As electronic devices become increasingly connected, hardware authentication must move beyond stored digital secrets that can be copied or emulated. Researchers developed a graphene-based optical physical unclonable function that uses different combinations of red, green, and blue light as programmable challenges. A transformer-based model converts the resulting diffraction patterns into compact binary response units, demonstrating a route toward spectrally programmable optical authentication for future hardware security in connected devices and edge systems.

Researchers have developed a chip-scale platform for ultrawide-angle, two-dimensional optical beam steering. The system integrates a silicon photonic integrated circuit, freeform micro-optical reflectors, and a metasurface to transform guided light into high-quality free-space beams and direct them across a measured 161° field-of-view while maintaining nearly diffraction-limited beam quality. This compact, scalable architecture offers a pathway toward inter-satellite optical links, airborne LiDAR, point-to-point optical wireless communications, and other applications requiring agile, wide-angle beam control.

As Africa prepares for the arrival of a powerful El Niño weather event, an international team of researchers has found that access to improved forecasts alone will not protect many of the region’s poorest livestock farmers from the impacts of climate change.

Announcing a new publication from Opto-Electronic Sciences; DOI   10.29026/oes.2026.260019.

Announcing a new publication from Opto-Electronic Sciences; DOI   10.29026/oes.2026.260021