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Logo Institut für Elektrische Messtechnik und Grundlagen der Elektrotechnik der TU Braunschweig
Julius Ritter, M. Sc.
  • Team
    • Prof. Dr. Meinhard Schilling
    • Prof. Dr. Oleksandr Dobrovolskiy
    • Dr.-Ing. Thilo Viereck
    • Dr.-Ing. Benedikt Hampel
    • Dr. Aidin Lak
    • Dr. Igori Bogus
    • Dr. Anton Pokusinskyi
    • Rabia Amin, M. Phil.
    • Janine Gläßner, M. Sc.
    • Dominik Hanisch, M. Sc.
    • Dr. med. Andreas Höft
    • Denis Kajevic, M. Sc.
    • Mona Khazaeizadeh, M. Sc.
    • Dr.-Ing. Dezhen Li
    • Julius Mumme, M. Sc.
    • Marius Neumann, M. Sc.
    • Max Pröpper, M. Sc.
    • Julius Ritter, M. Sc.
    • Dr.-Ing. Dennis Rühmer
    • Rebecca Sack, M. Sc.
    • Marjan Schubert, M. Sc.
    • Dir. u. Prof. PD Dr. Uwe Siegner
    • Marc-André Tucholke, M. Sc.
    • Yihao Wang, M. Sc.
    • Florian Wolgast, M. Sc.

Julius Ritter, M. Sc.

My research area

THz microscope

Julius Ritter, M. Sc.
Paul Julius Ritter
124 | LENA
+49 531 391 65414
p.ritter(at)tu-braunschweig.de
Publications

2025

High-Tc Josephson Junction Arrays Fabricated by He-FIB
Max Pröpper, Dominik Hanisch, Christoph Schmid, Marius Neumann, Paul Julius Ritter, Marc-André Tucholke, Edward Goldobin, Dieter Koelle, Reinhold Kleiner, Meinhard Schilling, Benedikt Hampel
in IEEE Transactions on Applied Superconductivity, vol. 35, no. 5, pp. 1-5, Aug. 2025, Art no. 1100105
doi: 10.1109/TASC.2024.3516741

2024

A Low-Power Cryogenic Analog Electrode Signal Processing Unit for Shuttling Operations in a Trapped-Ion Quantum Computer
Alexander Meyer, Zhaoqun Guo, Marius Neumann, Paul Julius Ritter, Jens Repp, Matthias Brandl, Meinhard Schilling, Vadim Issakov
2024 IEEE European Solid-State Electronics Research Conference (ESSERC), Bruges, Belgium, 2024, pp. 484-487
doi: 10.1109/ESSERC62670.2024.10719432

A Low-Power, High-Swing LDMOS Driver Amplifier for Shuttling Controller in a Trapped-Ion Quantum Computer Operating at 4 K
Zhaoqun Guo, Alexander Meyer, Adilet Dossanov, Paul Julius Ritter, Marius Neumann, Jens Repp, Matthias Brandl, Meinhard Schilling, Vadim Issakov
2024 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS), Fort Lauderdale, FL, USA, 2024, pp. 54-57
doi: 10.1109/BCICTS59662.2024.10745686

A Single-Stage 24 Gb/s 8:1 Cryogenic Multiplexer for Josephson Arbitrary Waveform Synthesizer
Yerzhan Kudabay, Paul Julius Ritter, Vadim Issakov
2024 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS), Fort Lauderdale, FL, USA, 2024, pp. 58-61
doi: 10.1109/BCICTS59662.2024.10745656

Model Verification Of U-shaped Antenna Designs For THz Imaging Using Josephson Junctions
Paul Julius Ritter, Marius Neumann, Max Pröpper, Dominik Hanisch, Finn-Niclas Stapelfeldt, Julius Mumme, Meinhard Schilling, Benedikt Hampel
2024 49th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Perth, Australia, 2024, pp. 1-2
doi: 10.1109/IRMMW-THz60956.2024.10697863

THz Properties of He-FIB YBa2Cu3O7-x Josephson Junctions
Max Pröpper, Dominik Hanisch, Chistoph Schmid, Paul Julius Ritter, Marius Neumann, Edward Goldobin, Dieter Koelle, Reinhold Kleiner, Meinhard Schilling, Benedikt Hampel
in IEEE Transactions on Applied Superconductivity, vol. 34, no. 3, pp. 1-5, May 2024, Art no. 1100505
doi: 10.1109/TASC.2024.335314

 

2023

Antenna Designs for Efficient Coupling to Josephson Junctions for THz Microscopy
Paul Julius Ritter, Finn-Niclas Stapelfeldt, Marco Tollkühn, Dominik Hanisch, Max Pröpper, Meinhard Schilling, Benedikt Hampel
IEEE Transactions on Applied Superconductivity 33 (5), 1-52 - 2023
doi: 10.1109/TASC.2023.3249132

Design and Characterization of a Hairpin Filter at GHz Frequencies Using a THz Microscope for Near-Field Analysis
Paul Julius Ritter, Marius Neumann, Julius Mumme, Meinhard Schilling, Benedikt Hampel
48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Montreal, QC, Canada, 2023, pp. 1-2
doi: 10.1109/IRMMW-THz57677.2023.10299026

High-Tc Josephson Junction Arrays for THz Applications
Dominik Hanisch, Max Pröpper, Paul Julius Ritter, Marco Tollkühn, Meinhard Schilling, Benedikt Hampel
in IEEE Transactions on Applied Superconductivity, vol. 33, no. 5, pp. 1-5, Aug. 2023, Art no. 1501105
doi: 10.1109/TASC.2023.3257285

Near-field Characterization of a GHz Branchline Coupler Using a THz Microscope
Marius Neumann, Paul Julius Ritter,  Julius Mumme, Meinhard Schilling, Benedikt Hampel
48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Montreal, QC, Canada, 2023, pp. 1-2
doi: 10.1109/IRMMW-THz57677.2023.10299243

THz Microscopy With Josephson Cantilevers for Characterization of Additive Manufactured Spiral Phase Plates
Marco Tollkühn, Paul Julius Ritter, Dominik Hanisch, Max Pröpper, Meinhard Schilling, Benedikt Hampel
in IEEE Transactions on Applied Superconductivity, vol. 33, no. 5, pp. 1-5, Aug. 2023, Art no. 2500205,
doi: 10.1109/TASC.2023.3261260

 

2022

Characterization of multi-frequency emission of far-infrared laser with Josephson junctions in a THz microscope
Paul Julius Ritter, Marco Tollkühn, Meinhard Schilling, Benedikt Hampel
2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Delft, Netherlands, 2022, pp. 1-2

THz microscope for three-dimensional imaging with superconducting Josephson junctions
Marco Tollkühn, Paul Julius Ritter, Meinhard Schilling, Benedikt Hampel
Review of Scientific Instruments 93, 043708 - 2022
doi: 10.1063/5.0084207

THz Microscopy of Light Modes Generated with Additive Manufactured Spiral Phase Plates
Marco Tollkühn, Paul Julius Ritter, Meinhard Schilling, Benedikt Hampel
2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Delft, Netherlands, 2022, pp. 1-2
doi: 10.1109/IRMMW-THz50927.2022.9895987

Graduate Theses

MA | Simulation and measurement of antennas in the gigahertz to terahertz range
THz-Antenne
THz-Antenne

In the THz microscope at the EMG, three-dimensional field distributions are measured with a sensor up to around 5 THz. The sensor is a so-called Josephson cantilever, which consists of a high-temperature superconductor on a substrate. In order to achieve a high sensitivity of the sensor, antennas are used to improve the field coupling. As part of this final thesis, our new manufacturing process will be used to improve proven antennas and design new antennas. Together with customised filter circuits, the components will then be measured under a THz microscope.

Previous knowledge: Basic understanding of electromagnetic fields

Keywords: simulation, CST Microwave Studio, high-temperature superconductors, antennas

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