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9 September 2019 Imaging with ultra-lightweight flat lenses: visible near-IR to long-wave IR (Conference Presentation)
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In this presentation, we will describe the design, fabrication and characterization of flat lenses that operate in any desired spectral regime. Specifically, we will describe flat lenses in the visible band, in the visible and near-IR band, and also in the LWIR band. We have shown that multi-level diffractive optics, when designed properly can enable high efficiency broadband imaging [1]. Here, we will extend the performance to the IR and show experimental results. We further compare our optics with metalenses, and emphasize that metalenses offer no additional advantage [2]. In fact, metalenses are far more challenging to fabricate. Please refer to papers below for details. [1] M. Meem, A. Majumder and R. Menon, “Full-color video and still imaging using two flat lenses,” Opt. Exp. 26(21) 26866-26871 (2018). [2] S. Banerji, M. Meem, B. Sensale-Rodriguez and R. Menon, “Imaging with flat optics: metalenses or diffractive lenses?,” arXiv:1901.05042 [physics.optics]
Conference Presentation
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Sourangsu Banerji, Monjurul F. Meem, Apratim Majumder, Berardi Sensale-Rodriguez, and Rajesh Menon "Imaging with ultra-lightweight flat lenses: visible near-IR to long-wave IR (Conference Presentation)", Proc. SPIE 11105, Novel Optical Systems, Methods, and Applications XXII, 111050H (9 September 2019);

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