基于硫系玻璃的宽带消色差远红外超透镜参数化拓扑优化设计

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Abstract： Metalens technology has been applied extensively in miniaturized integrated infrared imaging systems.However， due to the high phase dispersion unit structures，metalens ten exhibits chromatic aberration， making broadb achromatic infrared imaging challenging to achieve. In this paper， six different unit structures based on chalcogenide glass are constructed， their phase-dispersion parameters are analyzed to establish a database. On this basis，using chromatic aberration compensation parameterized adjoint topology optimization，a broadb achromatic metalens with a numerical aperture 0.5 is designed byarranging these six unit structures in the far-infrared b. Simulation results show that the metalens achieves near diffraction-limited focusing within the operating wavelength range 9-11μm ，demonstrating the good performance achromatic aberration with flat focusing efficiency 54%-58% across all wavelengths.

Key words： metalens; chalcogenide glass; topology optimization; high efficiency; long wave infrared; broadb operation

摘要：超透镜技术在小型化、集成化红外成像系统中有着广泛的应用。（剩余22555字）