Seminar in Biarritz

Great opportunity for discussion on fabrication, simulation, and ongoing projects in integrated optics for the Neuromorphic Quantumphotonics Group from Heidelberg and the Responsive Nanosystems Group in Münster on a five-day seminar in Biarritz, France. We had intense exchange of ideas and thoughts not only during the seminar hours, but also during dinners and walks at the sunny beach - surfing was also offered.

International Workshop on Physical Computing, October 29 - November 6, 2022 in Erice, Sicily/Italy

The International workshop on Physical Computing took place from October 29 until November 6, 2022, in Erice, a picturesque medieval town in Sicily.

The days were filled with enlightening and motivating talks covering the entire field of physical computing. Leading scientists in the fields of photonic computing, nanofabrication, and quantum computing presented their actual research. During the poster sessions and the breaks, the participants of the workshop were able to exchange and discuss ideas. Congratulation to Fabian Beutel (Pixel Photonics) and Xin, CJ (Harvard John A. Paulson School Of Engineering And Applied Sciences) for winning the best short talk and poster awards, respectively!

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EU funded projects



By switching to the optical domain and nanophotonic circuits PHOENICS will set a new paradigm in artificial intelligence and neuromorphic computing.

The PHOENICS architecture is based on the hybrid integration approach of three different chip platforms: optical input generation in silicon nitride signal encoding and modulation in indium-phosphidneuromorphic processing and detection in silicon. 

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Munich Quantum Valley

The HEI-group develops fast electo-optic modulators operating at a 698 nm and 317 nm wavelength to generate optimal signals for the consortium. The final goal is to fabricate a network of modulators with a modulation bandwidth of 5 GHz and a modulation depth of 60 dB, thus reaching unprecedented control. The device will be modular, accessible via fiber-coupling and wire-bonding to a PCB. The design will provide high spatial and temporal control allowing for the manipulation of hundreds of atoms on a single-atom precision.

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HYBRAIN’s vision is to realize a radically new technology for ultra-fast and energy-efficient edge AI inference based on a world-first, unique, brain-inspired hybrid architecture of integrated photonics and unconventional electronics with collocated memory and processing. As the most stringent latency bottleneck in CNNs arise from the initial convolution layers, we will take advantage of the ultrahigh throughput and low latency of photonic convolutional processors (PCPs). Their output is processed using cascaded analog electronic linear and novel nonlinear classifier layers.

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BMBF funded projects


Within the PhoQuant project our group is responsible for developing photon-number resolving (PNR) detectors based on superconducting nanowire detectors (SNSPDs). Waveguide SNSPDs with photonic beam splitter networks and PNR detectors will be realized on Lithium-Niobate-on-Isulator (LNOI) substrates. In addition, our group is working on the development of efficient coupling interfaces to PNR-SNSPDs.

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The project partners of SPINNING are working on a design that features unprecedented connectivity and flexible configurations. In addition, the quantum processor is able to operate with low cooling requirements and thus may be implemented in close proximity to classical computer systems.

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In the QSAMIS project a compact quantum key distribution (QKD) system running at record-high secret key rates is developed. Fast parallelised data transfer is achieved by wavelength-multiplexing and rapid modulation on the sender photonic integrated chip and superconducting nanowire single photon detectors (SNSPDs) on the receiver chip. While Pixel photonics is responsible for the design and fabrication of the receiver module, we at Heidelberg University design the sender chip and the electrical interface.

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This project aims to develop and investigate a complexity reduced high efficiency single photon receiver for quantum key distribution (QKD), which can be used in a variety of applications. Heidelberg University will realize and characterize an on-chip system with 16 detector elements for single- and multi- mode single-photon high system efficiency detection using NbGe waveguide-integrated SNSPDs. High system detection efficiency shall be achieved by optimizing the devices geometry, film deposition and fabrication procedure.

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DFG funded projects

Hybrid 3D

In the field of optical neuromorphic computing, one unsolved question is the one of the optimal material platform to realize photonic integrated circuits.
In order to circumvent this question and profit of the advantages of multiple materials, micro 3D printing is used to combine different material platforms. In the course of this project a low-loss 3D printed photonic interconnection between two chips should be realized.

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22.02.2022 Scientific talk at Deutsche Physikalische Gesellschaft

A photonic machine story – new computing architectures for AI