Freiburg 2019 – wissenschaftliches Programm

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FM: Fall Meeting

FM 9: Quantum Networks: Platforms and Components I

FM 9.7: Talk

Montag, 23. September 2019, 15:30–15:45, 1098

Integration of electro-optical devices in LiNbO₃ for quantum-optic applications — •Felix vom Bruch, Silia Babel, Raimund Ricken, Victor Quiring, Harald Herrmann, and Christine Silberhorn — Universität Paderborn, Warburger Str. 100, 33098 Paderborn

The interest in practical quantum technologies has been steadily increasing over the last years. Many concepts are based on the utilisation of light and its quantum properties for encoding and transferring information. Comparable to integrated electronic devices, integrated electro-optical elements enable one to scale complex laboratory setups down to convenient and handy dimensions. Furthermore, this approach is suitable for an effective reduction of the expense for setups and experiments. From many numerous telecom applications it is well known that ferroelectric LiNbO₃ provides an excellent platform for devices, e.g. frequency converters or phase and polarization modulators. For this purpose, the non-linear electro-optic properties of this material can be used to tailor conversion processes and modulators. Functionalities and characteristics of the latter are mainly governed by the design of the deployed electrodes. However, scaling and integration of devices for quantum-optic applications remains challenging in terms of performance and robustness. To overcome this challenge, detailed studies of different concepts and architectures are required. Here the influence of silicon dioxide layers, used as buffer layers for modulator electrodes, is examined systematically in terms of e.g. excess loss, switching behaviour and long-term stability.