Controlling angular dispersions in optical metasurfaces

The uncontrolled angular responses of metasurfaces have significantly hampered their practical applications. Here, scientists in China revealed the physical origins of angular dispersions in metasurfaces and established a general strategy to guide designing optical metasurfaces with fully controlled angular dispersions. This finding establishes a new platform for achieving angle-multiplexed functional meta-devices, significantly expanding the wave-manipulation capabilities of optical metasurfaces.