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Applied Sciences
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Design and Applications of Plasmonic Materials
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Design and Applications of Plasmonic Materials

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Nanotechnology and Applied Nanosciences".

Deadline for manuscript submissions: closed (31 December 2020) | Viewed by 14553

Special Issue Editor

Dr. Maria Losurdo

E-Mail Website
Guest Editor
CNR-NANOTEC, Institute of Nanotechnology, National Council of Research, w/o Chemistry Department, University of Bari, 70126 Bari, Italy
Interests: nanotechnology; nanofabrication; materials; chemistry; surface science; condensed matter physics; optics; plasmonics; nano-photonics; optical spectroscopies; surface-enhanced Raman scattering (SERS) spectroscopy; optical sensing; biosensing

Special Issue Information

Dear Colleagues,

With the promise of enabling novel nanoscale phenomena exploiting strong and localized light–matter interactions, plasmonics is an expanding and attractive transdisciplinary field.

Various reasons for its scientific excitement arise from (i) extending into the Terahertz and the ultraviolet spectral region; (ii) research on a large variety of materials ranging from metals to semiconductors, dielectrics, nitrides, graphene, and to emerging 2D materials; (iii) the advanced fabrication of exotic nanostructure shapes; and (iv) the microspectroscopies of individual nanostructures. From a theoretical perspective, newfangled physics is suggested by different calculation methods, such as linear-response TDDFT, electromagnetic theory, and the quantization of plasmon excitation, expanding outlooks to plasmon multipoles, quantum nanophotonics with metamaterials, and entangled and squeezed plasmons.

Together, this work creates a diverse set of opportunities in nanophotonics, bio- and chemo-sensing, integrated optics, ultrafast switches, optoelectronics, quantum optics, solar energy, photocatalysis, and nanomedicine. Because of the complex entanglement of composition, nanostructure, geometry, and the resulting optical response, designing plasmonic systems is a challenge that demands intensive investigations.

This Special Issue aims to cross-fertilize the innovative developments in all of these aspects of plasmonics, so as to encourage a greater synergy in the research community.

Dr. Maria Losurdo
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. Applied Sciences 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 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

  • plasmonic materials
  • nanofabrication
  • optical properties
  • physics and modeling of plasmonic systems
  • metasurfaces
  • reconfigurable plasmonics
  • chiral plasmonics
  • magneto-plasmonics
  • plasmonic sensors
  • plasmonic devices

Published Papers (6 papers)

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Research

14 pages, 3736 KiB  
Article
Cellulose and Vanadium Plasmonic Sensor to Measure Ni2+ Ions
by Nur Alia Sheh Omar, Yap Wing Fen, Irmawati Ramli, Umi Zulaikha Mohd Azmi, Hazwani Suhaila Hashim, Jaafar Abdullah and Mohd Adzir Mahdi
Appl. Sci. 2021, 11(7), 2963; https://doi.org/10.3390/app11072963 - 26 Mar 2021
Cited by 6 | Viewed by 1573
Abstract
A novel vanadium–cellulose composite thin film-based on angular interrogation surface plasmon resonance (SPR) sensor for ppb-level detection of Ni(II) ion was developed. Experimental results show that the sensor has a linear response to the Ni(II) ion concentrations in the range of 2–50 ppb [...] Read more.
A novel vanadium–cellulose composite thin film-based on angular interrogation surface plasmon resonance (SPR) sensor for ppb-level detection of Ni(II) ion was developed. Experimental results show that the sensor has a linear response to the Ni(II) ion concentrations in the range of 2–50 ppb with a determination coefficient (R2) of 0.9910. This SPR sensor can attain a maximum sensitivity (0.068° ppb−1), binding affinity constant (1.819 × 106 M−1), detection accuracy (0.3034 degree−1), and signal-to-noise-ratio (0.0276) for Ni(II) ion detection. The optical properties of thin-film targeting Ni(II) ions in different concentrations were obtained by fitting the SPR reflectance curves using the WinSpall program. All in all, the proposed Au/MPA/V–CNCs–CTA thin-film-based surface plasmon resonance sensor exhibits better sensing performance than the previous film-based sensor and demonstrates a wide and promising technology candidate for environmental monitoring applications in the future. Full article
(This article belongs to the Special Issue Design and Applications of Plasmonic Materials)
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9 pages, 2641 KiB  
Article
Plasmonic Jackiw-Rebbi Modes in Graphene Waveguide Arrays
by Chunyan Xu, Pu Zhang, Dong Zhao, Huang Guo, Mingqiang Huang and Shaolin Ke
Appl. Sci. 2019, 9(19), 4152; https://doi.org/10.3390/app9194152 - 03 Oct 2019
Cited by 8 | Viewed by 2158
Abstract
We investigate the topological bound modes of surface plasmon polaritons (SPPs) in a graphene pair waveguide array. The arrays are with uniform inter-layer and intra-layer spacings but the chemical potential of two graphene in each pair are different. The topological bound modes emerge [...] Read more.
We investigate the topological bound modes of surface plasmon polaritons (SPPs) in a graphene pair waveguide array. The arrays are with uniform inter-layer and intra-layer spacings but the chemical potential of two graphene in each pair are different. The topological bound modes emerge when two arrays with opposite sequences of chemical potential are interfaced, which are analogous to Jackiw-Rebbi modes with opposite mass. We show the topological bound modes can be dynamically controlled by tuning the chemical potential, and the propagation loss of topological bound modes can be remarkably reduced by decreasing the chemical potential. Thanks to the strong confinement of graphene SPPs, the modal wavelength of topological bound modes can be squeezed as small as 1/70 of incident wavelength. The study provides a promising approach to realizing robust light transport beyond diffraction limit. Full article
(This article belongs to the Special Issue Design and Applications of Plasmonic Materials)
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10 pages, 2725 KiB  
Article
Understanding Electromagnetic Interactions and Electron Transfer in Ga Nanoparticle–Graphene–Metal Substrate Sandwich Systems
by Yael Gutiérrez, Maria M. Giangregorio, April S. Brown, Fernando Moreno and Maria Losurdo
Appl. Sci. 2019, 9(19), 4085; https://doi.org/10.3390/app9194085 - 30 Sep 2019
Cited by 5 | Viewed by 2419
Abstract
Plasmonic metal nanoparticle (NP)–graphene (G) systems are of great interest due their potential role in applications as surface-enhanced spectroscopies, enhanced photodetection, and photocatalysis. Most of these studies have been performed using noble metal NPs of silver and gold. However, recent studies have demonstrated [...] Read more.
Plasmonic metal nanoparticle (NP)–graphene (G) systems are of great interest due their potential role in applications as surface-enhanced spectroscopies, enhanced photodetection, and photocatalysis. Most of these studies have been performed using noble metal NPs of silver and gold. However, recent studies have demonstrated that the noble metal–graphene interaction leads to strong distortions of the graphene sheet. In order to overcome this issue, we propose the use of Ga NPs that, due to their weak interaction with graphene, do not produce any deformation of the graphene layers. Here, we analyze systems consisting of Ga NP/G/metal sandwich coupling structures, with the metal substrate being, specifically, copper (Cu) and nickel (Ni), i.e., Ga NP/G/Cu and Ga NPs/G/Ni. We experimentally show through real-time plasmonic spectroscopic ellipsometry and Raman spectroscopy measurements of the quenching of the Ga NP localized surface plasmon resonance (LSPR) depending on the wetting of the graphene by the Ga NPs and on the electron transfer through graphene. Theoretical finite-difference time-domain (FDTD) simulations supportively demonstrate that the LSPR in such sandwich structures strongly depends on the contact angle of the NP with graphene. Finally, we also provide evidence of the electron transfer from the Ga NPs into the graphene and into the metal substrate according to the work function alignments. These considerations about the contact angle and, consequently, geometry and wetting of the metal NPs on graphene, are useful to guide the design of those plasmonic systems to maximize electromagnetic enhancement. Full article
(This article belongs to the Special Issue Design and Applications of Plasmonic Materials)
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12 pages, 16792 KiB  
Article
The UV Plasmonic Behavior of Rhodium Tetrahedrons—A Numerical Analysis
by Yael Gutiérrez, Francisco González and Fernando Moreno
Appl. Sci. 2019, 9(19), 3947; https://doi.org/10.3390/app9193947 - 20 Sep 2019
Cited by 9 | Viewed by 2346
Abstract
Rhodium (Rh) nanoparticles have attracted a lot of attention due to their strong and ambient-stable UV plasmonic response. Very recently, the synthesis of Rh tetrahedra with and without concave defect-rich surfaces serving in plasmon assisted photocatalytic energy conversion has been reported. In this [...] Read more.
Rhodium (Rh) nanoparticles have attracted a lot of attention due to their strong and ambient-stable UV plasmonic response. Very recently, the synthesis of Rh tetrahedra with and without concave defect-rich surfaces serving in plasmon assisted photocatalytic energy conversion has been reported. In this work, we perform a systematic numerical study on plasmonic behavior and surface charge distribution in order to optimize the use of Rh tetrahedra in surface-enhanced spectroscopies and photocatalysis. We analyze the effect of the edges and corners reshaping, a deformation already reported to appear in Rh nanocubes which have been repeatedly re-used in photocatalytic processes. It is demonstrated that rounding the edges and corners weakens both the near-field enhancement and surface charge densities in these locations, which in turn are the more reactive regions due to the presence of uncoordinated sites. In addition, we study how the near-field and charge density is redistributed on the surface of the tetrahedra when concavities of different sizes and depths are introduced. Through this study, we show that, in order to simultaneously maximize the near-field enhancement and surface charge densities in the concavity and at external edges and corners, medium size deep concavities are needed. Full article
(This article belongs to the Special Issue Design and Applications of Plasmonic Materials)
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10 pages, 2733 KiB  
Article
Graphene-Coated Elliptical Nanowires for Low Loss Subwavelength Terahertz Transmission
by Da Teng, Kai Wang, Zhe Li, Yongzhe Zhao, Gao Zhao, Huiyong Li and Heng Wang
Appl. Sci. 2019, 9(11), 2351; https://doi.org/10.3390/app9112351 - 08 Jun 2019
Cited by 19 | Viewed by 2555
Abstract
Graphene has been recently proposed as a promising alternative to support surface plasmons with its superior performances in terahertz and mid-infrared range. Here, we propose a graphene-coated elliptical nanowire (GCENW) structure for subwavelength terahertz waveguiding. The mode properties and their dependence on frequency, [...] Read more.
Graphene has been recently proposed as a promising alternative to support surface plasmons with its superior performances in terahertz and mid-infrared range. Here, we propose a graphene-coated elliptical nanowire (GCENW) structure for subwavelength terahertz waveguiding. The mode properties and their dependence on frequency, nanowire size, permittivity and chemical potential of graphene are studied in detail by using a finite element method, they are also compared with the graphene-coated circular nanowires (GCCNWs). Results showed that the ratio of the long and short axes (b/a) of the elliptical nanowire had significant influence on mode properties, they also showed that a propagation length over 200 μm and a normalized mode area of approximately 10−4~10−3 could be obtained. Increasing b/a could simultaneously achieve both long propagation length and very small full width at half maximum (FWHM) of the focal spots. When b/a = 10, a pair of focal spots about 40 nm could be obtained. Results also showed that the GCENW had a better waveguiding performance when compared with the corresponding GCCNWs. The manipulation of Terahertz (THz) waves at a subwavelength scale using graphene plasmon (GP) may lead to applications in tunable THz components, imaging, and nanophotonics. Full article
(This article belongs to the Special Issue Design and Applications of Plasmonic Materials)
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9 pages, 2366 KiB  
Article
Refractive Index Sensing of Monolayer Molecules Using Both Local and Propagating Surface Plasmons in Mid-Infrared Metagrating
by De He, Tieyan Zhang, Lu Liu, Shixing Guo and Zhijun Liu
Appl. Sci. 2019, 9(8), 1524; https://doi.org/10.3390/app9081524 - 12 Apr 2019
Cited by 3 | Viewed by 2996
Abstract
Surface-enhanced infrared absorption spectroscopy (SEIRA) is attractive for molecular sensing due to its high sensitivity and access to molecular fingerprint absorptions. In this paper, we report on refractive index sensing of monolayer molecules in a spectral band outside the molecular fingerprint region. In [...] Read more.
Surface-enhanced infrared absorption spectroscopy (SEIRA) is attractive for molecular sensing due to its high sensitivity and access to molecular fingerprint absorptions. In this paper, we report on refractive index sensing of monolayer molecules in a spectral band outside the molecular fingerprint region. In a metagrating composed of a three-layer metal-insulator-metal structure, both propagating surface plasmon resonances (PSPs) and local surface plasmon resonances (LSPRs) are exited from free-space in a broad band of 3 to 9 µm, and their sensing properties are characterized. In response to a self-assembled monolayer of octadecanethiol (ODT) molecules, both PSPs and LSPRs exhibit redshifts in wavelength. The shifts of LSPRs are larger than those of PSPs, as originated from their stronger spatial confinement and larger field enhancement. Our proposed mid-infrared molecular sensor is immune to frequency variations of plasmon resonance and more tolerant to sample feature size variation. Full article
(This article belongs to the Special Issue Design and Applications of Plasmonic Materials)
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