SAMOP 2023 – scientific programme

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QI: Fachverband Quanteninformation

QI 24: Integrated Photonics II (joint session Q/QI)

QI 24.6: Talk

Wednesday, March 8, 2023, 18:15–18:30, A320

Influence of doping on the optical characteristics in lithium niobate — •Laura Bollmers, Laura Padberg, Christof Eigner, and Christine Silberhorn — Paderborn University, Integrated Quantum Optics, Institute for Photonic Quantum Systems (PhoQS), Warburger Str. 100, 33098 Paderborn, Germany

Lithium niobate (LN) is a well-established material in integrated optics, and it is commonly used in nonlinear photonics. To make LN more versatile, material doping is crucial in improving the device’s applicability. Depending on the doping material and concentration, different applications can be realised, e.g. Titanium doping can be used for waveguide fabrication, an essential part of integrated optics. Zinc doping can shift a bandgap to the UV region, enabling the material for UV/VIS application. Erbium doping enables applications for optical amplification, used for integrated laser sources, or quantum optical applications like memories.
Thus, doping LN can lead to a performance boost for optical applications. Especially in thin-film lithium niobate there are completely new application possibilities for doped substrate material. For optimisation, the interplay of experimental analysis and theoretical material modelling is crucial. So, we investigate the absorption spectra influenced by different dopants at different temperatures and show our latest results.