Journal article
Applied Physics Letters, 2020
APA
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Meem, M., Banerji, S., Majumder, A., Pies, C., Oberbiermann, T., Sensale‐Rodriguez, B., & Menon, R. (2020). Inverse-designed achromatic flat lens enabling imaging across the visible and near-infrared with diameter > 3 mm and NA = 0.3. Applied Physics Letters.
Chicago/Turabian
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Meem, Monjurul, Sourangsu Banerji, Apratim Majumder, C. Pies, Timo Oberbiermann, B. Sensale‐Rodriguez, and R. Menon. “Inverse-Designed Achromatic Flat Lens Enabling Imaging across the Visible and near-Infrared with Diameter ≫ 3 Mm and NA = 0.3.” Applied Physics Letters (2020).
MLA
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Meem, Monjurul, et al. “Inverse-Designed Achromatic Flat Lens Enabling Imaging across the Visible and near-Infrared with Diameter ≫ 3 Mm and NA = 0.3.” Applied Physics Letters, 2020.
BibTeX Click to copy
@article{monjurul2020a,
title = {Inverse-designed achromatic flat lens enabling imaging across the visible and near-infrared with diameter > 3 mm and NA = 0.3},
year = {2020},
journal = {Applied Physics Letters},
author = {Meem, Monjurul and Banerji, Sourangsu and Majumder, Apratim and Pies, C. and Oberbiermann, Timo and Sensale‐Rodriguez, B. and Menon, R.}
}
It is generally thought that correcting chromatic aberrations in imaging requires multiple surfaces. Here, we show that by allowing the phase in the image plane of a flat lens to be a free parameter, it is possible to correct chromatic aberrations over a large continuous bandwidth with a single diffractive surface. We experimentally demonstrate imaging using a single flat lens of diameter > 3mm, focal length = 5mm (NA = 0.3, f/1.59) that is achromatic from 0.45um to 1um. This combination of size, NA and operating bandwidth has not been demonstrated in a flat lens before. We experimentally characterized the point-spread functions, off-axis aberrations and the broadband imaging performance. In contrast to conventional lens design, we utilize inverse design, where phase in the focal plane is treated as a free parameter. This approach attains a phase-only (lossless) pupil function, which can be implemented as a multi-level diffractive flat lens that achieves achromatic focusing and imaging.