Detecting Spatially Incoherent Light with Plasmonic Metasurfaces

• DOI: 10.1364/fio.2020.fm2c.6
• Publication Date: 2021-01-12T20:40:53Z
• Authors: Thomas Frank; Oleksandr Buchnev; Tamsin Cookson; Malgosia Kaczmarek; Pavlos Lagoudakis; Vassili A. Fedotov
• Keywords: Spatial coherence; Biophotonics

We report on a discovery that homogeneous plasmonic non-diffracting metasurfaces of certain type respond differently to spatially coherent and incoherent light, enabling robust speckle-free discrimination between different degrees coherence. The effect has no direct analogue in natural optical materials may find applications compact metadevices enhancing imaging, vision, detection, communication metrology.