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Single photon detectors are essential for various quantum and imaging applications. Here, the authors report graphene bolometers able to detect single near-infrared photons at temperatures up to 1.2 K with intrinsic quantum efficiency up to 87%, dark count  < 1 per second and effective noise equivalent power down to 2 × 10⁻²² W/\(\sqrt{{{{\rm{Hz}}}}}\).

A monolithically integrated photonic ski-jump enables scalable, diffraction-limited 2D beam scanning from photonic chips, achieving ultrahigh spot rates, compact footprints and applications spanning displays, sensing and quantum photonics.

Operating devices close to a phase transition can improve performance due to the singular behaviour at critical points. An enhancement in sensitivity has now been achieved using the bistable transition point in a hybrid quantum system.

Optical neural network processors offering benefits in bandwidth and energy consumption but problems in scaling and parallelism. The author presenting a novel optical tensor processor capable of optically performing large-scale, high-speed matrix-matrix multiplication in a single step.

The authors demonstrate a cavity enhancement of single artificial atoms at telecommunication wavelengths in silicon by coupling them to highly optimized photonic crystal cavities, showing intensity enhancement and highly pure single-photon emission.

While desirable for compact solutions, the miniaturization of spectrometers comes at the cost of spectral resolution and operating range. Here, Wanet al. propose a tapered fibre multimode interference spectrometer exhibiting high spectral resolution from the visible to the near infrared in a compact configuration.

Optical control of atomic quantum systems poses stringent requirements on modulators. Here, the authors present a piezoelectrically actuated silicon-nitride-based high-speed spatial light modulator technology meeting those needs.

A compact platform for quantum magnetometry and thermometry can be created by integrating nitrogen–vacancy-based quantum sensing with complementary metal–oxide–semiconductor (CMOS) technology.

A large-scale, low-loss and phase-stable programmable nanophotonic processor is fabricated to explore quantum transport phenomena. The signature of environment-assisted quantum transport in discrete-time systems is observed for the first time.

The authors present DIGIT, a Bayesian imaging method that maps quantum emitters to lattice sites, achieving 0.178 Å precision and a new exponential scaling law, enabling massively parallel, sub-ångström localization in quantum and biological systems.

Precise control of color centers in silicon can enable scalable quantum photonic networks. Here, the authors demonstrate emission wavelength tuning and nanoscale vertical localization of individual quantum emitters within photonic integrated circuits via localized electromechanical strain.

A data interface that is based on complementary metal–oxide–semiconductor technology can provide wireless data transfer between cryogenic and room temperature, and minimize the heat-to-information transfer ratio.

Mid-infrared photonic integrated circuits (PICs) are important for sensing and optical communications, but their operational wavelengths are usually limited below 4 μm. Here, the authors report the realization of photothermoelectric graphene photodetectors incorporated in a chalcogenide glass-on-CaF2 PIC operating at 5.2 μm, showing promising results for gas sensing applications.

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.

Coupling to a cavity enhances the readout fidelity of NV center-based quantum sensors, though thermal noise remains a challenge. Here the authors use spin refrigeration and a nonlinear model to demonstrate a highly sensitive quantum magnetometer with NV centers strongly coupled to a microwave resonator.

Researchers experimentally demonstrate a fully integrated coherent optical neural network. The system, with six neurons and three layers, operates with a latency of 410 ps.

The authors demonstrate measurement, binning, and transfer of 119 photonic crystal cavities (PhCCs) in one session, forming spatially ordered arrays sorted by resonant wavelength. In-situ monitoring reveals, for the first time, dynamic plastic and elastic responses to the print process over timescales from seconds to hours.

High-speed programmability of spatially-structured light imparts faster control upon atomic qubits. Here, the authors demonstrate reconfigurable GHz-rate modulation on sixteen visible-wavelength channels, used here to address color centers in diamond.

By implanting ¹¹⁷Sn, a fibre-packaged nanophotonic diamond waveguide with optically addressable hyperfine transitions separated by 452 MHz is demonstrated. This enables the formation of a spin-gated optical switch and achieving a waveguide-to-fibre extraction efficiency of 57%.

Energy consumption and compute density are challenges for computing systems. Here researchers show an optical computing architecture using micrometre-scale VCSEL transmitter arrays enabling 7 fJ energy per operation and a potential compute density of 6 tera-operations mm⁻² s⁻¹.

Realising integrated photonic circuits containing isolated telecommunications-wavelength artificial atom single photon emitters is an outstanding challenge in quantum technologies. Here, the authors demonstrate how to embed optically tunable G-centers in silicon-on-insulator integrated circuits.

Nitrogen-vacancy centres in diamond have established themselves as excellent candidates for solid-state quantum memories due to their optical addressability and long coherence times. Here, the authors report on a diamond-nanocavity system with improved spin-photon interface performances.

The integration of single-photon detectors, as superconducting nanowire single-photon detectors, in photonic-integrated circuits is a goal of quantum information science. Here, Najafi et al.introduce a micrometer-scale flip-chip process enabling such a integration in a scalable way.

Interfacing spin quantum memories with photons requires the controlled creation of defect centre—nanocavity systems. Here the authors demonstrate direct, maskless creation of single silicon vacancy centres in diamond nanostructures, and report linewidths comparable to naturally occurring centres

Applications of solid-state qubits in large-scale quantum networks are limited by power and density constraints associated with microwave driving. Here the authors propose a programmable architecture based on diamond color centers driven by electric or strain fields for reduced cross-talk and power consumption.

Integrating tunable quantum emitters with commercial photonic circuits is promising for quantum information applications but remains a challenge. Here the authors report integration of InAs/InP microchiplets containing quantum dot single photon emitters into a large-scale foundry silicon platform.

A modular quantum system-on-chip architecture integrates thousands of individually addressable spin qubits in two-dimensional quantum microchiplet arrays into an integrated circuit designed for cryogenic control, supporting full connectivity for quantum memory arrays across spin–photon channels.

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.

An approach for integrating a large number of solid-state qubits on a photonic integrated circuit is used to construct a 128-channel artificial atom chip containing diamond quantum emitters.

Efficient control of thermal radiation is at the core of device design for a variety of applications. Here, the authors demonstrate a high-temperature thermal emitter with selective emission from a graphene-silicon photonic crystal nanocavity.

Inhomogeneous spectral distribution and multi-photon emission are currently hindering the use of defects in layered hBN as reliable single photon emitters. Here, the authors demonstrate strain-controlled wavelength tuning and increased single photon purity through suitable material processing.

A chip-integrated graphene photodetector with a high responsivity of over 0.1 A W⁻¹, high speed and broad spectral bandwidth is realized through enhanced absorption due to near-field coupling. Under zero-bias operation, response rates above 20 GHz and an instrumentation-limited 12 Gbit s⁻¹ optical data link are demonstrated.

A graphene–hBN heterostructure integrated onto a photonic crystal cavity shows enhanced bolometric response owing to improved light absorption and ultrafast thermal relaxation time.

Nitrogen–vacancy centres offer significant promise as nanoscale magnetometers. A light-trapping diamond waveguide is demonstrated, enhancing the temperature and magnetic field sensitivity of such centres by three orders of magnitude.

Analysis of the optical characteristics of a chip-based photonic crystal cavity embedded with a quantum dot demonstrates the occurrence of both photon tunnelling and photon blockade phenomena. Such behaviour could prove useful in the development of single-photon transistors and detectors.

One of two papers that demonstrate that a single quantum dot placed within an optical cavity can directly block incoming photons when it is strongly coupled to the cavity's optical field. InAs quantum dots placed respectively inside photonic crystal vacancies and inside GaAs microdisks, observe strong coupling directly in the optical transmission signal.

Optical interconnect components based on bilayer MoTe₂ p–n junctions can be directly integrated with silicon photonics

Employing a widefield cryogenic microscope to parallelize resonant spectroscopy, chip-scale automated optical characterization of solid-state quantum emitters is demonstrated.

Panuski et al. demonstrate a programmable photonic crystal cavity array, enabling the spatiotemporal control of a 64 resonator, two-dimensional spatial light modulator with nanosecond- and femtojoule-order switching.

Optical recurrent neural networks present a unique challenge for photonic machine learning. Here, the authors experimentally show the first optoacoustic recurrent operator based on stimulated Brillouin scattering which may unlock a new class of optical neural networks with recurrent functionality.

Here, the authors demonstrate that a secondary electron electron-beam-induced current imaging technique in a scanning transmission electron microscope can be applied to spatially resolve the atomic scale electron density in an encapsulated WSe₂ monolayer.

Fabrication errors limit the scaling of programmable photonic circuits. Here the authors show how a broad class of circuits can be made asymptotically fault-tolerant, where the effect of errors remains controlled regardless of the circuit’s size.

Twisted light in the form of orbital angular momentum (OAM) can provide an additional spatial dimension for information transmission. Here, the authors demonstrate a prescription for OAM generation using photonic crystal ring resonators, in which high cavity quality factors (up to 10⁶) are retained.