Harvard engineers have built a chip-scale, twisted bilayer photonic crystal whose twist angle and spacing can be dynamically adjusted with a MEMS actuator to tune the chirality of light.

A new class of photonic devices enables the precise broadcasting of light from the chip into free space in a scalable way, which could lead to advanced displays, high-speed optical communications, and larger-scale quantum computers.

A research paper by scientists from East China University of Science and Technology, University of Applied Sciences Campus Vienna, and other institutions proposed a domain generalization model (DGIFE) for electroencephalography (EEG) signals, featuring structured feature decoupling and fine-grained data augmentation to address the domain bias challenge in cross-subject brain-computer interface (BCI) applications.

The new research paper, published on Feb. 24 in the journal Cyborg and Bionic Systems, presented the development, validation, and optimization of the DGIFE model, demonstrating its superior generalization performance and noise robustness across multiple public datasets, providing an effective solution for practical BCI deployment.

A Harvard study shows that snakes “stand” by focusing bending and muscle activity in a small region near their base.