Reinhard Geiß

Development of large lithium niobate wafer for tunable Fabry-Pérot interferometer

M. Sigwarth, Tino Benkenstein, Sascha Ehrhardt, Falk X. Eilenberger et autres

For a solar full-disc imaging spectrometer with a 200-mm clear aperture solar telescope, a lithium niobate (LiNbO₃) crystal-based Fabry–Pérot interferometer with a clear aperture of 100 to 120 mm would be required. Such a wafer, polished and coated to the required specifications, …

de (code pays fourni par la source)

Photonic Quantum Processor for Novel Applications

Monika Monika, Carlos Sevilla-Gutiérrez, Dmitriy Mitin, Idoia Ugarte Olcoz et autres

We present a quantum photonic processor featuring 32 modes, with the potential for further scalability. The system demonstrates robustness against extrinsic phase noise, accounting for temperature and acoustic fluctuations. Our initial objective is to tailor this processor for quantum boson sampling (QBS) …

de (code pays fourni par la source)

Fabrication of low-loss lithium niobate on insulator waveguides on the wafer scale [Invited]

Mohammadreza Younesi, Thomas Käsebier, Ilia Elmanov, Yang-Teng Li et autres

We report on the wafer scale fabrication of single-mode low-loss lithium niobate on insulator waveguides utilizing a chemically amplified resist and an optimized dry etching method. The fabricated single-mode waveguides are free of residuals and re-deposition, with measured losses for straight waveguides …

de (code pays fourni par la source)

Fabrication of low-loss lithium niobate on insulator waveguides on the wafer scale

Mohammadreza Younesi, Thomas Käsebier, Ilia Elmanov, Yang-Teng Li et autres

We report on the wafer scale fabrication of single mode low-loss lithium niobate on insulator waveguides utilizing a chemically amplified resist and an optimized dry etching method. The fabricated single mode waveguides are free of residuals and re-deposition, with measured losses for …

New designs and technologies for densely integrated photonics

Thomas Pertsch, Reinhard Geiß, Thomas Siefke, Falk X. Eilenberger et autres

Nanostructuring of versatile high-index photonic materials, like lithium niobate or silicon, offers the dense integration of highly functional devices. We will present our recent advances towards meta devices, including waveguides and metasurfaces, consisting of nanoresonators as their versatile building blocks. Furthermore, we …

de (code pays fourni par la source)

Wafer-scale fabrication of low-loss lithium niobate integrated photonic devices

Reinhard Geiß, Andre Steinbach, Mohammadreza Younesi, Johannes Mühlenstädt et autres

Lithium niobate, and more recently thin film lithium niobate on insulator (LNOI, TFLN), is a widely used material in integrated photonics due to its excellent optical and electro-optic properties. With the increasing demand for high-speed, high integration density photonic devices, lithium niobate …

de (code pays fourni par la source)

Erbium doping of lithium niobate on insulator using low-temperature ion exchange

Mohammadreza Younesi, Daniel S.C. Yang, Wei-Yuan Chung, Hao-Yun Liu et autres

We propose an optimized low-temperature ion exchange method for fabricating an erbium-doped lithium niobate on insulator (LNOI) substrate. This method ensures the production of high-quality, crack-free substrates. The erbium-doped substrates are characterized spectroscopically in the near-infrared wavelength range. Additionally, we demonstrate deterministic …

gb, us, tw, de, pl (code pays fourni par la source)

Integrated Photonic Quantum Sources and Circuits in Lithium Niobate Platform

Tien-Dat Pham, Yixin Lin, Cheng-Chung Chiu, Hung-Pin Chung et autres

We report the study of various passive and active optical elements as building blocks for realizing novel quantum photonic sources and circuits including a highly integrated on-chip Bell state generator and a broadband tunable electro-optic switch, all based on bulk or thin-film …

tw (code pays fourni par la source)

Preparing for a future with quantum technologies: an innovative approach to accessible quantum education

Yash Pathak, Rudrakant Sollapur, Jobst Ziebell, Reinhard Geiß et autres

Quantum science and technology has potential to revolutionize applications in metrology, sensing, imaging, computing, and communication. Preparation for quantum-classical technology integration is crucial for the future scientists. Formal theoretical training in quantum electrodynamics usually requires several hundred hours of coursework, notwithstanding the …

de (code pays fourni par la source)

OPEN SOURCE EXPERIMENTS IN QUANTUM PHOTONICS: AN AFFORDABLE APPROACH

Sebastian Ritter, Johannes Kretzschmar, Falko Sojka, Thomas Kaiser et autres

Appears in: EDULEARN22 Proceedings Publication year: 2022Page: 4278 (abstract only)ISBN: 978-84-09-42484-9ISSN: 2340-1117doi: 10.21125/edulearn.2022.1018Conference name: 14th International Conference on Education and New Learning TechnologiesDates: 4-6 July, 2022Location: Palma, Spain

AUGMENTED AND VIRTUAL REALITY IN SCIENCE LAB TRAINING

Thomas Kaiser, Johannes Kretzschmar, Christian Helgert, Reinhard Geiß et autres

Appears in: EDULEARN22 Proceedings Publication year: 2022Page: 4690 (abstract only)ISBN: 978-84-09-42484-9ISSN: 2340-1117doi: 10.21125/edulearn.2022.1115Conference name: 14th International Conference on Education and New Learning TechnologiesDates: 4-6 July, 2022Location: Palma, Spain

Digital teaching in photonics: new possibilities for lab work training programs

Thomas Kaiser, Tzu-Huan Lin, Johannes Kretzschmar, Falko Soika et autres

New technologies rapidly lead to many new possibilities for digital teaching concepts of labwork training programs, which might be on-site or remotely. Mixed Reality is a promising candidate to meet the learning goals.

de (code pays fourni par la source)