An achromatic metafiber for focusing and imaging across the entire telecommunication range.
An achromatic metafiber for focusing and imaging across the entire telecommunication range.
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DOI：
10.1038/s41467-022-31902-3
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发表时间：
2022-07-19
影响因子：
16.6
通讯作者：
中科院分区：
文献类型：
--
作者：
色散工程对包括光纤器件在内的大多数现代光学系统的性能至关重要。尽管用于内窥镜应用的米级单模光纤的色散可以忽略不计，但位于光纤端面上用于光学聚焦和成像的光学透镜会受到强烈的色差的影响。在这里，我们提出了在单模光纤端面上设计和纳米打印3D消色差衍射超透镜，能够在整个近红外通信波长范围为1.25至1.65µm的波段上进行消色差和偏振不敏感聚焦。这代表了商用光纤的整个单模领域。三维纳米柱元原子的非锁定高度自由度极大地提高了消色差超构透镜时带宽积的上界，达到21.34，使得群延迟调制范围从−8到14 fs不等。此外，我们展示了使用我们的紧凑和灵活的消色差光纤共聚焦成像，能够在宽带光照明下创建聚焦清晰的图像。这些结果可能会释放光纤元光学广泛应用的全部潜力，包括高光谱内窥镜成像、飞秒激光辅助治疗、深层组织成像、波长复用光纤通信、光纤传感和光纤激光器。作者在单模光纤的端面上制作了三维消色差衍射超透镜，用于内窥镜应用。它们在整个近红外通信波长范围为1.25至1.65µm的波段上表现出消色差和偏振不敏感聚焦。
Dispersion engineering is essential to the performance of most modern optical systems including fiber-optic devices. Even though the chromatic dispersion of a meter-scale single-mode fiber used for endoscopic applications is negligible, optical lenses located on the fiber end face for optical focusing and imaging suffer from strong chromatic aberration. Here we present the design and nanoprinting of a 3D achromatic diffractive metalens on the end face of a single-mode fiber, capable of performing achromatic and polarization-insensitive focusing across the entire near-infrared telecommunication wavelength band ranging from 1.25 to 1.65 µm. This represents the whole single-mode domain of commercially used fibers. The unlocked height degree of freedom in a 3D nanopillar meta-atom largely increases the upper bound of the time-bandwidth product of an achromatic metalens up to 21.34, leading to a wide group delay modulation range spanning from −8 to 14 fs. Furthermore, we demonstrate the use of our compact and flexible achromatic metafiber for fiber-optic confocal imaging, capable of creating in-focus sharp images under broadband light illumination. These results may unleash the full potential of fiber meta-optics for widespread applications including hyperspectral endoscopic imaging, femtosecond laser-assisted treatment, deep tissue imaging, wavelength-multiplexing fiber-optic communications, fiber sensing, and fiber lasers. The authors fabricate a 3D achromatic diffractive metalens on the end face of a single-mode fiber, useful for endoscopic applications. They demonstrate achromatic and polarization insensitive focusing across the entire near-infrared telecommunication wavelength band ranging from 1.25 to 1.65 µm.
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影响因子：
4.6
作者：
Kasztelanic R;Filipkowski A;Anuszkiewicz A;Stafiej P;Stepniewski G;Pysz D;Krzyzak K;Stepien R;Klimczak M;Buczynski R
通讯作者：
Buczynski R
影响因子：
7.7
作者：
Antonini A;Sattin A;Moroni M;Bovetti S;Moretti C;Succol F;Forli A;Vecchia D;Rajamanickam VP;Bertoncini A;Panzeri S;Liberale C;Fellin T
通讯作者：
Fellin T
影响因子：
16.6
作者：
Gissibl T;Thiele S;Herkommer A;Giessen H
通讯作者：
Giessen H
影响因子：
17.1
作者：
Consales, Marco;Ricciardi, Armando;Cusano, Andrea
通讯作者：
Cusano, Andrea
影响因子：
3.8
作者：
Fathnan, Ashif A.;Powell, David A.
通讯作者：
Powell, David A.