Power-efficient silicon nitride soliton microcombs

Microcombs are strong contenders for attaining the frequency stability and performance of standard passively modelocked lasers on a chip scale. Understanding the optical phase noise dynamics in soliton microcombs and enhancing the power efficiency are crucial directions for the development of ultra-low timing jitter pulsed sources on-chip with enhanced repetition rate stability and ultra-low optical linewidth.

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Integrated devices and high-dimensional photonic systems for quantum technologies

Quantum technologies promise a change of paradigm for many fields of application, for example in communication systems, in high-performance computing and simulation of quantum systems, as well as in sensor technology. However, the experimental realization of suitable system still poses considerable challenges. Current efforts in photonic quantum target the implementation of practical and scalable systems, where the realization of controlled quantum network structures is key for many applications.

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Multilevel reconfigurable nanophotonics with low-loss phase-change materials

Phase change materials (PCMs) are currently revolutionizing nanophotonics by providing ways to tune and reconfigure optical functionalities without any moving parts. Building on this phenomenon, the last decade has witnessed many exciting reports of novel devices exploiting PCMs such as for example beam-steering, tunable light emission, reflection and absorption, programmable metasurfaces and reconfigurable neural networks.

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Integration Technologies for High-Speed Neuromorphic Photonics

The impact of the photonic integration platform of choice on the performance of a novel hybrid optoelectronic neuron based on time division multiplexing that we recently proposed is analyzed and discussed. An invited speaker presentation by Giampiero Contestabile, Associate Professor at Sant’Anna School of Advanced Studies.

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MEMS-based integrated photonic elements for ultra-low-power programmability

Programmability and reconfigurability provide exciting opportunities for integrated optics. In particular, the use of microelectromechanical tunable elements in silicon-based integrated photonics offers interesting options for scalable programmable photonics. In this invited talk, we will discuss our recent progress in developing compact, low-power, reconfigurable MEMS-based building blocks, namely tunable directional couplers and phase shifters, for a number of applications in photonic signal processing, computing, and communication.

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Programmable Integrated Photonics with Phase-Change Materials

Phase-change materials (PCMs) have emerged as a promising platform to modulate light in a nonvolatile manner—a reversible switching between their stable amorphous and crystalline states leads to an impressive refractive index contrast (∆n, ∆k ~1−3). The last decade has seen a growing interest in such a combination of properties for a variety of nonvolatile programmable devices, such as metasurfaces, tunable filters, phase/amplitude modulators, color pixels, thermal camouflage, photonic memories/computing, plasmonics, etc.

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Quantum Key Distribution with Integrated Photonics

Quantum computing’s rapid advancement threatens current cryptography, which relies on complex problems solvable by quantum computers. This necessitates the development of “quantum-safe” technologies for future network protection. Today’s data is also at risk from “harvest now, decrypt later” attacks, where encrypted messages are stored for decryption once quantum processors are available. This is especially concerning for long-term valuable information like financial records and medical data.

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Integrated and nonlinear photonics in thin film lithium niobate

An invited speaker presentation by Professor Katia Gallo, head of the Nonlinear and Quantum Photonics group at KTH – Royal Institute of Technology. Her activity spans theory, technology and experiments in nonlinear photonic crystals and integrated devices. She also leads the Quantum Communication program of the Wallenberg Centre for Quantum Technology and the National Quantum Communication Infrastructure in Sweden.

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