Search

Quantum fluids such as cavity-polaritons show nonlinear optical properties of interest in applications such as quantum optics. Here, Sturm and colleagues demonstrate an optical control of the phase of a polariton flow, and make use of this to realize a compact exciton–polariton interferometer.

Atom interferometers exploit wave-particle duality and can be used as sensitive measurement devices. Berrada et al.present a Mach–Zehnder interferometer for Bose–Einstein condensates trapped on an atom chip and demonstrate enhanced performance using non-classical states.

The authors demonstrate a 70 GHz modulator in a 10-μm-long two-dimensionally localized gap-plasmon waveguide system.

The authors present an integrated acousto-optic modulator fabricated in a wafer-scale process that realizes efficient, high-speed modulation of visible light with high optical power handling.

It has been proposed that phonons propagating through a material can be used for quantum computing, in a similar manner to photons. Now, several of the quantum gates and measurements needed for this approach have been demonstrated.

A manufacturable platform for quantum computing with photons is introduced and a set of monolithically integrated silicon-photonics-based modules is benchmarked, demonstrating dual-rail photonic qubits with performance close to thresholds required for operation.

The ability to imprint phase shifts on light lie at the basis of several classical and quantum light-based information processing primitives. Here, the authors demonstrate the phase shift of an optical field by a single quantum emitter in a waveguide, at the single photon level.

NASA’s Cold Atom Lab has operated on the International Space Station since 2018 to study quantum gases and mature quantum technologies in Earth’s orbit. Here, Williams et al., report on a series of pathfinding experiments exploring the first quantum sensor using atom interferometry in space.

MEMS-based photonic integrated circuits (PICs) are often limited in speed by mechanical resonances. Here the authors report a programmable architecture for PICs which uses mechanical eigenmodes for synchronized, resonantly enhanced optical modulation.

The authors showcase a photonic tensor core in TFLN platform that achieves a computational speed of 120 GOPS for neural networks, with capabilities of in-situ training that support exciting prospects of negative number multiplication. The tensor core can efficiently process 112  × 112-pixel images, potentially scaling up AI tasks and offering nanosecond latency without needing a digital processor.

Researchers demonstrate quantum teleportation of six general states using an entangled-light-emitting diode consisting of an InAs quantum dot. The emission wavelength of quantum dots is readily tunable using electric fields. The average teleportation fidelity of 0.704±0.016 exceeds the limit possible with classical light, proving the quantum nature of the teleportation.

We develop an optical method that can set and read the state of electrons in the valley polarization of bulk transition metal dichalcogenide semiconductors, with potential utility as digital storage at quantum coherent timescales and application in quantum computing.

Researchers present a scalable hybrid photonic processor that uses mode- and wavelength-division multiplexing to overcome electronic limits, demonstrating ultralow latency and real-time signal processing for next-generation communication networks.

Integrated optical circuits today are typically designed for a few special functionalities and require complex design and development procedures. Here, the authors demonstrate a reconfigurable but simple silicon waveguide mesh with different functionalities.

The strong electro-optic interaction, low optical loss and high microwave bandwidth of thin-film lithium niobate have enabled applications from computing to quantum information. This Review explores the fundamental principles, recent advances and the future potential of integrated lithium niobate technologies.

An architecture inspired by Hopfield networks based on a programmable, stable, room-temperature optoelectronic oscillator-based photonics Ising machine is introduced that can be used to efficiently address optimization and combinatorics problems.

Increasing the conversion efficiency of soliton crystals will enable further application of optical frequency comb. Here the authors engineer an hybrid Mach-Zehnder micro-ring resonator to achieve 80% pump-to-comb conversion efficiency based on dissipative Kerr solitons.

The authors demonstrate dual-probe multi-messenger imaging of high-energy-density plasmas based on laser-wakefield-accelerated electrons. This enables spatiotemporally resolved simultaneous probing of plasma hydrodynamics and electromagnetic field evolution with both x-ray and electron beams.

The breaking of parity-time symmetric gain and loss profiles can be used to achieve single-mode lasing in coupled microring resonators. Here, Liuet al. show that this effect can be electrically controlled with a tunable lasing wavelength and strong sidemode suppression.

Continuum generation in optical fibres has enabled many applications, like optical frequency combs. Here, Ohet al. demonstrate controlled dispersive-wave generation in on-chip silica waveguides, which could have a similar impact on integrated devices.

A 10 Gb s^–1 phase modulator based on a graphene-on-silicon Mach–Zehnder interferometer (MZI) is reported. The compact device has a phase-shifter length of only 300 μm and provides modulation of light at 1,550 nm with a 35 dB extinction ratio.

Non-equilibrium Bose-Einstein condensates exist in different systems like polaritons, photons. Here the authors demonstrate photonic BECs in an excited or a non-equilibrium state and explore the flow of the photons coupled to the interferometer in order to minimize the loss.

Researchers demonstrated integrated non-magnetic isolators with 24.5-dB contrast, –2.16-dB insertion loss and 2-THz (16-nm) optical bandwidth.

A three-photon entangled Greenberger–Horne–Zeilinger state is directly produced by cascading two entangled down-conversion processes. Experimentally, 11.1 triplets per minute are detected on average. The three-photon entangled state is used for state tomography and as a test of local realism by violating the Mermin and Svetlichny inequalities.

Previous interference experiments on indirect excitons found dislocation-like phase singularities that could not be explained by common phase defects. Here, the authors explain these features in terms of the moiré pattern of interference of condensate matter waves propagating over macroscopic distances.

In quantum random number generation, one has generally to choose between high speed and strong security. Here, the authors show how to bound several adversarial imperfections on state preparation and measurement, generating 8192 secure random bits every 0.12 s in real time using a simple apparatus.

Phase change materials (PCMs) are promising for low-power programmable photonic circuits. Here, authors show electrically controlled wide-bandgap PCM antimony sulfide achieving low loss, high cyclability and up to 32 levels, and post-fabrication trimming is also demonstrated.

Germano-silicate used as a building material for integrated photonics circuits substantially reduces optical losses, approaching levels comparable to those in optical fibres.

Neuromorphic computing processes data faster and with less energy than electronics. Here, authors demonstrate a reconfigurable photonic reservoir computer that performs multiple machine learning tasks in parallel at ultrafast rates while using extremely low energy per operation.

Optical neural networks offer efficient AI computation but face precision limitations. Here, authors demonstrate a digital-analog hybrid matrix multiplication processor achieving 16-bit numerical precision and offering a potential solution to practical optical neural networks.

A turn-key-operable hybrid integrated Pockels laser based on an external distributed Bragg waveguide grating reflector fabricated in a wafer-scale thin-film lithium niobate on insulator platform is demonstrated, with a tuning efficiency of over 550 MHz V^–1, tuning rates reaching the exahertz per second, and a high output power of 15 mW.

Recent advances in the identification and growth of antiferromagnetic topological insulators open the way to the manipulation of the chiral edge states that are topologically required at their step edges and domain walls. Here, the authors propose a quantum point junction formed by two types of edge states and discuss its applications in electron quantum optics.

A four-port programmable interferometer based on aluminium nitride piezo-optomechanical actuators coupled to silicon nitride waveguides is reported. Its low-power mechanism, which can be fabricated in a complementary metal–oxide–semiconductor foundry, facilitates operation at cryogenic temperatures.

Microwave photonic technologies are poised to revolutionise electronic systems. Here the authors integrate necessary but until now elusive, MHz-level resolution photonic processing with on-chip electro-optic components in a compact microwave photonic notch filter.

This work demonstrates the necessary building blocks to realize large-scale multiplexed quantum networking nodes in a visible thin-film lithium niobate integrated photonics platform.

The study of the relationship between particle speed and negative kinetic energy, arising in regions in which, according to classical mechanics, particles are not allowed to enter, reveals behaviour that appears to contradict the predictions of Bohmian mechanics.

In this work the authors demonstrate on-chip integration of Brillouin lasing operating at visible wavelengths, with engineered design for stable output. This technical and scientific advance will help develop integrated light sources for quantum computing or atomic and molecular spectroscopy.

Integrated optical frequency combs are powerful tools for optical spectroscopy. Here, authors demonstrate low-power, detectable-rate soliton microcombs from telecom to visible bands, including wavelength-multiplexed operation, using ultra-low-loss silicon nitride waveguides.

An experimental demonstration of the concept of a ‘quantum access network’ based on simple and cost-effective telecommunication technologies yields a viable method for realizing multi-user quantum key distribution networks with efficient use of resources.

Switching-current-based low-power transmitters with a high throughput can be created using an approach in which silicon-photonics-based Mach–Zehnder modulators and complementary metal–oxide–semiconductor electrical drivers are co-designed.