Erlangen 2022 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 17: Quantum Optics (Miscellaneous) III

Q 17.3: Vortrag

Dienstag, 15. März 2022, 11:15–11:30, Q-H14

Exploiting electro-optic modulators in LiNbO₃ for quantum-optics applications — •Felix vom Bruch, Christof Eigner, Harald Herrmann, and Christine Silberhorn — Paderborn University, Integrated Quantum Optics, Institute of Photonic Quantum Systems (PhoQS), Warburger Str. 100, 33098 Paderborn

Within the last decades, research and development on quantum technologies has been a vivid field and the interest and investment in those technologies has been steadily increasing. Many of the most promising approaches are based on using and manipulating light and its properties. In many quantum optic setups, the manipulation is performed by means of bulk optic modulators. Yet, the performance limitations hinder further development in terms of data processing rates. Here, we present our latest progress in replacing bulk optic modulators by their integrated counterparts in free space setups and exploit the accompanied benefits of these novel hybrid approaches.
The used platform on which our modulators are implemented is titan-in-diffused waveguides in LiNbO₃. Here, different crystal cuts enable us to implement different types of modulators such as electro-optic polarization converters. Challenges that need to be overcome are spectral limitations, switching speed and electro-optic performance as well as device stability. Additionally, maintaining full applicability even on a single photon regime, requires very low optical losses. We are focusing on comparing advantages and disadvantages of different modulator architectures and further exploit their experimental implementation in quantum optic experiments.