We congratulate Julian Rische for successfully defending his Bachelor thesis with the title “Characterizing spontaneous parametric down-conversion with a time-of-flight spectrometer”.

Last week, five members of our group participated in the Spring Meeting of the Atoms, Molecules, Quantum Optics, and Photonics Section of the German Physical Society (DPG SAMOP). The conference was held in Bonn from March 8th to 14th. Our group contributed with the following presentations: Aishi Barua: Towards enhanced homodyne detection with a squeezed local oscillator (Poster) Niklas Lamberty: Cryogenic Feedforward of a Photonic Quantum…

Last week Prof. Tim Bartley attended the SPIE Photonics West Conference in San Fransisco. He presented an invited talk with the title: "Interfacing superconducting nanowire single photon detectors with cryogenic opto-electronics in lithium niobate for quantum photonic applications" and had a chance too meet many expert colleagues in the SNSPD community.

Last Friday we had our "Group Reflection Meeting". At this meeting, which we organize twice a year, we discuss topics that are important to us as a group. This time it was about equality in physics, scientific writing and working with superconducting detectors. After our meeting, we met at the Christmas market in Paderborn to eat something and drink Glühwein. Afterwards, we went Eisstockschießen, where we played against each other in two teams…

Last week three members of our group joined the BMBF Quantum Futur status meeting in Hannover. All Quantum Futur grant recipients had the chance to present their work and future plans. Prof. Bartley showed our results on cryogenic integrated optoelectronics, including our latest cryogenic feedforward experiment. We also presented a poster on everything our group did on cryogenic frequency conversion and single-photon detectors in the past years…

At the end of a very successful conference in Edinburgh (Single Photon Workshop), Team MQO did the escape room "The Space Academy" by Locked In Edinburgh and successfully escaped.

The "Single Photon Workshop 2024" took place this year in Edinburgh, Scotland. Five members of our group presented their work in the poster session or during a talk. Frederik Thiele: "Reading out SNSPDs with Opto-Electronic Converters" (Talk) Frederik Thiele: "Gating SNSPDs with a Cryogenic Photodiode" (Poster) Niklas Lamberty (& Frederik Thiele): "Cryogenic Feedforward of a Quantum State" (Poster) Timon Schapeler: "Scalable Quantum…

We congratulate Niklas Lamberty for successfully defending his master thesis about "Cryogenic electronic interconnects between superconducting nanowire single photon detectors and electro-optics for feed-forward". We are happy that he will stay in the group to continue with his PhD. 

Last Friday, we enjoyed a sunny afternoon in the Haxtergrund, which is a forest park close to university. Just before the time change, we went on an easy group hike together to make use of one of the last days with longer daylight. The weather was awesome, providing a lot of sunlight and about 20°C for our group event. We all enjoyed the hike and the great view we had on the colorful autumn trees.

In our latest publication from Timon Schapeler, we have collaborated with the Paderborn Center for Parallel Computing (PC2) to combine the two fields of experimental quantum optics and high-performance computing for the first time. We provided the experimental data on a large scale quantum detector, capable of detecting one million photons, to characterize it in a quantum mechanically consistent way. Due to the size of the detector (and thus the…

We took lots of videos and photos during our “Hut Seminar 2024”. We have now created a YouTube video from this material. You can find it here on YouTube. We also have a link to our website here, where you can also watch the video and get additional information.

Last week, we had an amazing time at Quantum Photonics Spotlight 2024 (QPS 2024). It was the first international conference organized by the Institute for Photonic Quantum Systems (PhoQS) at the Congress Centre of the Heinz Nixdorf Museums Forum (HNF) in Paderborn. Five members from our group showcased their research through posters, contributing to a vibrant exchange of ideas and insights throughout the event. These are our contributions: Ai…

Last week, three of our female scientists attended the Workshop “PHOTONICS FUTURE. Profound | Equal | Inclusive” which took place for the second time in Bad Driburg. The 1,5-day workshop was organized as a joint event between the Institute for Photonic Quantum Systems (PhoQS) and the CRC TRR 142. During the workshop, renowned female scientists were invited to share their latest research results and to present insights into their career paths. The…

At the end of August, our group once again did a 'hut seminar' in the mountains. The entire group travelled to Schoppernau in Vorarlberg, Austria. During the week, we discussed both scientific and non-scientific topics and were able to get to know each other even better. Of course, we also went on some hikes in the mountains. You can find more information and pictures on this page.

Our main tool for quantum optics are single photon detectors. We especially use superconducting single-photon detectors since they are one of the best performing detectors on the market. However, these detectors require cryogenic operation temperatures. That means for us that we can only operate a limited number of detectors in a single cryostat. To conduct experiments with more detectors and show more elaborate setups, we require more scalable…