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An all-optical method involving third-harmonic Faraday rotation is used to probe the breaking of time-reversal symmetry in mono- and bilayer transition metal dichalcogenide WS2.
The researchers demonstrate parallel optical matrix–matrix multiplication, which enables fully parallel tensor processing through a single coherent light propagation. The approach provides a scalable, high-efficiency foundation for advancing next-generation optical computing.
Researchers demonstrate phase-stable sub-cycle self-compressed light transients, as well as their sampling down to half of an optical cycle, and determine their waveform phase offset. They apply the transients to soft X-ray high-harmonic generation and attosecond X-ray absorption spectroscopy.
Observation and control of spin-forbidden dark excitons is demonstrated in a hybrid heterostructure of WSe2 monolayers and plasmonic nanocavities.
A resource-efficient characterization method to completely characterize multimode second-order nonlinear optical quantum processes is demonstrated, satisfying the required physical condition. Scaling quadratically with the mode number, it enables complete 16-mode analysis.
Red, green and blue organic field-effect light-emitting transistors in which charge-carrier transport and light emission are spatially separated to improve exciton management and device efficiency are reported.
A uni-travelling-carrier photodiode with 206-GHz bandwidth, bandwidth–efficiency product surpassing 130 GHz and external responsivity of 0.81 A W−1 is demonstrated. Radio-frequency power exceeding –5 dBm and single-line 120-Gbps wireless transmission across 54 m were achieved, without low-noise amplifiers.
A room-temperature double-layer WS2 microcavity is used to explore spin anisotropy and tune it with interlayer spacing.
Engineering the perovskite–electrical contact interface with sodium heptafluorobutyrate reduces interfacial defects and improves charge transport in perovskite solar cells. Functionalized devices deliver a certified power conversion efficiency of 26.96%, which is fully retained after 1,200 h of continuous operation under 1-sun illumination.
A plasma lens capable of focusing broadband extreme-ultraviolet attosecond pulses is demonstrated.
The quantum fusion of two independent 10-user networks is demonstrated based on multi-user entanglement swapping. Active temporal and wavelength multiplexing schemes are developed to merge the two networks into a larger network with 18 users in the quantum correlation layer.
John ‘JJ’ Joannopoulos, a pioneering condensed-matter theorist who contributed to the launch of modern nanophotonics and mentored a plethora of scientists and engineers, passed away on 17 August 2025, aged 78. In his five decades at MIT, JJ combined first-principles insights with a gift for nurturing people, shaping fields from ab initio materials theory to photonic crystals and their applications.
A hollow-core optical fibre which surpasses silica fibre’s long-standing limits and provides an attenuation below 0.1 dB/km across a record-wide bandwidth, could yield more energy-efficient communications with lower latency and higher data capacity.
Characterizing and reporting photodetector performance demands common standards to ensure rigorous, reproducible and comparable practices.
A vapour post-treatment strategy enables fully printed carbon-electrode perovskite solar modules with an area of about 50 cm2 and a certified power conversion efficiency of 19.26%. The modules show no performance decay after 1,000 h of continuous operation at 65 °C.
The quantum noise of Kerr combs is found to exhibit oscillatory lattice dynamics through state transitions, with implications for squeezing and comb formation.
Integrating a thin-film resistance thermometer above a high-Q SiN microresonator enables local temperature monitoring and active stabilization of its resonance wavelength. The emission wavelength of a distributed feedback laser locked to the microresonator fluctuates within 0.5 pm over a period of 50 h.
This Consensus Statement discusses common misunderstandings about photodetector performance characterization and reporting, and offers recommendations for standardized practices.
Nanostencil etching and lithography enable the fabrication of green-emitting nanoscale organic light-emitting diode pixels with size as small as 100 nm, densities as high as 100,000 pixels per inch and average external quantum efficiency of 13.1% for green emission.