Investigation of vortex evanescent fields in the near zone of fiber taper and sub-wavelength diffractive axicon

2018 ◽  
Author(s):  
Dmitry A. Savelyev ◽  
Sergey Degtyarev
Keyword(s):  
Fiber Taper ◽  
Near Zone ◽  
Evanescent Fields ◽  
Diffractive Axicon ◽  
Sub Wavelength

Calculation of Near Zone Electromagnetic Field Radiated from Sub-Wavelength Nanoaperture to a Plane Dielectric

2019 ◽  
Vol 18 (03n04) ◽  
pp. 1940024
Author(s):  
V. M. Serdyuk ◽  
J. A. Titovitsky ◽  
S. V. Von Gratovski ◽  
V. V. Koledov
Keyword(s):  
Diffraction Problem ◽  
Finite Thickness ◽  
Diffraction Theory ◽  
Local Energy ◽  
Rigorous Solution ◽  
Near Zone ◽  
Conducting Screen ◽  
Electromagnetic Transmission ◽  
Plane Wave Diffraction ◽  
Sub Wavelength

The theoretical model of electromagnetic transmission through solitary sub-wavelength nanoapertures is considered. The model is based on a rigorous solution of the plane wave diffraction problem by a slot in the perfectly conducting screen of a finite thickness. The local energy of the electric field inside the plane dielectrics arranged behind the screen is used for calculations. The results demonstrate the principal features of the phenomenon that confirms that the diffraction theory can be applied successfully without the concept of surface plasmons.

scholarly journals Near-field plates and the near zone of metasurfaces

Nanophotonics ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 679-684
Author(s):  
Roberto Merlin
Keyword(s):  
Electromagnetic Field ◽  
Near Field ◽  
Interface Problems ◽  
Field Patterns ◽  
Dependent Behavior ◽  
Near Zone ◽  
Universal Properties ◽  
Sub Wavelength

AbstractA brief, tutorial account is given of the differences between the near and far regions of the electromagnetic field emphasizing the source-dependent behavior of the former and the universal properties of the latter. Field patterns of near-field plates, that is, metasurfaces used for sub-wavelength applications, are discussed in some detail. Examples are given of fields that decay away from the plates in an exponential manner, a ubiquitous feature of many interface problems, and metasurfaces for which the decay is not exponential, but algebraic. It is also shown that a properly designed system of two parallel near-field plates can produce fields that exhibit pseudo minima, which are potentially useful for near-field tweezer-like applications.

Mathematical Simulation of the Bearing Process in the Near Zone of a Complex Extended Object

2004 ◽  
Vol 61 (2) ◽  
pp. 141-149
Author(s):  
N. V. Barkhudaryan ◽  
S. E. Vazhinsky ◽  
V. A. Vasilets ◽  
A. Z. Sazonov ◽  
O. I. Sukharevsky
Keyword(s):  
Mathematical Simulation ◽  
Extended Object ◽  
Near Zone

Canalization of Sub-wavelength Images by Electromagnetic Crystals

PIERS Online ◽  
2005 ◽  
Vol 1 (1) ◽  
pp. 37-41 ◽  
Author(s):  
Pavel A. Belov ◽  
C. R. Simovski
Keyword(s):  
Electromagnetic Crystals ◽  
Sub Wavelength

scholarly journals Observing and controlling a Tamm plasmon at the interface with a metasurface

Nanophotonics ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 897-903 ◽  
Author(s):  
Oleksandr Buchnev ◽  
Alexandr Belosludtsev ◽  
Victor Reshetnyak ◽  
Dean R. Evans ◽  
Vassili A. Fedotov
Keyword(s):  
Liquid Crystal ◽  
Metal Film ◽  
Near Infrared ◽  
Thin Metal Film ◽  
Outer Side ◽  
Spectral Position ◽  
External Perturbations ◽  
Dielectric Mirror ◽  
Wavelength Scale ◽  
Sub Wavelength

AbstractWe demonstrate experimentally that Tamm plasmons in the near infrared can be supported by a dielectric mirror interfaced with a metasurface, a discontinuous thin metal film periodically patterned on the sub-wavelength scale. More crucially, not only do Tamm plasmons survive the nanopatterning of the metal film but they also become sensitive to external perturbations as a result. In particular, by depositing a nematic liquid crystal on the outer side of the metasurface, we were able to red shift the spectral position of Tamm plasmon by 35 nm, while electrical switching of the liquid crystal enabled us to tune the wavelength of this notoriously inert excitation within a 10-nm range.

Topological interface states in translational metamaterials for sub-wavelength in-plane waves

2021 ◽  
Vol 197 ◽  
pp. 106308
Author(s):  
Yijie Liu ◽  
Liang Jin ◽  
Hongfa Wang ◽  
Dongying Liu ◽  
Yingjing Liang
Keyword(s):  
Plane Waves ◽  
Interface States ◽  
Sub Wavelength

scholarly journals Ultra-high-Q resonances in plasmonic metasurfaces

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
M. Saad Bin-Alam ◽  
Orad Reshef ◽  
Yaryna Mamchur ◽  
M. Zahirul Alam ◽  
Graham Carlow ◽  
...  
Keyword(s):  
Incident Light ◽  
Reducing Power ◽  
Field Enhancement ◽  
Plasmonic Nanostructures ◽  
High Q ◽  
Alternative Material ◽  
Order Of Magnitude ◽  
Wavelength Scale ◽  
Strong Confinement ◽  
Sub Wavelength

AbstractPlasmonic nanostructures hold promise for the realization of ultra-thin sub-wavelength devices, reducing power operating thresholds and enabling nonlinear optical functionality in metasurfaces. However, this promise is substantially undercut by absorption introduced by resistive losses, causing the metasurface community to turn away from plasmonics in favour of alternative material platforms (e.g., dielectrics) that provide weaker field enhancement, but more tolerable losses. Here, we report a plasmonic metasurface with a quality-factor (Q-factor) of 2340 in the telecommunication C band by exploiting surface lattice resonances (SLRs), exceeding the record by an order of magnitude. Additionally, we show that SLRs retain many of the same benefits as localized plasmonic resonances, such as field enhancement and strong confinement of light along the metal surface. Our results demonstrate that SLRs provide an exciting and unexplored method to tailor incident light fields, and could pave the way to flexible wavelength-scale devices for any optical resonating application.

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