr. 100, 33098, Paderborn, Germany

Integrated nonlinear (NL) devices are necessary for the efficient realisation of many quantum communication and computation protocols and their future implementation in everyday life. However, the performance metrics of these devices, such as maximum conversion efficiency and spectral purity, are drastically affected by the presence of imperfections, e.g. fabrication errors or inhomogeneous operating conditions. Therefore, it is important to study the impact of imperfections on the NL properties of integrated devices.

Here, we present a novel framework for the analysis of performance degradation in NL systems in the presence of imperfections. Our framework highlights the hidden similarities among NL processes realised in different technological platforms and is thus able to describe the behaviour of a wide variety of integrated NL systems. We show that this framework provides a simple design rule to ensure the realisation of devices with nearly ideal spectral properties and we apply it to study the impact of imperfections on the performance of lithium niobate and lithium niobate on insulator waveguides.