Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/8168
Title: A Broad-Band Achromatic Polarization-Insensitive In-Plane Lens with High Focusing Efficiency
Authors: Atalay, İpek Anıl
Yılmaz, Yusuf Abdulaziz
Savaş, Fırat Cem
Kurt, Hamza
Keywords: Inverse design
objective-first algorithm
effective medium theory
cylindrical lens
wavefront shaping
Inverse Design
Metalens
Fabrication
Nm
Issue Date: 2021
Publisher: Amer Chemical Soc
Abstract: Until now, many pioneering studies have been conducted on multiwavelength achromatic lens designs that can eliminate chromatic aberrations at various wavelengths. In these studies, the working bandwidth is still not wide enough for practical applications, and an effective achromatic design is achieved with a long design cycle that determines critical elements of the unit cell. To solve the limitations of the unit cell method, we use inverse design to simultaneously explore structures with broad bandwidth and high efficiency. In this study, we show that it is possible to obtain an achromatic cylindrical lens that can focus transverse electric and transverse magnetic polarization between 1300 and 1750 nm using the objective-first algorithm. We implement the generalized Bruggeman effective medium theory to binarize the lens with randomly varying index profiles while maintaining the optical performance of the cylindrical inverse-designed lens. The binarized lens is produced via three-dimensional printing and tested in a microwave regime, exhibiting high bandwidth operation and high focusing efficiency (average 62%).
URI: https://doi.org/10.1021/acsphotonics.1c00721
https://hdl.handle.net/20.500.11851/8168
ISSN: 2330-4022
Appears in Collections:Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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