Our group has a new publication in the journal "Optica". The paper by Dr. Frederik Thiele and Niklas Lamberty demonstrates how a cryogenic circuit for controlling photons is made possible for the first time, and faster than previously possible. More information can be found in the Paderborn University press release. The publication itself can be found here.

Last Friday the MQO group gathered to have a last dinner together with our guest researcher Phichai Youplao, who stayed in our group for one year. He joined our group through the ERC project (QuESADILLA) to work on a quantum key distribution (QKD) scheme he proposed.  Besides working in the lab to build his experiment, he also joined our “hut seminar” in Austria last year, which was a lot of fun. 

This year, Frederik Thiele had the opportunity to present new results on the topic of cryogenic quantum optics at the CLEO conference. This conference focuses on current topics in the fields of lasers and electro-optics. At the event in Long Beach, California, the presentation “Cryogenic Feedforward of a Photonic Quantum State” was delivered, which sparked lively discussions and exchanges. The long journey was also combined with a visit to a…

At the "SPIE DCS 2025" conference in Orlando, Florida, our group member Timon Schapeler presented an invited talk. The title is: "Optimizing photon-number resolution with superconducting nanowire multi-photon detectors". Throughout the conference, he was able to discuss with other members of the community and make new connections.

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.