Mid-infrared free space wavelength beam splitter based on dual frequency reflective metalens. (1st August 2022)

• Record Type: Journal Article
• Authors: Wu, Boqi; Chi, Yaodan; Zhang, Hengxu; Zhao, Chunlei; Zhao, Yang; Lv, Sa; Yang, Jia
• Is Part Of: Japanese journal of applied physics. Volume 61:Number 8(2022)
• Publication Date: 2022-08-01
• Subjects: metalens -- photonics integration -- metasurface -- holographic image; Physics -- Periodicals; 621.05
• DOI: 10.35848/1347-4065/ac7bc9
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: We present a reflective metalens with a hybrid antenna structure, which can realize the beam splitting function of two wavelengths in free space. A key feature of our design is the presence of phase-independent regulation at two different wavelengths in each nanoresonator, which can generate a specific phase or a continuous sweep in the range of 0° to more than 300°. To demonstrate the wavefront manipulation ability of the array, we simulated the characteristics of wavelength beam splitting, especially the free space wavelength beam splitter with a focal length of 300 μ m and a relative focal position of 100 μ m.