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Micromachines
Special Issues
Nanostructured Optoelectronic and Nanophotonic Devices
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Nanostructured Optoelectronic and Nanophotonic Devices

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

Deadline for manuscript submissions: 30 November 2025 | Viewed by 1370

Special Issue Editors

Dr. Arun Kumar

E-Mail Website
Guest Editor
SIMAU, Faculty of Engineering, Polytechnic University of Marche, 60121 Ancona, AN, Italy
Interests: optoelectronics; nanoelectronics; semiconductor; light–matter interaction
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Antonio Di Bartolomeo

E-Mail Website
Guest Editor
Department of Physics “E.R. Caianiello”, University of Salerno, 84084 Fisciano, Italy
Interests: optical and electrical properties of nanostructured materials such as carbon nanotubes, graphene, and 2D materials; van der Waals heterostructures and Schottky junctions; field-effect transistors; non-volatile memories; solar cells; photodetectors; field emission devices
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The advancement of nanostructured materials development and the understanding of inclusive photo-physical phenomena have significantly contributed to the advancement of the optoelectronic field. Furthermore, integrating nanomaterials with photonics has paved the way for developing highly efficient nanophotonic devices, which leads to improved interactions between light and matter.

This Special Issue, “Nanostructured Optoelectronic and Nanophotonic Devices”, invites the authors to submit the recent results as original communications, articles, and reviews.

Dr. Arun Kumar
Prof. Dr. Antonio Di Bartolomeo
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 2100 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

  • nanomaterials
  • broadband detection
  • photodetectors
  • quantum dots
  • light–matter interaction
  • solar cells
  • nanophotonic devices

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

Published Papers (2 papers)

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Research

18 pages, 8684 KiB  
Article
Harnessing Nanoplasmonics: Design Optimization for Enhanced Optoelectronic Performance in Nanocrystalline Silicon Devices
by Mohsen Mahmoudysepehr and Siva Sivoththaman
Micromachines 2025, 16(5), 540; https://doi.org/10.3390/mi16050540 - 30 Apr 2025
Viewed by 202
Abstract
Nanoplasmonic structures have emerged as a promising approach to address light trapping limitations in thin-film optoelectronic devices. This study investigates the integration of metallic nanoparticle arrays onto nanocrystalline silicon (nc-Si:H) thin films to enhance optical absorption through plasmonic effects. Using finite-difference time-domain (FDTD) [...] Read more.
Nanoplasmonic structures have emerged as a promising approach to address light trapping limitations in thin-film optoelectronic devices. This study investigates the integration of metallic nanoparticle arrays onto nanocrystalline silicon (nc-Si:H) thin films to enhance optical absorption through plasmonic effects. Using finite-difference time-domain (FDTD) simulations, we systematically optimize key design parameters, including nanoparticle geometry, spacing, metal type (Ag and Al), dielectric spacer material, and absorber layer thickness. The results show that localized surface plasmon resonances (LSPRs) significantly amplify near-field intensities, improve forward scattering, and facilitate coupling into waveguide modes within the active layer. These effects lead to a measurable increase in integrated quantum efficiency, with absorption improvements reaching up to 30% compared to bare nc-Si:H films. The findings establish a reliable design framework for engineering nanoplasmonic architectures that can be applied to enhance performance in photovoltaic devices, photodetectors, and other optoelectronic systems. Full article
(This article belongs to the Special Issue Nanostructured Optoelectronic and Nanophotonic Devices)
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10 pages, 3918 KiB  
Article
Design and Fabrication of Ultrathin Metallic Phase Shifters for Visible and Near-Infrared Wavelengths
by Qing Guo, Jinkui Chu, Chuanlong Guan, Chuxiao Zhang and Ran Zhang
Micromachines 2025, 16(1), 74; https://doi.org/10.3390/mi16010074 - 10 Jan 2025
Viewed by 834
Abstract
The polarization state of light is critical for biological imaging, acousto-optics, bio-navigation, and many other optical applications. Phase shifters are extensively researched for their applications in optics. The size of optical elements with phase delay that are made from natural birefringent materials is [...] Read more.
The polarization state of light is critical for biological imaging, acousto-optics, bio-navigation, and many other optical applications. Phase shifters are extensively researched for their applications in optics. The size of optical elements with phase delay that are made from natural birefringent materials is limited; however, fabricating waveplates from dielectric metamaterials is very complex and expensive. Here, we present an ultrathin (14 nm) metallic phase shifter developed using nanoimprinting technology and the oxygen plasma ashing technique for visible and near-infrared wavelengths. The fabrication process can produce desirable metallic phase shifters with high efficiency, large area, and low cost. We demonstrate through a numerical simulation and experiment that the metallic phase shifter exhibits phase delay performance. Our results highlight the simplicity of the fabrication process for a metallic phase shifter with phase delay performance and offer important opportunities for creating high-efficiency, ultrathin polarizing elements, which can be used in miniaturized devices, such as integrated circuits. Full article
(This article belongs to the Special Issue Nanostructured Optoelectronic and Nanophotonic Devices)
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