Transverse optical torque observed at the nanoscale
Yoshito Y. Tanaka
Nature Physics, Published online: 20 April 2026; doi:10.1038/s41567-026-03268-6 Optical forces and torques on nanoparticles are difficult to measure due to the diffraction limit of light. Now, transverse optical torque is observed through the optical trapping and spatial tracking of a designed microscale structure.