Metalens: Applications and Manufacturing, Volume II

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanophotonics Materials and Devices".

Deadline for manuscript submissions: closed (28 February 2023) | Viewed by 5469

Special Issue Editors


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Guest Editor
Department of Optics and Photonics, National Central University, Taoyuan 32001, Taiwan
Interests: plasmonics; metamaterial; metasurface; nanophotonics
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Department of Photonics, National Cheng Kung University, Tainan 70101, Taiwan
Interests: metamaterial and metasurface; plasmonics; 2D materials; flat optics design and development; optoelectronic semiconductors; quantum optics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Benefiting from the development of nanofabrication technology, the metalens, as a breakthrough of optical design, has demonstrated tremendous capabilities in manipulating light including diffraction-limited focus spot, broadband achromaticism, wild field-of-view, polarization functionalities, etc. The ultrathin and ultralight features as the core advantage of the metalens are the ever-growing requirement of modern applications, such as in the fields of imaging, spectroscopy, color/polarization routing, tunable focusing, augmented/virtual reality, and other unexplored applications. Someday, the metalenses will make it into the industry and toward real applications when it meets commercial manufacturing capability.  

This is the second volume of the Special Issue "Metalens: Applications and Manufacturing". This Special Issue will be focused to cover the recent advances in newly developed state-of-the-art metalens-related topics, such as metalens for quantum information, polarization-multiplexed metalens, polarization-independent metalens, Complementary Metal-Oxide-Semiconductor (CMOS) compatible process for metasurface, low aspect ratio dielectric metasurface, materials for visible metalens, wafer-scale integration, and the characterization of metalens.

Prof. Dr. Chih-Ming Wang
Prof. Dr. Pin-Chieh Wu
Guest Editors

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Keywords

  • metalens
  • metamaterial
  • metasurface
  • dielectric metasurface
  • flat optics
  • meta-optics
  • CMOS compatible
  • wafer-scale integration

Published Papers (3 papers)

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Research

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12 pages, 3914 KiB  
Article
The Effect of Fabrication Error on the Performance of Mid-Infrared Metalens with Large Field-of-View
by Aoling Li, Jianhua Li, Honghui Jia, Huigao Duan and Yueqiang Hu
Nanomaterials 2023, 13(3), 440; https://doi.org/10.3390/nano13030440 - 21 Jan 2023
Cited by 5 | Viewed by 2068
Abstract
Mid-infrared large field-of-view (FOV) imaging optics play a vital role in infrared imaging and detection. The metalens, which is composed of subwavelength-arrayed structures, provides a new possibility for the miniaturization of large FOV imaging systems. However, the inaccuracy during fabrication is the main [...] Read more.
Mid-infrared large field-of-view (FOV) imaging optics play a vital role in infrared imaging and detection. The metalens, which is composed of subwavelength-arrayed structures, provides a new possibility for the miniaturization of large FOV imaging systems. However, the inaccuracy during fabrication is the main obstacle to developing practical uses for metalenses. Here, we introduce the principle and method of designing a large FOV doublet metalens at the mid-infrared band. Then, the quantitative relationship between the fabrication error and the performance of the doublet metalens with a large FOV from four different fabrication errors is explored by using the finite-difference time-domain method. The simulation results show that the inclined sidewall error has the greatest impact on the focusing performance, and the interlayer alignment error deforms the focusing beam and affects the focusing performance, while the spacer thickness error has almost no impact on the performance. The contents discussed in this paper can help manufacturers determine the allowable processing error range of the large FOV doublet metalens and the priority level for optimizing the process, which is of significance. Full article
(This article belongs to the Special Issue Metalens: Applications and Manufacturing, Volume II)
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15 pages, 4071 KiB  
Article
Elliptical Supercritical Lens for Shaping Sub-Diffractive Transverse Optical Needle
by Jian Lei, Minghui Wang, Jin Wu, Hui Duan, Kun Zhang, Sicong Wang, Yaoyu Cao, Xiangping Li and Fei Qin
Nanomaterials 2023, 13(2), 242; https://doi.org/10.3390/nano13020242 - 5 Jan 2023
Cited by 1 | Viewed by 1747
Abstract
Supercritical lens can create a sub-diffraction-limited focal spot in the far field, providing a promising route for the realization of label-free super-resolution imaging through the point scanning mechanism. However, all of the reported supercritical lenses have circular shape configurations, and produce isotropic sub-diffraction-limited [...] Read more.
Supercritical lens can create a sub-diffraction-limited focal spot in the far field, providing a promising route for the realization of label-free super-resolution imaging through the point scanning mechanism. However, all of the reported supercritical lenses have circular shape configurations, and produce isotropic sub-diffraction-limited focal spots in the focal plane. Here, we propose and experientially demonstrate a sub-diffraction transverse optical needle by using an elliptical supercritical lens. Through breaking the circular symmetry and introducing ellipticity to the lens, a uniform sub-diffractive transverse optical needle with lateral length and width of 6λ/NA and 0.45λ/NA, respectively, was successfully created in the focal plane. Further, elliptical sector-shape cutting with an optimized apex angle of 60 degrees can lead to suppressed subsidiary focusing for improved uniformity and condensed field intensity of the transverse optical needle. The demonstration of sub-diffractive transverse optical needle with a high aspect ratio (length to width ratio) of 13:1 may find potential applications in line-scanning microscopy for video-rate label-free super-resolution imaging, and also enable advances in the fields from laser manufacturing to optical manipulation. Full article
(This article belongs to the Special Issue Metalens: Applications and Manufacturing, Volume II)
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Review

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24 pages, 4611 KiB  
Review
Review of Metasurfaces and Metadevices: Advantages of Different Materials and Fabrications
by Wei-Lun Hsu, Yen-Chun Chen, Shang Ping Yeh, Qiu-Chun Zeng, Yao-Wei Huang and Chih-Ming Wang
Nanomaterials 2022, 12(12), 1973; https://doi.org/10.3390/nano12121973 - 8 Jun 2022
Cited by 23 | Viewed by 4391
Abstract
Flat optics, metasurfaces, metalenses, and related materials promise novel on-demand light modulation within ultrathin layers at wavelength scale, enabling a plethora of next-generation optical devices, also known as metadevices. Metadevices designed with different materials have been proposed and demonstrated for different applications, and [...] Read more.
Flat optics, metasurfaces, metalenses, and related materials promise novel on-demand light modulation within ultrathin layers at wavelength scale, enabling a plethora of next-generation optical devices, also known as metadevices. Metadevices designed with different materials have been proposed and demonstrated for different applications, and the mass production of metadevices is necessary for metadevices to enter the consumer electronics market. However, metadevice manufacturing processes are mainly based on electron beam lithography, which exhibits low productivity and high costs for mass production. Therefore, processes compatible with standard complementary metal–oxide–semiconductor manufacturing techniques that feature high productivity, such as i-line stepper and nanoimprint lithography, have received considerable attention. This paper provides a review of current metasurfaces and metadevices with a focus on materials and manufacturing processes. We also provide an analysis of the relationship between the aspect ratio and efficiency of different materials. Full article
(This article belongs to the Special Issue Metalens: Applications and Manufacturing, Volume II)
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