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Photonics
Special Issues
Nanophotonics, Metasurface, and Topological Photonic Crystals: Physics and Applications
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Nanophotonics, Metasurface, and Topological Photonic Crystals: Physics and Applications

A special issue of Photonics (ISSN 2304-6732).

Deadline for manuscript submissions: closed (10 June 2023) | Viewed by 9397

Special Issue Editors

Dr. Jietao Liu

E-Mail Website
Guest Editor
Laboratory of Photonic Integrated Circuits, Xiongan Institute of Innovation, Chinese Academy of Sciences, Xiong’an New Area, Baoding 071700, China
Interests: nanostructures metamaterials; nanophotonic photoelectronic devices; metasurface and plasmonic; lens-less imaging; computational imaging; imaging through scattering media
Dr. Jin Li

E-Mail Website
Guest Editor
College of Information Science and Engineering, Northeastern University, Shenyang, China
Interests: Optical fiber sensors; Microfiber sensors; Integration optical devices; Gas sensing based on semiconductor materials
Special Issues, Collections and Topics in MDPI journals
Dr. Bo Cheng

E-Mail Website
Guest Editor
Laboratory of Nano Photoelectron, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
Interests: polarization imaging; nanophotonic photoelectronic devices; meta-surface and metamaterials; photonic crystal
Dr. Minghao Chao

E-Mail Website
Guest Editor Assistant
Institute of Semiconductors, Chinese Academy of Sciences, University of Chinese Academy of Sciences, No. 35, Tsinghua East Road, Beijing 100091, China
Interests: topological photonics; photonic crystals; metasurface; photodetector; silicon photonics; electro-optic modulators; bound states in the continuum

Special Issue Information

Dear Colleagues,

We are pleased to invite you to contribute your work to this Special Issue. In recent decades, researchers have witnessed the improvement and exciting novel results and applications of nanophotonics, metamaterials, and plasmonics. The current and emerging applications of topological photonic crystals and photonic BICs and their role in shaping the interaction of light and matter has revolutionized the way of photonic-devices design. The physics, formation mechanisms, and design of topological PhC and BIC has shed new light on applications in integrated photonics and novel fields. These advances have led to extraordinary performance and novel phenomena, as well as having opened the door for new applications, including light guiding and bending, routing, lasing, sensing, optical communications, optical computing, non-linear optics, and quantum optics, etc.

We strongly encourage the submission of articles for this Special Issue. Both original research papers and review articles describing state-of-the-art innovations in this research field are welcome. This Special Issue will cover a range of topics from the field, including but not limited to the following:

  • Vector beams based on metasurface;
  • Polarized photonic device based on metasurface;
  • Imaging polarimetry using metasurface;
  • High-efficiency subwavelength imaging metasurface;
  • Metasurface for light wavefront shaping;
  • Wavefront shaping for imaging behind turbid medium;
  • Computational imaging through scattering medium;
  • Advanced nanophotonic devices design;
  • Topological photonic crystals;
  • Photonic bound states in the continuum;
  • Other related applications of plasmonics and topological photonics.

Dr. Jietao Liu
Dr. Jin Li
Dr. Bo Cheng
Guest Editors

Dr. Minghao Chao
Guest Editor Assistant

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Photonics is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • subwavelength nanostructure
  • metasurface for light manipulation and imaging
  • imaging through scattering
  • topological photonic crystals

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (5 papers)

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Research

10 pages, 3211 KiB  
Article
Sensing Performance of Ethanol Microfiber Probe Augmented by ZnO Nanosheet and UV Glue Film
by Fuhua Liu, Hongtao Dang, Ruixin Tian, Jin Li, Juan Wang and Dewen Wang
Photonics 2023, 10(6), 656; https://doi.org/10.3390/photonics10060656 - 6 Jun 2023
Viewed by 1231
Abstract
A microfiber reflective ethanol gas sensing probe was designed and fabricated. The single-mode fiber was heated and stretched to prepare a microfiber taper, on which a mixed material of ZnO nanosheets and UV glue was built by the dip-coating method. The influencing factors [...] Read more.
A microfiber reflective ethanol gas sensing probe was designed and fabricated. The single-mode fiber was heated and stretched to prepare a microfiber taper, on which a mixed material of ZnO nanosheets and UV glue was built by the dip-coating method. The influencing factors on its sensing performance for ethanol have been discussed, including the dozen ratio of ZnO nanosheets, UV glue materials, and end-face morphology. As the concentration of ethanol gas increased, the intensity of the reflection spectrum increased with the responding sensitivity of 7.28 × 10−4 dBm/ppm. The exchanging efficiency of the optical signal is enhanced by the strong evanescent field of the microfiber taper. This sensing probe is convenient for high-density integration and working in a small space and is capable of high-performance monitoring for ethanol at room temperature. Full article
(This article belongs to the Special Issue Nanophotonics, Metasurface, and Topological Photonic Crystals: Physics and Applications)
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13 pages, 6356 KiB  
Article
Mie Scattering Nanointerferometry for the Reconstruction of Tightly Focused Vector Fields by Polarization Decomposition
by Dong Yang, Haifeng Hu, Han Gao, Jian Chen and Qiwen Zhan
Photonics 2023, 10(5), 496; https://doi.org/10.3390/photonics10050496 - 26 Apr 2023
Viewed by 1928
Abstract
Tightly focused vector fields, which can be generated by focusing a light beam through a high-numerical-aperture objective, play an important role in nano-optics research. How to fully characterize this kind of field in the subwavelength scale is a challenging but important task. The [...] Read more.
Tightly focused vector fields, which can be generated by focusing a light beam through a high-numerical-aperture objective, play an important role in nano-optics research. How to fully characterize this kind of field in the subwavelength scale is a challenging but important task. The Mie scattering nanointerferometry technique has been proposed to reconstruct the tightly focused vector field accurately. In this work, we theoretically demonstrate that the technique can be realized by collecting the transmitted light with two orthogonal polarization states simultaneously. Therefore, when nanoparticles are employed to scan the fields to be measured, more information of the scattering field can be acquired in the far field. This is helpful for solving the linear inverse scattering problem by reducing the number of scanning points, thus making the measurement more efficient. Full article
(This article belongs to the Special Issue Nanophotonics, Metasurface, and Topological Photonic Crystals: Physics and Applications)
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14 pages, 4060 KiB  
Communication
Polarization-Insensitive, Orthogonal Linearly Polarized and Orthogonal Circularly Polarized Synthetic Aperture Metalenses
by Jijian Hu, Zhenghong Dong, Xuanwen Yang, Lurui Xia, Xueqi Chen and Yan Lu
Photonics 2023, 10(4), 348; https://doi.org/10.3390/photonics10040348 - 23 Mar 2023
Cited by 2 | Viewed by 1465
Abstract
Metalenses have attracted much attention from researchers because they are thin, multifunctional and easy to integrate. However, due to the limitation of fabrication techniques and the influence of working wavelength, it is difficult to realize a large aperture. In this paper, we design [...] Read more.
Metalenses have attracted much attention from researchers because they are thin, multifunctional and easy to integrate. However, due to the limitation of fabrication techniques and the influence of working wavelength, it is difficult to realize a large aperture. In this paper, we design and simulate polarization-insensitive, orthogonal linearly polarized and orthogonal circularly polarized synthetic aperture metalenses. We use a synthetic aperture to improve the cutoff frequency of the metalens and achieve an equivalent large-aperture metalens. We compare the modulation transfer function and focusing efficiency of synthetic aperture metalenses with different array structures. This work provides an effective solution to the needs of large-aperture metalenses, and metalenses with different polarizations can play an important role in polarization imaging. Full article
(This article belongs to the Special Issue Nanophotonics, Metasurface, and Topological Photonic Crystals: Physics and Applications)
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11 pages, 4461 KiB  
Communication
Demodulation of Fiber Specklegram Curvature Sensor Using Deep Learning
by Zihan Yang, Liangliang Gu, Han Gao and Haifeng Hu
Photonics 2023, 10(2), 169; https://doi.org/10.3390/photonics10020169 - 5 Feb 2023
Cited by 10 | Viewed by 2173
Abstract
In this paper, a learning-based fiber specklegram sensor for bending recognition is proposed and demonstrated. Specifically, since the curvature-induced variations of mode interference in optical fibers can be characterized by speckle patterns, Resnet18, a classification model based on convolutional neural network architecture with [...] Read more.
In this paper, a learning-based fiber specklegram sensor for bending recognition is proposed and demonstrated. Specifically, since the curvature-induced variations of mode interference in optical fibers can be characterized by speckle patterns, Resnet18, a classification model based on convolutional neural network architecture with excellent performance, is used to identify the bending state and disturbed position simultaneously according to the speckle patterns collected from the distal end of the multimode fiber. The feasibility of the proposed scheme is verified by rigorous experiments, and the test results indicate that the proposed sensing system is effective and robust. The accuracy of the trained model is 99.13%, and the prediction speed can reach 4.75 ms per frame. The scheme proposed in this work has the advantages of low cost, easy implementation, and a simple measurement system and is expected to find applications in distributed sensing and bending identification in complex environments. Full article
(This article belongs to the Special Issue Nanophotonics, Metasurface, and Topological Photonic Crystals: Physics and Applications)
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7 pages, 6555 KiB  
Communication
Metasurfaces Excited by an Evanescent Wave for Terahertz Beam Splitters with a Tunable Splitting Ratio
by Wenqi Zhu, Jinhui Lu, Min Zhang, Hong Su, Ling Li, Qi Qin and Huawei Liang
Photonics 2023, 10(2), 118; https://doi.org/10.3390/photonics10020118 - 23 Jan 2023
Viewed by 1801
Abstract
In terahertz (THz) photonics, a beam splitter is an important component. Although various THz beam-splitting devices using several principles have been proposed, the splitting ratio of existing designs is not adjustable. Here, a THz beam splitter with an adjustable splitting ratio is demonstrated [...] Read more.
In terahertz (THz) photonics, a beam splitter is an important component. Although various THz beam-splitting devices using several principles have been proposed, the splitting ratio of existing designs is not adjustable. Here, a THz beam splitter with an adjustable splitting ratio is demonstrated using a metasurface integrated onto a prism. The metasurface excited by an evanescent wave can convert part of a linearly polarized incident wave into a cross-polarized wave and manipulate its phase simultaneously. As a result, the cross-polarized wave can pass through the interface, even if the incident angle is larger than the total internal reflection angle, while the co-polarized wave is reflected by the prism. The splitting ratio of the device can be adjusted from 4.56:1 to 0.63:1 by tuning the resonant response of the metasurface and varying the interval distance between the metasurface and the prism. The metasurface samples are fabricated using low-cost standard printed circuit technology, and the experimental results are consistent with the simulations. Therefore, the proposed beam splitter with a tunable splitting ratio is promising as a key component in the THz system. Full article
(This article belongs to the Special Issue Nanophotonics, Metasurface, and Topological Photonic Crystals: Physics and Applications)
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