论文标题
具有广阔视野的二次金属的宽带行为
Broadband behavior of quadratic metalenses with a wide field of view
论文作者
论文摘要
金属镜吸引了在平面和紧凑型设备中实施复杂的光学功能的极大兴趣。但是，色差和轴畸变仍然存在挑战。在这里，我们基于二次相位剖面，实验研究了金属的宽带行为。我们表明，这些金属不仅保证了任意较大的视野，而且对纵向和横向色差的宽容固有地宽容。因此，我们展示了一个单层硅金属，其视野为86°，带宽高达140 nm，在1300 nm和1550 nm电信波长频段下运行。
Metalenses are attracting a large interest for the implementation of complex optical functionalities in planar and compact devices. However, chromatic and off-axis aberrations remain standing challenges. Here, we experimentally investigate the broadband behavior of metalenses based on quadratic phase profiles. We show that these metalenses do not only guarantee an arbitrarily large field of view but are also inherently tolerant to longitudinal and transverse chromatic aberrations. As such, we demonstrate a single-layer, silicon metalens with a field of view of 86° and a bandwidth up to 140 nm operating at both 1300 nm and 1550 nm telecommunication wavelength bands.
