A5052185484- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Photorefractive and Nonlinear Optics
- Mechanical and Optical Resonators
- Advanced Fiber Optic Sensors
- Neural Networks and Reservoir Computing
- Optical Network Technologies
- Magnetic properties of thin films
- Optical Coatings and Gratings
- Quantum Information and Cryptography
- Magneto-Optical Properties and Applications
- Quantum optics and atomic interactions
- Advanced Memory and Neural Computing
- Phase-change materials and chalcogenides
- Optical and Acousto-Optic Technologies
- Quantum Computing Algorithms and Architecture
- Semiconductor Quantum Structures and Devices
- Neural Networks and Applications
- Quantum and electron transport phenomena
- Advanced Photonic Communication Systems
Xanadu Quantum Technologies (Canada)
2025
Center for NanoScience
2021-2024
CeNTech
2021-2024
University of Münster
2021-2024
Photonics offers a promising platform for quantum computing1–4, owing to the availability of chip integration mass-manufacturable modules, fibre optics networking and room-temperature operation most components. However, experimental demonstrations are needed complete integrated systems comprising all basic functionalities universal fault-tolerant operation5. Here we construct (sub-performant) scale model computer using 35 photonic chips demonstrate its functionality feasibility. This...
Lithium-Niobate-On-Insulator (LNOI) is emerging as a promising platform for integrated quantum photonic technologies because of its high second-order nonlinearity and compact waveguide footprint. Importantly, LNOI allows creating electro-optically reconfigurable circuits, which can be efficiently operated at cryogenic temperature. Their integration with superconducting nanowire single-photon detectors (SNSPDs) paves the way realizing scalable devices active manipulation detection states...
Scalable photonic quantum computing architectures pose stringent requirements on processing devices. The needs for low-loss high-speed reconfigurable circuits and near-deterministic resource state generators are some of the most challenging requirements. Here, we develop an integrated platform based thin-film lithium niobate interface it with deterministic solid-state single-photon sources dots in nanophotonic waveguides. generated photons processed programmable at speeds several gigahertz....
Abstract Efficient fiber-to-chip couplers for multi-port access to photonic integrated circuits are paramount a broad class of applications, ranging, e.g., from telecommunication computing and quantum technologies. Grating-based approaches often desirable providing out-of-plane the circuits. However, on platforms characterized by refractive index ≃ 2 at telecom wavelength, such as silicon nitride or thin-film lithium niobate, limited scattering strength has thus far hindered achievement...
We present an adaptive optical neural network based on a large-scale event-driven architecture. In addition to changing the synaptic weights (synaptic plasticity), network's structure can also be reconfigured enabling various functionalities (structural plasticity). Key building blocks are wavelength-addressable artificial neurons with embedded phase-change materials that implement nonlinear activation functions and nonvolatile memory. Using multimode focusing, function features both...
Reconfigurable photonic integrated circuits enable high-bandwidth signal shaping with the prospect for scalability and compact footprint. Cointegration of electro-optical tunability nonvolatile attenuation through functional materials allows implementing devices that operate on both phase amplitude. Based this approach, we propose an design optical pattern generation deploying a continuous-wave laser single electrical function generator. We employ reconfigurable phase-change material Ge 2 Sb...
In this experimental study, we explore the potential implementation of logic operations using interference propagating spin waves within a device composed intersecting yttrium iron garnet waveguides with submicrometer width. Our investigation reveals significant influence finite-size effects on performance microscopic devices. particular, observe that their efficiency depends wavelengths involved in relation to size region and is reduced by multimode spin-wave propagation. These findings...
We experimentally demonstrate a simple design for spin-wave frequency demultiplexer based on submicrometer-width yttrium iron garnet waveguides intersecting at an angle of 30°. show that, depending the frequency, spin waves excited in input arm device are predominantly directed to one two output arms. This routing is characterized by large extinction ratio about 10. The response can be efficiently controlled changing static magnetic field and geometry device. Due small intersection symmetry...
In the realm of advanced computing and signal processing, need for optimized data processing methodologies is steadily increasing. With world producing vast quantities data, architectures necessitate to be swifter more energy efficient. Edge such as NetCast architecture [1] combine strength electronic photonic by outsourcing multiply-accumulate operations (MAC) optical domain. Herein we demonstrate a hybrid architecture, combining advantages FPGA facilitating an ultra-low power...
Abstract Efficient fiber-to-chip couplers for multi-port access to photonic integrated circuits are paramount a broad class of applications, ranging, e.g., from telecommunication computing and quantum technologies. Grating-based approaches often desirable providing out-of-plane the circuits. However, on platforms characterized by refractive index ≃2 at telecom wavelength, such as silicon nitride or thin-film lithium niobate, limited grating strength has thus far hindered achievement coupling...
We study degenerate spontaneous parametric downconversion in a structure composed of two linearly uncoupled resonators, which the linear properties fundamental and second-harmonic field can be engineered independently. As an example, we show that this system it is simple to generate photon pairs are nearly uncorrelated energy. These results extend use resonators case second-order nonlinear interactions.
Squeezed states are essential for continuous variable (CV) quantum information processing, with wide-ranging applications in computing, sensing and communications. Integrated photonic circuits provide a scalable, convenient platform building large CV circuits. Thin-film Lithium Niobate (TFLN) is particularly promising due to its low propagation loss, efficient parametric down conversion, fast electro-optical modulation. In this work, we demonstrate squeezed light source on an integrated TFLN...
Efficient fiber-to-chip couplers for multi-port access to photonic integrated circuits are paramount a broad class of applications, ranging, e.g., from telecommunication computing and quantum technologies. While grating-based approaches convenient out-of-plane often desirable packaging point view, on low-index platforms, such as silicon nitride or thin-film lithium niobate, the limited grating strength has thus far hindered achievement coupling efficiencies comparable ones attainable in...
Lithium Niobate On Insulator (LNOI) has recently emerged as a promising platform for the realization of electro-optically reconfigurable waveguides combining small footprint and ultra-low propagation loss. Integration these components with superconducting nanowire single photon detectors (SNSPDs) opens up possibility to perform on-chip manipulation detection quantum states light in physically stable scalable architecture. Here we report recent theoretical experimental progress towards fast...
Lithium-Niobate-On-Insulator (LNOI) has emerged as a promising platform in the field of integrated photonics. Nonlinear optical processes and fast electro-optic modulation have been reported with outstanding performance ultra-low loss waveguides. In order to harness advantages offered by LNOI technology, suitable fiber-to-chip interconnects operating at different wavelength ranges are demanded. Here we present easily manufacturable, self-imaging apodized grating couplers, featuring coupling...
The development of efficient coupling interfaces is a crucial requirement to fully harness the on-chip performance photonic integrated circuits. Optical access commonly implemented by either edge or vertical coupling, latter one often relying on diffractive grating structures. At present, couplers are preferred when broadband and operation required, while mostly employed for wafer-scale fast prototyping devices, at expenses decreased efficiency. Here we present apodized surface couplers,...
We demonstrate electro-optic modulators and superconducting nanowire single-photon detectors (SNSPDs) monolithically integrated in a single Lithium-Niobate-On-Insulator (LNOI) device, featuring ultra-low propagation loss compact footprint.
We present the experimental propagation of spin waves. Varying excitation parameters, we can create basis for implementation nano-scale magnonic networks to be used complex non-traditional data-processing schemes, including neuromorphic computing.
We develop high-speed and low-loss lithium-niobate-on-insulator circuits interface them with a quantum-dot-based deterministic single-photon source. demonstrate key functionalities required for general-purpose quantum computing, including active photon routing multimode interference [1].
Lithium-niobate-on-insulator (LNOI) is emerging as a promising platform for integrated quantum photonic technologies because of its high second-order optical nonlinearity, compact footprint, and low propagation loss in broad wavelength range. Importantly, LNOI allows creating electro-optically tunable circuits that can be efficiently operated at cryogenic temperature. Their integration with superconducting nanowire single-photon detectors (SNSPDS) paves the way realizing scalable devices...
We integrate electro-optic modulators and superconducting nanowire single-photon detectors on a single low-loss Lithium-Niobate-On-Insulator device. show photon detection at modulation frequency up to 1 GHz static reconfigurability with an optimal bias-drift-free operation.
We present the experimental realization of electro-optically reconfigurable Lithium-Niobate-On-Insulator waveguide circuits featuring propagation loss down to ~0.8 dB/cm at a ~900 nm wavelength, designed for operation with single photons emitted by InAs/GaAs Quantum Dots.
Scalable photonic quantum computing architectures pose stringent requirements on processing devices. The need for low-loss high-speed reconfigurable circuits and near-deterministic resource state generators are some of the most challenging requirements. Here we develop an integrated platform based thin-film lithium niobate interface it with deterministic solid-state single-photon sources dots in nanophotonic waveguides. generated photons processed programmable at speeds several GHz. We...