A University of Tokyo team developed a logarithmic ultrafast photography method that uses 11 frames in a single shot to capture dynamics spanning roughly 100 femtoseconds to 10 nanoseconds, across five orders of magnitude. The method introduces band-resolved independent delay generation (BRIDGE) into STAMP, independently adjusting the timing of each band and arranging frames densely at early times and sparsely at later times. The study, published in Optica, shows early changes, subsequent shock waves and material ejection in glass and hydroxyapatite after irradiation by ultrashort laser pulses.
Why we recommend it: Allocating a limited number of frames with dense early and sparse late time intervals links early changes with subsequent shock waves and material ejection within a single hard-to-repeat event.
An international research team used extreme ultraviolet (XUV) pulses to control the interference of two stimulated Raman pathways by adjusting the optical field phase, altering the excitation yield of the helium He(2s) bound state. The experiment was carried out at the FERMI free-electron laser facility in Italy, and the results were published in Nature Photonics. The team believes the concept could eventually be used in element-specific imaging and spectroscopy tools to track electron motion and chemical transformations.
Why we recommend it: Varying the phase of the extreme ultraviolet field changes the interference of two stimulated Raman pathways, showing a route for extending coherent control methods from visible and infrared light to higher-energy spectral regions.
The Korea Research Institute of Standards and Science (KRISS) has used a photonic grating chip to remeasure the absolute frequency of the 461 nm optical transition in strontium, reducing the measurement uncertainty to about 5 MHz. This improves on the old 1938 value by more than 50 times, and the results were published in Metrologia.
Kartik Prabhu and Gopal Dixit of IIT Bombay propose using graphene as a sensor to detect quantum fluctuations of light: when graphene is illuminated by squeezed quantum light with two counter-rotating circular polarizations at a 2:1 frequency ratio, normally forbidden high-harmonic signals at integer multiples of three times the fundamental frequency are activated.
A team led by researchers Hao Wei and Xie Meilin at the Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences, has proposed a resilient neural network-assisted model reference adaptive sliding mode control strategy to address deceptive attacks, actuator gain faults and coupled parametric uncertainties in multi-device systems. The results were published in IEEE Transactions on Industrial Electronics.
A research team at KTH Royal Institute of Technology has demonstrated a programmable photonic chip that can emulate dissipative systems and detect and measure their topological properties. The work uses a mathematical method to simulate loss without actually losing the signal, then compares the light with a reference beam to distinguish topological scenarios from ordinary ones and detect exceptional points. The results were published in Physical Review Letters, and the same chip can be reprogrammed to test different scenarios.
Why we recommend it: The study reads out topological information in dissipative systems through reference-beam interference and tests different scenarios on the same programmable chip, providing a method for investigating robust properties under loss conditions.
Researchers have developed and demonstrated a GaP-on-diamond hybrid nanophotonic platform enabling controlled interaction between photons and silicon-vacancy (SiV) centers in diamond. Using stamp transfer, the team fabricated more than 600 nanophotonic cavities on a diamond substrate with a yield of 99.5%, achieving cooperativity above 1 and a spin relaxation time exceeding 0.4 milliseconds, enabling single-shot readout of SiV electron spins. Next steps include connecting multiple devices on the same chip and demonstrating entanglement.
Why we recommend it: A transfer process that avoids etching the diamond balances device yield with spin-photon coupling, offering a concrete example of how quantum network interfaces could move toward scalable manufacturing.
Researchers have observed strong coupling between light waves and traveling acoustic waves in optical fiber for the first time, opening a new platform for optoacoustic signal processing.
Researchers have developed and tested a new infrared light locking method that could support mirror coating schemes for gravitational-wave detector upgrades.
Researchers used European XFEL to generate extremely short attosecond hard X-ray pulses with record intensity, enabling studies of electrons in atoms and molecules.
A review article in Light: Science & Applications describes sliding metasurfaces developed by H. Shi, W. Zhu, G. Hu and colleagues. Relative lateral displacement of two complementary metasurface layers generates an effective phase gradient, enabling passive beam steering while retaining frequency-selective filtering. The authors argue that this geometry-driven passive approach is simpler and more scalable than tunable metasurfaces that depend on active components, and could extend to terahertz and optical bands.
Why we recommend it: The article contrasts tunable metasurfaces that rely on active components such as PIN diodes, explaining the idea of replacing per-unit cell control with interlayer translation.
Researchers used laser pulses to align tiny electrical regions, or domains, in a quantum material, demonstrating light's ability to tune a material's electrical order. The work was reported by Phys.org on October 15, 2026.
Researchers integrated gallium phosphide (GaP) nanophotonic cavities onto a diamond substrate using a stamp transfer process, enhancing quantum optical interaction with diamond color centers. The devices are first fabricated by electron-beam lithography in a GaP thin film on a carrier, screened by spectroscopic testing, and then transferred. Experiments achieved cooperativity above 1. The platform can serve as a light-matter interface in quantum networks.
Why we recommend it: The source details the heterogeneous integration process and the screening-and-transfer workflow, offering useful reference for fabrication routes for diamond color center quantum photonic devices.
Researchers propose using dynamic scattering to control speckle noise and aberrations in optical coherence tomography (OCT). Speckle arises from spatially coherent light; removing coherence eliminates speckle but also sacrifices the interferometric imaging capability that OCT relies on. The method strikes a balance between the two to improve detail in high-resolution imaging.
Optics & Photonics News reports that an early clinical study showed optogenetic therapy can partially restore vision in patients with severe vision loss. Most adverse events were mild to moderate, with only one transient severe event after injection that resolved within minutes. First author Jose-Alain Sahel of the University of Pittsburgh said the results show that the visual system retains the ability to process new information even in people with severe blindness.
Why we recommend it: Optogenetic therapy applies light stimulation directly to visual restoration, and the source article provides early clinical safety results that can serve as a reference for biophotonics applications
