Continuous Varifocal Metalens Based on Phase-Change Material
Continuous Varifocal Metalens Based on Phase-Change Material
Metasurfaces have provided new opportunities for the realization of flat lenses, among which tunable metalenses have garnered considerable attention due to their flexible functionalities. In this paper, we present a continuously tunable metalens based on the phase-change material Sb$_{2}$S$_{3}$, which enables precise and continuous focal length control through the transition …