Continuous varifocal metalens based on phase-change material

Journal of Optics, Journal Year: 2025, Volume and Issue: 27(2), P. 025104 - 025104

Published: Jan. 28, 2025

Abstract Metasurfaces have provided new opportunities for the realization of flat lenses, among which tunable metalenses garnered considerable attention due to their flexible functionalities. In this paper, we present a continuously metalens based on phase-change material Sb 2 S 3 , enables precise and continuous focal length control through transition states. Under excitation linearly polarized light at 1550 nm, phase compensation is by changing crystallization state nanopillars, allowing shift between 36 µ m 48 m. At same time, maintains high focusing efficiency over 75%. This approach provides greater design flexibility broader applicability across diverse applications. By reducing reliance sources, it enhances device integration tunability, paving way in practical implementation advanced optical imaging nanophotonics.

Language: Английский

Phase-change materials and their applications

Journal of Applied Physics, Journal Year: 2025, Volume and Issue: 137(13)

Published: April 1, 2025

Language: Английский

Transforming High-Resolution Imaging: A Comprehensive Review of Advances in Metasurfaces and Metalenses

Materials Today Physics, Journal Year: 2024, Volume and Issue: unknown, P. 101628 - 101628

Published: Dec. 1, 2024

Language: Английский