Achromatic metasurface lens at visible wavelengths

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2018,（6）
• 页码范围: 333-335
• 页数: 3页
• 语种: 英文

摘要

Lenses,such as optical lens,electron lens,acoustic lens and so on,are devices that can focus waves to form an image.Since the invention of telescopes and objectives,optical lenses play important roles in observing objects from molecular to astronomical levels,and high-resolution lithography using optical,electron or X-ray beams.To improve the imaging quality,usually,the multiple lenses in a conventional system needs to be carefully designed and aligned to reduce the spherical aberration,coma,chromatic aberration,etc (see Fig.1).