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Micromachines
Special Issues
Tunable Nanophotonics and Reconfigurable Metadevices
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Tunable Nanophotonics and Reconfigurable Metadevices

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "A：Physics".

Deadline for manuscript submissions: closed (31 May 2022) | Viewed by 19086

Special Issue Editors

Dr. Benfeng Bai

E-Mail Website
Guest Editor
Department of Precision Instrument, Tsinghua University, Beijing 100084, China
Interests: nanophotonics; near-field optics; nanometrology; characterization of micro- and nanomaterials
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Yuancheng Fan

E-Mail Website
Guest Editor
School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710129, China
Interests: terahertz metasurface; terahertz technology; 2D optics; computational optics
Special Issues, Collections and Topics in MDPI journals
Dr. Yu-Sheng Lin

E-Mail Website
Guest Editor
School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou 510006, China
Interests: MEMS; metamaterials; nanophotonics; microfluidics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Photonic nano/microstructures (e.g., metamaterials and metasurfaces) with tunable properties provide new possibilities for the manipulation of light–matter interactions on the nanoscale, enabling many emerging technologies for novel applications such as advanced imaging, large-bandwidth and high-speed communications, flexible and high-contrast displays, high-capacity data storage, optical computing, and biomedical technologies. Tunable nanophotonics and reconfigurable metadevices are becoming hotspots in optics, since the precise control of optical properties becomes possible and comes across future applications. Incorporating various tunable materials or reconfigurable structures is a straightforward route for the realization of tunable nanophotonics. Many active tuning and driving methods are also being introduced to increase the flexibility and applicability. This Special Issue focuses on tunable nanophotonics and reconfigurable metadevices, and will collect some of the most recent studies in this area. It aims to gather high-quality research contributions dealing with tunable nanophotonics physics and devices spanning the whole electromagnetic spectrum. The Special Issue welcomes contributions in a wide range of topics including, but not limited to:

  • Advanced passive and active nanophotonics;
  • New physics and phenomena of tunable nanophotonics;
  • Novel designs of functional tunable nanophotonic devices;
  • Reconfigurable metamaterials and metasurfaces;
  • Tunable nanophotonics based on 2D materials;
  • New materials for tunable nanophotonics and reconfigurable metadevices;
  • Tunable nanophotonics and reconfigurable devices for novel applications in imaging, light shaping, display, communications, biomedical technology, etc.;
  • Active and nonlinear nanoplasmonics and metamaterials;
  • MEMS-based metamaterials and metadevices;
  • Tunable metamaterials and metasurfaces in the terahertz and microwave regime;
  • Nanofabrication and manufacturing of tunable nanophotonic devices;
  • Bio-engineered nanoplasmonics and metamaterials;

Characterization of nanophotonic structures and devices.

Prof. Dr. Benfeng Bai
Prof. Dr. Yuancheng Fan
Dr. Yu-Sheng Lin
Guest Editors

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. Micromachines 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 2600 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

  • Nanophotonics
  • Metamaterials
  • Metasurfaces
  • Light–matter interaction
  • Plasmonics
  • Nonlinear optics

Published Papers (6 papers)

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Editorial

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2 pages, 158 KiB  
Editorial
Editorial for the Special Issue on Tunable Nanophotonics and Reconfigurable Metadevices
by Yuancheng Fan, Benfeng Bai and Yusheng Lin
Micromachines 2023, 14(3), 544; https://0-doi-org.brum.beds.ac.uk/10.3390/mi14030544 - 26 Feb 2023
Viewed by 1050
Abstract
Photonic nano/microstructures (e [...] Full article
(This article belongs to the Special Issue Tunable Nanophotonics and Reconfigurable Metadevices)

Research

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10 pages, 1913 KiB  
Article
Metasurface-Based Quantum Searcher on a Silicon-On-Insulator Chip
by Zeyong Wei, Haoyu Li, Linyuan Dou, Lingyun Xie, Zhanshan Wang and Xinbin Cheng
Micromachines 2022, 13(8), 1204; https://0-doi-org.brum.beds.ac.uk/10.3390/mi13081204 - 28 Jul 2022
Cited by 4 | Viewed by 1702
Abstract
Optical analog computing has natural advantages of parallel computation, high speed and low energy consumption over traditional digital computing. To date, research in the field of on-chip optical analog computing has mainly focused on classical mathematical operations. Despite the advantages of quantum computing, [...] Read more.
Optical analog computing has natural advantages of parallel computation, high speed and low energy consumption over traditional digital computing. To date, research in the field of on-chip optical analog computing has mainly focused on classical mathematical operations. Despite the advantages of quantum computing, on-chip quantum analog devices based on metasurfaces have not been demonstrated so far. In this work, based on a silicon-on-insulator (SOI) platform, we illustrated an on-chip quantum searcher with a characteristic size of 60 × 20 μm2. We applied classical waves to simulate the quantum search algorithm based on the superposition principle and interference effect, while combining it with an on-chip metasurface to realize modulation capability. The marked items are found when the incident waves are focused on the marked positions, which is precisely the same as the efficiency of the quantum search algorithm. The proposed on-chip quantum searcher facilitates the miniaturization and integration of wave-based signal processing systems. Full article
(This article belongs to the Special Issue Tunable Nanophotonics and Reconfigurable Metadevices)
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10 pages, 26904 KiB  
Article
Surface Plasmon Resonance of Large-Size Ag Nanobars
by Fan Wu, Lin Cheng and Wenhui Wang
Micromachines 2022, 13(4), 638; https://0-doi-org.brum.beds.ac.uk/10.3390/mi13040638 - 18 Apr 2022
Cited by 4 | Viewed by 2477
Abstract
Silver nanobars have attracted much attention due to their distinctive localized surface plasmon resonance (LSPR) in the visible and near-infrared regions. In this work, large-size Ag nanobars (length: 400~1360 nm) working at a longer-wavelength near-infrared range (>1000 nm) have been synthesized. By using [...] Read more.
Silver nanobars have attracted much attention due to their distinctive localized surface plasmon resonance (LSPR) in the visible and near-infrared regions. In this work, large-size Ag nanobars (length: 400~1360 nm) working at a longer-wavelength near-infrared range (>1000 nm) have been synthesized. By using the finite-difference time-domain (FDTD) simulation, the LSPR properties of a single large-size Ag nanobar are systematically investigated. The LSPR in Ag nanobar can be flexibly tuned in a wide wavelength range (400~2000 nm) by changing the bar length or etching the bar in the length direction. Our work provides a flexible way to fabricate nanoparticle arrays using large-size nanobars and throws light on the applications of large-size nanomaterials on wide spectral absorbers, LSPR-based sensors and nanofilters. Full article
(This article belongs to the Special Issue Tunable Nanophotonics and Reconfigurable Metadevices)
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11 pages, 6650 KiB  
Article
Reconfigurable Metalens with Phase-Change Switching between Beam Acceleration and Rotation for 3D Depth Imaging
by Zhiyuan Ma, Siyu Dong, Xiong Dun, Zeyong Wei, Zhanshan Wang and Xinbin Cheng
Micromachines 2022, 13(4), 607; https://0-doi-org.brum.beds.ac.uk/10.3390/mi13040607 - 13 Apr 2022
Cited by 14 | Viewed by 3446
Abstract
Depth imaging is very important for many emerging technologies, such as artificial intelligence, driverless vehicles and facial recognition. However, all these applications demand compact and low-power systems that are beyond the capabilities of most state-of-art depth cameras. Recently, metasurface-based depth imaging that exploits [...] Read more.
Depth imaging is very important for many emerging technologies, such as artificial intelligence, driverless vehicles and facial recognition. However, all these applications demand compact and low-power systems that are beyond the capabilities of most state-of-art depth cameras. Recently, metasurface-based depth imaging that exploits point spread function (PSF) engineering has been demonstrated to be miniaturized and single shot without requiring active illumination or multiple viewpoint exposures. A pair of spatially adjacent metalenses with an extended depth-of-field (EDOF) PSF and a depth-sensitive double-helix PSF (DH-PSF) were used, using the former metalens to reconstruct clear images of each depth and the latter to accurately estimate depth. However, due to these two metalenses being non-coaxial, parallax in capturing scenes is inevitable, which would limit the depth precision and field of view. In this work, a bifunctional reconfigurable metalens for 3D depth imaging was proposed by dynamically switching between EDOF-PSF and DH-PSF. Specifically, a polarization-independent metalens working at 1550 nm with a compact 1 mm2 aperture was realized, which can generate a focused accelerating beam and a focused rotating beam at the phase transition of crystalline and amorphous Ge2Sb2Te5 (GST), respectively. Combined with the deconvolution algorithm, we demonstrated the good capabilities of scene reconstruction and depth imaging using a theoretical simulation and achieved a depth measurement error of only 3.42%. Full article
(This article belongs to the Special Issue Tunable Nanophotonics and Reconfigurable Metadevices)
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9 pages, 1883 KiB  
Article
On-Chip Optical Beam Manipulation with an Electrically Tunable Lithium-Niobate-on-Insulator Metasurface
by Linyuan Dou, Lingyun Xie, Zeyong Wei, Zhanshan Wang and Xinbin Cheng
Micromachines 2022, 13(3), 472; https://0-doi-org.brum.beds.ac.uk/10.3390/mi13030472 - 19 Mar 2022
Cited by 3 | Viewed by 2926
Abstract
Photonic integrated circuits (PICs) have garnered increasing attention because of their high efficiency in information processing. Recently, lithium niobate on insulator (LNOI) has become a new platform for PICs with excellent properties. Several tunable devices such as on-chip tunable devices that utilize the [...] Read more.
Photonic integrated circuits (PICs) have garnered increasing attention because of their high efficiency in information processing. Recently, lithium niobate on insulator (LNOI) has become a new platform for PICs with excellent properties. Several tunable devices such as on-chip tunable devices that utilize the electric-optic effect of LN have been reported. However, an on-chip electrically tunable beam modulator that can focus or deflect the wave has not yet been developed. In this study, we designed an electrically tunable LNOI metasurface for on-chip optical beam manipulation. With a carefully designed local phase profile, we realized the tunable focusing and reflection functions on the chip. As the bias voltage varies, the focusing length can be shifted up to 19.9 μm (~13λ), whereas the focusing efficiency remains greater than 72%. A continuously tunable deflection can also be achieved efficiently within a range of 0–45°. The beam modulator enhances the ability to manipulate light on LNOI chips, which is expected to promote the development of integrated on-chip photonics. Full article
(This article belongs to the Special Issue Tunable Nanophotonics and Reconfigurable Metadevices)
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Review

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26 pages, 10368 KiB  
Review
Recent Advancement in Optical Metasurface: Fundament to Application
by Naqeeb Ullah, Ruizhe Zhao and Lingling Huang
Micromachines 2022, 13(7), 1025; https://0-doi-org.brum.beds.ac.uk/10.3390/mi13071025 - 28 Jun 2022
Cited by 12 | Viewed by 6284
Abstract
Metasurfaces have gained growing interest in recent years due to their simplicity in manufacturing and lower insertion losses. Meanwhile, they can provide unprecedented control over the spatial distribution of transmitted and reflected optical fields in a compact form. The metasurfaces are a kind [...] Read more.
Metasurfaces have gained growing interest in recent years due to their simplicity in manufacturing and lower insertion losses. Meanwhile, they can provide unprecedented control over the spatial distribution of transmitted and reflected optical fields in a compact form. The metasurfaces are a kind of planar array of resonant subwavelength components that, depending on the intended optical wavefronts to be sculpted, can be strictly periodic or quasi-periodic, or even aperiodic. For instance, gradient metasurfaces, a subtype of metasurfaces, are designed to exhibit spatially changing optical responses, which result in spatially varying amplitudes of scattered fields and the associated polarization of these fields. This paper starts off by presenting concepts of anomalous reflection and refraction, followed by a brief discussion on the Pancharatanm–Berry Phase (PB) and Huygens’ metasurfaces. As an introduction to wavefront manipulation, we next present their key applications. These include planar metalens, cascaded meta-systems, tunable metasurfaces, spectrometer retroreflectors, vortex beams, and holography. The review concludes with a summary, preceded by a perspective outlining our expectations for potential future research work and applications. Full article
(This article belongs to the Special Issue Tunable Nanophotonics and Reconfigurable Metadevices)
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