Phase-change nonlocal metasurfaces for dynamic wave-front manipulation

• DOI: 10.1103/physrevapplied.21.044004
• Publication Date: 2024-04-01T16:08:28Z
• Authors: Tingting Liu; Dandan Zhang; Wenxing Liu; Tianbao Yu; Feng Wu; Shuyuan Xiao; Lujun Huang; Andrey E. Miroshn...
• Keywords: FOS: Physical sciences; Physics - Applied Physics; Applied Physics (physics.app-ph); Physics - Optics; Optics (physics.optics)

Recent advances in nonlocal metasurfaces have enabled unprecedented success shaping the wave front of light with spectral selectivity, offering alternative solutions for many emerging nanophotonics applications. The ability to tune both and spatial properties such a class is highly desirable, but dynamic nonvolatile control remains elusive. Here, we demonstrate active narrowband wave-front manipulation by harnessing quasi-bound states continuum (quasi-BICs) phase-change metasurfaces. proof-of-principle made ${\mathrm{Sb}}_{2}{\mathrm{S}}_{3}$ allow nonvolatile, reversible, tunable over switchable response at given wavelength near-infrared regime. design principle mainly builds upon combination geometry phase quasi-BICs tunability meta-atoms tailor resonant wavelengths. By tuning crystallization level through controlling external stimuli, wave-front-shaping functionalities beam steering, one-dimensional, two-dimensional focusing, holographic imaging are achieved exclusively wavelengths, functionally transparent off resonance. This work represents critical advance towards developing an integrated metasurface future augmented virtual reality wearables.