A5030639479- Photonic and Optical Devices
- Neural Networks and Reservoir Computing
- Parallel Computing and Optimization Techniques
- Quantum Information and Cryptography
- Advanced Fiber Laser Technologies
- Optical Network Technologies
- Advanced Data Storage Technologies
- Semiconductor Lasers and Optical Devices
- Laser Material Processing Techniques
- Mechanical and Optical Resonators
- Software System Performance and Reliability
- Quantum Mechanics and Applications
- Distributed systems and fault tolerance
- Software Testing and Debugging Techniques
- Cloud Computing and Resource Management
- Network Security and Intrusion Detection
- Advanced Malware Detection Techniques
- Advanced Photonic Communication Systems
- Quantum optics and atomic interactions
- Chaos-based Image/Signal Encryption
- Quantum Computing Algorithms and Architecture
- Logic, programming, and type systems
- Laser-Matter Interactions and Applications
- Advanced Optical Sensing Technologies
- Network Packet Processing and Optimization
Istituto di Fotonica e Nanotecnologie
2018-2025
Paderborn University
2025
National Research Council
2018-2024
Politecnico di Milano
2018-2023
Center for Biomolecular Nanotechnologies
2023
Consorzio Roma Ricerche
2020
Nvidia (United States)
2018-2019
University of Utah
2009-2019
University of Warwick
2018
IBM (United States)
2018
With Android being the most widespread mobile platform, protecting it against malicious applications is essential. users typically install from large remote repositories, which provides ample opportunities for newcomers. In this paper, we evaluate a few techniques detecting on repository level. The perform automatic classification based tracking system calls while are executed in sandbox environment. We implemented maline tool, and performed extensive empirical evaluation suite of around...
Photon entanglement is at the basis of many protocols in photonic quantum technologies, from computing to simulation and sensing.The generation entangled photons integrated waveguides particularly advantageous due enhanced stability more efficient nonlinear interaction.Here we realize an source wavelength-degenerate based on hybrid interfacing circuits different materials, all inscribed by femtosecond laser pulses.We show that our source, spontaneous parametric down-conversion telecom...
Quantum key distribution (QKD) is nowadays a well-established method for generating secret keys at distance in an information-theoretically secure way, as the secrecy of QKD relies on laws quantum physics and not computational complexity. In order to industrialize QKD, low-cost, mass-manufactured, practical setups are required. Hence, photonic electronic integration sender’s receiver’s respective components currently spotlight. Here we present high-speed (2.5 GHz) integrated setup featuring...
Abstract Modern quantum technologies have matured such that they can now be used in space applications, e.g., long‐distance communication. Here, the design of a compact true single photon source is presented enhance secure data rates satellite‐based key distribution scenarios compared to conventional laser‐based light sources. The fluorescent color center hexagonal boron nitride. emitter off‐resonantly excited by diode laser and directly coupled an integrated photonic processor routes...
We study analytically the polarization behaviour of directional couplers composed birefringent waveguides, showing that they can induce transformations depend on specific input-output path considered.On basis this study, we propose and demonstrate experimentally, by femtosecond laser writing, are free from problem also yield a independent power-splitting ratio.More in detail, devise two different approaches to realize such devices: first one is based local birefringence engineering, while...
OpenMP plays a growing role as portable programming model to harness on-node parallelism, yet, existing data race checkers for have high overheads and generate many false positives. In this paper, we propose the first checker, ARCHER, that achieves accuracy, low on large applications, portability. ARCHER incorporates scalable happens-before tracking, exploits structured parallelism via combined static dynamic analysis, modularly interfaces with runtimes. significantly outperforms TSan Intel®...
Abstract Femtosecond laser writing is a powerful technique that allows rapid and cost‐effective fabrication of photonic integrated circuits with unique 3D geometries. In particular, the possibility to reconfigure such devices by thermo‐optic phase shifters represents paramount feature, exploited produce adaptive programmable circuits. However, scalability strongly limited flaws current thermal shifters, which require hundreds milliwatts operate exhibit large crosstalk. this work,...
Photonic integrated circuits (PICs) are today acknowledged as an effective solution to fulfill the demanding requirements of many practical applications in both classical and quantum optics. Phase shifters photonic circuit offer possibility dynamically reconfigure its properties order fine tune operation or produce adaptive circuits, thus greatly extending quality applicability these devices. In this paper, we provide a thorough discussion main problems that one can encounter when using...
The detection and elimination of data races in largescale OpenMP programs is critical importance. Unfortunately, today's state-of-the-art race checkers suffer from high memory overheads and/or miss races. In this paper, we present SWORD, a detector that significantly improves upon these limitations. SWORD limits the application slowdown usage by utilizing only bounded, user-adjustable buffer to collect targeted accesses. When fills up, accesses are compressed flushed file system for later...
To date, most integrated quantum photonics experiments rely on single-photon detectors operating at cryogenic temperatures coupled to photonic circuits (PICs) through single-mode optical fibers. This approach presents significant challenges due the detection complexity, as conditions hinder development of scalable systems. In addition, going towards fully-integrated devices or, least, removing fibers would be also advantageous develop compact and cost-efficient solutions featuring a high...
Programmability in femtosecond-laser-written integrated circuits is commonly achieved with the implementation of thermal phase shifters. Recent work has shown how such shifters display significantly reduced power dissipation and crosstalk isolation structures. However, aforementioned shifter technology based on a single gold film, which poses severe limitations integration density circuit complexity due to intrinsic geometrical constraints. To increase compactness, we propose two...
Graphics Processing Units (GPUs) have been widely adopted to accelerate the execution of High Performance Computing (HPC) workloads due their enormous computational throughput, ability execute a large number threads inside SIMD groups in parallel, and use multithreaded hardware hide long pipelining memory access latency. However, developing applications able exploit high performance GPUs requires proper code tuning. As consequence, computer scientists proposed different approaches simplify...
Neither static nor dynamic data race detection methods, by themselves, have proven to be sufficient for large HPC applications, as they often result in high runtime overheads and/or low race-checking accuracy. While combined and approaches can fare better, creating such combinations, practice, requires attention many details. Specifically, existing state-of-the-art detectors are aimed at low-level threading models, cannot handle high-level models OpenMP. Further, do not provide mechanisms...
Modern quantum technologies have matured such that they can now be used in space applications, e.g., long-distance communication. Here, we present the design of a compact true single photon source enhance secure data rates satellite-based key distribution scenarios compared to conventional laser-based light sources. Our is fluorescent color center hexagonal boron nitride. The emitter off-resonantly excited by diode laser and directly coupled an integrated photonic processor routes photons...
Universal photonic processors (UPPs) are reconfigurable integrated circuits able to implement arbitrary unitary transformations on an input state. Femtosecond laser writing (FLW) allows for rapid and cost-effective fabrication of with low propagation losses. A FLW process featuring thermal isolation a dramatic reduction in dissipated power crosstalk thermally-reconfigurable Mach-Zehnder interferometers (MZIs), especially when operated vacuum, 0.9 mW dissipation full reconfiguration 0.5% at...
Despite the popularity and growing importance of OpenMP, a formal characterization its concurrency is lacking. In this paper, we provide such through an operational semantics. Semantic descriptions languages are written to serve specific end goals, hence abstractions fully detailed implementations. We have developed our semantics help with construction novel OpenMP data race checker called Sword that collects execution traces efficiently, subjects offline analysis: used in latter phase. Key...
With the increasing emphasis on exploiting concurrency efficiently and correctly, lack of suitable pedagogical material for teaching is a growing problem. In this paper, we summarize recently concluded class as well some independent projects in area multi-core computing that offer insights to address We examine background papers, low level concurrency, threading message passing. The use dynamic formal verification tools setting discussed detail. conclude with summary being assembled,...
Large scientific simulations must be able to achieve the full-system potential of supercomputers. When they tap into high-performance features, however, a phenomenon known as non-determinism may introduced in their program execution, which significantly hampers application development. Pruners is new toolset detect and remedy non-deterministic bugs errors large parallel applications. To show capabilities for development, we also demonstrate early usage on real-world production
Thermo-optic phase shifters allow one to dynamically tune and control the operation of integrated-optics interferometers. They have been demonstrated nowadays in different waveguide platforms, their reliable functioning has enabled realization reconfigurable circuits notable complexity. The design approach such devices is often based on finite-element numerical simulations, which provide accurate descriptions underlying thermal phenomena, at price long computational times. Here, contrary, we...
Quantum key distribution (QKD) is nowadays a well established method for generating secret keys at distance in an information-theoretic secure way, as the secrecy of QKD relies on laws quantum physics and not computational complexity. In order to industrialize QKD, low-cost, mass-manufactured practical setups are required. Hence, photonic electronic integration sender's receiver's respective components currently spotlight. Here we present high-speed (2.5 GHz) integrated setup featuring...
Femtosecond laser micromachining (FLM) is a powerful technique that allows for rapid and cost-effective fabrication of photonic integrated circuits (PICs), even when complex 3D waveguide geometry required. Among the features these devices, it worth mentioning possibility to dynamically reconfigure circuit by thermal phase shifting. However, an microheater dissipates more than 500 mW induce 2π shift in FLM devices operating at telecom wavelength (i.e. 1550 nm) induces significant crosstalk...
Femtosecond laser writing (FLW) can open new perspectives on universal photonic processors (UPPs). We propose here two building blocks for the realization of FLW-UPPs and we show preliminary results obtained a 6-mode device.
Femtosecond laser micromachining allows rapid and cost-effective fabrication of thermally-reconfigurable photonic integrated circuits with unique 3D geometries. In article number 2000024, Francesco Ceccarelli co-workers exploit thermally-insulating microstructures to decrease the power needed induce a 2π phase shift down 37 mW reduce thermal crosstalk few percent for an inter-waveguide separation 80 μm.