Metaobjective lens can change its focal length by the push of a button.

Enhanced off-axis focusing allows a wide range of optical tasks spanning from optical tweezers to imaging.

New technology could offer a double safeguard to guard against counterfeiting.

Physicists from Austria and Israel developed a perfect absorber for arbitrary wavefronts.

Multi-entanglement could be useful for sophisticated information processing schemes.

Mirror-based device only reflects desired light.

Variable focus length lays groundwork for more comfortable, realistic AR/VR experiences.

A tunable electro-optic modulator for free space applications can modulate light at gigahertz speed.