Hooper, H. Penketh and colleagues describe a method for achieving low-loss spatial phase modulation of millimetre waves through optically tunable coupling. This creates a route to modulate the wave’s spatial phase while reducing the losses that typically accompany active control at high frequencies. Subject of Research: Optically tunable, low-loss spatial phase modulation of millimetre wavesArticle Title: Low-loss spatial phase modulation of mm-waves via optically-tunable couplingArticle References: White, G.N., Hooper, I.R., Penketh, H. et al. “Low-loss spatial phase modulation of mm-waves via optically-tunable coupling.” https://doi.org/10.1038/s44172-026-00734-0Image Credits: AI GeneratedDOI: 10.1038/s44172-026-00734-0Keywords: Millimetre waves, spatial phase modulation, optically tunable coupling, low-loss wave control, beam steering, photonics, electromagnetic wave engineering