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Nanomaterials
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Optical Properties of Nanostructured Thin Films
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Optical Properties of Nanostructured Thin Films

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

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 2178

Special Issue Editor

Prof. Dr. Nam-Hoon Kim

E-Mail Website
Guest Editor
Department of Electrical Engineering, Chosun University, Gwangju 61452, Republic of Korea
Interests: semiconductor devices & process; thin films; electrical/optical properties
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue of Nanomaterials on “Optical properties of nanostructured thin films” will present the comprehensive research progress on the nanostructured thin films for optical applications. This covers the recent advancements in nanostructured thin films for utilizing optical properties including reflection, scattering, absorption, refraction, and plasmonic properties, as well as the unique optical properties discovered in the nanostructured thin films.  The Special Issue aims to attract both academic and industrial researchers in order to present current knowledge and novel ideas on nanostructured thin films for future applications and for the development of new technologies.

I invite authors to contribute their original research articles and review articles covering the significant progress of nanostructured optical thin films through the latest experimental and theoretical developments. Potential topics include, but are not limited to:

  • Fundamental studies and modeling of nanostructured thin films;
  • Nanostructured thin films for photonics, optoelectronics, photovoltaics, and plasmonics;
  • Challenging attempts to create nanostructured optical thin films for future devices;
  • Fabrication and characterization methods for nanostructured thin films;
  • Defects, fatigue, and reliability of the nanostructured thin films.

Prof. Dr. Nam-Hoon Kim
Guest Editor

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. Nanomaterials is an international peer-reviewed open access semimonthly 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 2900 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

  • optical properties
  • nanostructured
  • thin films
  • photonics
  • optoelectronics
  • photovoltaics
  • plasmonics
  • fabrication
  • characterization
  • defects

Published Papers (2 papers)

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Research

13 pages, 4356 KiB  
Article
Germanium-Based Optical Coatings for Aesthetic Enhancement with Low Radiofrequency Attenuation
by Enrique Carretero, Rocío Chueca and Rafael Alonso
Nanomaterials 2024, 14(6), 530; https://doi.org/10.3390/nano14060530 - 15 Mar 2024
Viewed by 673
Abstract
This work focused on developing optical coatings for decorative applications that remain transparent in the radiofrequency range. To achieve this, a combination of dielectric material (silicon-aluminum nitride, SiAlNx) and low-electrical-conductivity semiconductor material (germanium) was utilized. Germanium plays a crucial role in [...] Read more.
This work focused on developing optical coatings for decorative applications that remain transparent in the radiofrequency range. To achieve this, a combination of dielectric material (silicon-aluminum nitride, SiAlNx) and low-electrical-conductivity semiconductor material (germanium) was utilized. Germanium plays a crucial role in providing absorption in the visible spectrum, facilitating the design of coatings with various aesthetic appearances, while allowing for control over their transmittance. The optical properties of thin germanium layers were thoroughly characterized and leveraged to create multilayer designs with diverse aesthetic features. Different multilayer structures were designed, fabricated, and optically characterized, resulting in coatings with metallic gray, black, or various colors in reflection, while retaining the ability to transmit visible light for illumination and signaling applications. Finally, the radiofrequency attenuation of the developed coatings was measured, revealing negligible attenuation; this is in stark contrast to the metallic coatings used for decorative purposes, which can attenuate by up to 30 dB. Full article
(This article belongs to the Special Issue Optical Properties of Nanostructured Thin Films)
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13 pages, 6407 KiB  
Article
Polarization Splitting at Visible Wavelengths with the Rutile TiO2 Ridge Waveguide
by Xinzhi Zheng, Yujie Ma, Chenxi Zhao, Bingxi Xiang, Mingyang Yu, Yanmeng Dai, Fang Xu, Jinman Lv, Fei Lu, Cangtao Zhou and Shuangchen Ruan
Nanomaterials 2023, 13(12), 1891; https://doi.org/10.3390/nano13121891 - 20 Jun 2023
Cited by 2 | Viewed by 1116
Abstract
On-chip polarization control is in high demand for novel integrated photonic applications such as polarization division multiplexing and quantum communications. However, due to the sensitive scaling of the device dimension with wavelength and the visible-light absorption properties, traditional passive silicon photonic devices with [...] Read more.
On-chip polarization control is in high demand for novel integrated photonic applications such as polarization division multiplexing and quantum communications. However, due to the sensitive scaling of the device dimension with wavelength and the visible-light absorption properties, traditional passive silicon photonic devices with asymmetric waveguide structures cannot achieve polarization control at visible wavelengths. In this paper, a new polarization-splitting mechanism based on energy distributions of the fundamental polarized modes in the r-TiO2 ridge waveguide is investigated. The bending loss for different bending radii and the optical coupling properties of the fundamental modes in different r-TiO2 ridge waveguide configurations are analyzed. In particular, a polarization splitter with a high extinction ratio operating at visible wavelengths based on directional couplers (DCs) in the r-TiO2 ridge waveguide is proposed. Polarization-selective filters based on micro-ring resonators (MRRs) with resonances of only TE or TM polarizations are designed and operated. Our results show that polarization-splitters for visible wavelengths with a high extinction ratio in DC or MRR configurations can be achieved with a simple r-TiO2 ridge waveguide structure. Full article
(This article belongs to the Special Issue Optical Properties of Nanostructured Thin Films)
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