Special Issue "Sub-wavelength Optics"

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

Deadline for manuscript submissions: 28 February 2019

Special Issue Editor

Guest Editor
Prof. Fadi Baida

Département d'Optique P.M. Duffieux, Universite Bourgogne Franche-Comte, Besancon, France
Website | E-Mail
Interests: nano-optics; plasmonics; photonic crystal; metamaterials; optical nanotweezers; electromagnetic theory

Special Issue Information

Dear Colleagues,

Following the growing developments of nanotechnology, nano-structure manufacturing processes have multiplied and led to the miniaturization of high-performance optical components. These components are not limited to usual functions, such as bulk devices, but claim exotic behaviors never highlighted in conventional optics. In this context, sub-wavelength optics has become a key element in the understanding and design of such components. The light-matter interactions at this scale can lead to nanometric confinement of electromagnetic energy, thus modifying the intrinsic properties of materials. This Special Issue on “Sub-Wavelength Optics” provides an overview of recent advances in this field through invited papers covering all areas ranging from fundamental theoretical principles to applications in different domains (light harvesting, nano-tweezers, E- and H-field sensors, modulators, quantum-emitters, etc.).

Prof. Fadi Baida
Guest Editor

Manuscript Submission Information

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Keywords

  • Near-field optics (theory and modeling)
  • Light-matter interaction (linear and non-linear)
  • Plasmonics
  • Metasurfaces
  • Photonic crystals
  • Nano-device coupling
  • Nano-sensors
  • TeraHertz and microwave nanophotonics
  • Nano-spectroscopy (SERS, fluorescence, etc.)
  • Optical forces (Nano-tweezers)
  • Quantum optics

Published Papers (3 papers)

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Research

Open AccessArticle Quantification of the Transmission Properties of Anisotropic Metasurfaces Illuminated by Finite-Size Beams
Appl. Sci. 2018, 8(10), 2001; https://doi.org/10.3390/app8102001
Received: 4 September 2018 / Revised: 30 September 2018 / Accepted: 18 October 2018 / Published: 22 October 2018
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Abstract
The aim of this paper is to present an analytical method to quantitatively address the influence of a focusing illumination on the optical response properties of a metasurface illuminated by a finite-size beam. Most theoretical and numerical studies are performed by considering an
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The aim of this paper is to present an analytical method to quantitatively address the influence of a focusing illumination on the optical response properties of a metasurface illuminated by a finite-size beam. Most theoretical and numerical studies are performed by considering an infinite periodic structure illuminated by a plane wave. In practice, one deals with a finite-size illumination and structure. The combination of the angular spectrum expansion with a monomodal modal method is used to determine the beam size needed to acquire efficient properties of a metasurface that behaves as an anisotropic plate. Interesting results show that the beam-size can be as small as 5 × 5 periods to recover the results of a plane wave. Other results also show that the beam-size can be used as an extrinsic parameter to enhance the anisotropic metasurface performance and to adjust its expected properties finely (birefringence and/or transmission coefficient). These findings are important for the design of real (finite) structures and can be adapted for experimental conditions to achieve optimized results and take full advantage of the metamaterial properties. Full article
(This article belongs to the Special Issue Sub-wavelength Optics)
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Open AccessArticle Implementation of Backward Surface Waves by Multilayered Metal-Dielectric Metamaterials Partnering with Conventional Dielectric Media
Appl. Sci. 2018, 8(9), 1420; https://doi.org/10.3390/app8091420
Received: 31 July 2018 / Revised: 14 August 2018 / Accepted: 16 August 2018 / Published: 21 August 2018
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Abstract
It has been reported that backward surface waves of Tamm state can be supported by a multilayered metal–dielectric metamaterial with different partner materials, such as left-handed metamaterial or dissimilar metallic–dielectric metamaterial. In this paper, the transfer-matrix method is employed to reveal that transverse-magnetic
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It has been reported that backward surface waves of Tamm state can be supported by a multilayered metal–dielectric metamaterial with different partner materials, such as left-handed metamaterial or dissimilar metallic–dielectric metamaterial. In this paper, the transfer-matrix method is employed to reveal that transverse-magnetic (TM)-polarized backward surface waves can be realized by a multilayered metal–dielectric metamaterial in contact with a conventional homogenous dielectric medium. Owing to the strong optical nonlocality, the existence of such backward surface waves is proved to be dependent on the order of the metallic/dielectric layers. The relevant anomalous dispersion relations can also be dramatically engineered by varying the unit-cell thickness and the filling factor. Additionally, the distribution of the energy flow is presented to further unfold the physical mechanism of the backward surface waves. Finally, a numerical simulation of backward surface wave excited by a TM-polarized Gaussian beam based on a prism-coupled configuration is displayed. Full article
(This article belongs to the Special Issue Sub-wavelength Optics)
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Graphical abstract

Open AccessArticle Broadband Electromagnetic Dipole Resonance by the Coupling Effect of Multiple Dielectric Nanocylinders
Appl. Sci. 2018, 8(1), 60; https://doi.org/10.3390/app8010060
Received: 30 November 2017 / Revised: 26 December 2017 / Accepted: 27 December 2017 / Published: 3 January 2018
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Abstract
Broadband resonant scattering in a visible region that can be obtained by coupled multiple silicon nanocylinders. For a single high refractive index silicon nanocylinder, the electric dipole and magnetic dipole resonances can be observed. By constructing a silicon nanocylinder dimer, the interaction between
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Broadband resonant scattering in a visible region that can be obtained by coupled multiple silicon nanocylinders. For a single high refractive index silicon nanocylinder, the electric dipole and magnetic dipole resonances can be observed. By constructing a silicon nanocylinder dimer, the interaction between the particles plays an important role in broadband scattering. Interestingly, due to magnetic-magnetic dipole interaction, a splitting phenomenon of magnetic resonance mode is revealed. A new magnetic resonant mode emerges at a longer wavelength in dimer and trimer by changing the diameter of one nanocylinder in dimer or trimer, and the gap size between nanocylinders. The scattering bandwidth can further increase with the effect of substrate, which is attributed to the extension of resonant mode into substrate. The broadband optical response can be revealed by the calculated scattering resonant spectra and the spatial electromagnetic field distributions. Furthermore, the transmission of periodic nanocylinder structure, including single nanocylinder and dimer, is demonstrated. By decreasing the gap between nanocylinders in dimer for periodic array structure, a new electric resonant mode occurs. These results can provide a guideline to realize broadband resonant optical elements. Full article
(This article belongs to the Special Issue Sub-wavelength Optics)
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Figure 1

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