光学
贝塞尔光束
贝塞尔函数
衍射
电介质
光束
梁(结构)
材料科学
衍射效率
光圈(计算机存储器)
数值孔径
物理
变换光学
极化(电化学)
波长
光电子学
超材料
物理化学
化学
声学
作者
Fengjun Li,Shuai Wang,Xiangping Li,Zi‐Lan Deng
出处
期刊:Optics Letters
[Optica Publishing Group]
日期:2022-03-07
卷期号:47 (6): 1375-1375
被引量:2
摘要
Bessel beams, with their non-diffractive property, have attracted great interest in recent years. Optical needle shaping of Bessel beams is highly desired in many applications, however, this typically requires low numerical aperture (NA) bulky 4f confocal systems incorporated with spatial light modulators or round filters. Here, we employ a circular dielectric metagrating for perfect Bessel beam transformation at a desired wavelength. The dielectric metagrating exhibits a high transmissive diffraction efficiency (up to 75%) for a broadband (460 nm to 560 nm), wide-angle range, and dual-polarization response, which is capable of a high-performance transformation of Bessel beams with arbitrary NAs. Our results show potential for special-beam-required applications such as light storage, imaging, and optical manipulation.
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