Multiobjective Optimization of Bespoke Gradient-Index Lenses: A Powerful Tool for Overcoming the Limitations of Transformation Optics

被引：3
|
作者：
Xu, Jingwei [1 ]
Whiting, Eric B. [1 ]
Campbell, Sawyer D. [1 ]
Werner, Pingjuan L. [1 ]
Werner, Douglas H. [1 ]
Bossard, Jeremy A. [2 ]
Barrett, John P. [2 ]
Withrow, Joshua W. [3 ]
Weigner, James D. [3 ]
机构：
[1] Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA
[2] Lockheed Martin, Rotary & Mission Syst, Moorestown, NJ USA
[3] Lockheed Martin, Rotary & Mission Syst, Syracuse, NY USA
来源：
PHYSICAL REVIEW APPLIED | 2022年 / 18卷 / 02期
关键词：
LUNEBURG LENS; METAMATERIAL LENS; ANTENNA; DESIGN; ULTRAWIDEBAND; ENHANCEMENT; WAVE;
D O I：
10.1103/PhysRevApplied.18.024021
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Gradient-index (GRIN) lenses have paved the way for electromagnetic wave tailoring due to their spa-tially varying permittivities, which enable continuous manipulation of the wave as it passes through the lens volume. However, traditional GRIN design methodologies, such as transformation optics or geomet-rical optics, often generate lens profiles that are limited to single-band performance. Here, we propose a multiobjective optimization strategy customized for designing dual-band GRIN lenses. Utilizing this powerful inverse-design tool, in conjunction with an advanced manufacturing technique, a GRIN lens with compact size and nonintuitive permittivity distribution is designed, fabricated, and characterized. The lens is capable of realizing two unique gain enhancement objectives at the L and C bands simultaneously, where different feeding sources are employed at the two bands.
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页数：9
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