Broadband Achromatic Metasurfaces for Longwave Infrared Applications

doi:10.3390/nano11102760

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	Broadband Achromatic Metasurfaces for Longwave Infrared Applications
	N. T. Song; N. X. Xu; D. Z. Shan; Y. H. Zhao; J. S. Gao; Y. Tang; Q. Sun; X. Chen; Y. S. Wang and X. G. Feng
	2021
发表期刊	Nanomaterials
卷号	11 期号:10 页码:13
摘要	Longwave infrared (LWIR) optics are essential for several technologies, such as thermal imaging and wireless communication, but their development is hindered by their bulk and high fabrication costs. Metasurfaces have recently emerged as powerful platforms for LWIR integrated optics; however, conventional metasurfaces are highly chromatic, which adversely affects their performance in broadband applications. In this work, the chromatic dispersion properties of metasurfaces are analyzed via ray tracing, and a general method for correcting chromatic aberrations of metasurfaces is presented. By combining the dynamic and geometric phases, the desired group delay and phase profiles are imparted to the metasurfaces simultaneously, resulting in good achromatic performance. Two broadband achromatic metasurfaces based on all-germanium platforms are demonstrated in the LWIR: a broadband achromatic metalens with a numerical aperture of 0.32, an average intensity efficiency of 31%, and a Strehl ratio above 0.8 from 9.6 mu m to 11.6 mu m, and a broadband achromatic metasurface grating with a constant deflection angle of 30 & DEG; from 9.6 mu m to 11.6 mu m. Compared with state-of-the-art chromatic-aberration-restricted LWIR metasurfaces, this work represents a substantial advance and brings the field a step closer to practical applications.
DOI	10.3390/nano11102760
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收录类别	SCI
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/65078
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	N. T. Song,N. X. Xu,D. Z. Shan,et al. Broadband Achromatic Metasurfaces for Longwave Infrared Applications[J]. Nanomaterials,2021,11(10):13.
APA	N. T. Song.,N. X. Xu.,D. Z. Shan.,Y. H. Zhao.,J. S. Gao.,...&Y. S. Wang and X. G. Feng.(2021).Broadband Achromatic Metasurfaces for Longwave Infrared Applications.Nanomaterials,11(10),13.
MLA	N. T. Song,et al."Broadband Achromatic Metasurfaces for Longwave Infrared Applications".Nanomaterials 11.10(2021):13.

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