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http://hdl.handle.net/10397/88640
Title: | Dual-layer achromatic metalens design with an effective Abbe number | Authors: | Li, MM Li, SS Chin, LK Yu, YF Tsai, DP Chen, RS |
Issue Date: | Aug-2020 | Source: | Optics express, Aug. 2020, v. 28, no. 18, p. 26041-26055 | Abstract: | Planar achromatic metalenses with a thickness of the order of wavelength have attracted much attention for their potential applications in ultra-compact optical devices. However, realizing single-layer achromatic metalenses across a wide bandwidth requires that the corresponding meta-atoms have complex cross-sections for correct phase profile and dispersion compensation. Herein, we introduce an effective Abbe number and use lens maker equations to design a dual-layer achromatic metalens in which we compensate the dispersion by using a plano-convex liked metalens combined with a plano-concave liked metalens. The stacked metalens are designed based on simple high refractive index dielectric cylindrical meta-atoms with different radii, which simplify the design and fabrication processes. We demonstrate that a dual-layer achromatic metalens has a small focal length difference across the visible wavelength range and an average focusing efficiency above 50%, which proves that the design method is promising for many potential applications in multi-functional flat optical devices. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement | Publisher: | Optical Society of America | Journal: | Optics express | EISSN: | 1094-4087 | DOI: | 10.1364/OE.402478 | Rights: | © 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement (https://www.osapublishing.org/library/license_v1.cfm) Journal © 2020 © 2020 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved. The following publication Li, M. M., Li, S. S., Chin, L. K., Yu, Y. F., Tsai, D. P., & Chen, R. S. (2020). Dual-layer achromatic metalens design with an effective Abbe number. Optics Express, 28(18), 26041-26055 is available at https://dx.doi.org/10.1364/OE.402478 |
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Li_Dual-Layer_Achromatic_Metalens.pdf | 3.72 MB | Adobe PDF | View/Open |
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