Varifocal Alvarez metalens array for adaptive light-field imaging (opens in new tab)

Metalens arrays hold great promise for compact light-field imaging systems owing to their compactness and wavefront shaping capabilities. However, their fixed focal lengths fundamentally limit depth-of-field modulation and axial scanning, restricting their adaptability to diverse light-field imaging scenarios. Here, we demonstrate adaptive light-field imaging using a varifocal Alvarez metalens array. The array is composed of two closely bonded metasurfaces, each patterned with 24 × 20 cubic-p...