Strong near-field couplings of anapole modes and the formation of higher-order electromagnetic modes in stacked all-dielectric nanodisks

2021 ◽  
Author(s):  
Bin Liu ◽  
Ma-Long Hu ◽  
Yi-Wen Zhang ◽  
Yue You ◽  
Zhao-Guo Liang ◽  
...  
Keyword(s):  
Electric Dipole ◽  
Near Field ◽  
Higher Order ◽  
Dipole Mode ◽  
Order Mode ◽  
Quadrupole Mode ◽  
Higher Order Modes ◽  
Scattering Spectrum ◽  
Magnetic Dipole Resonances ◽  
Higher Order Mode

Abstract We theoretically study the near-field couplings of two stacked all-dielectric nanodisks, where each disk has an electric anapole mode consisting of an electric dipole mode and an electric toroidal dipole (ETD) mode. Strong bonding and anti-bonding hybridizations of the ETD modes of the two disks can occur. The bonding-hybridized ETD can interfere with the dimer's electric dipole mode and induce a new electric anapole mode. The anti-bonding hybridization of the ETD modes can induce a magnetic toroidal dipole (MTD) response in the disk dimer. The MTD and magnetic dipole resonances of the dimer form a magnetic anapole mode. Thus, two dips associated with the hybridized modes appear on the scattering spectrum of the dimer. Furthermore, the MTD mode is also accompanied by an electric toroidal quadrupole mode. The hybridizations of the ETD and the induced higher-order modes can be adjusted by varying the geometries of the disks. The strong anapole mode couplings and the corresponding rich higher-order mode responses in simple all-dielectric nanostructures can provide new opportunities for nanoscale optical manipulations.

Near-Field Pattern of Large Aperture Higher Order Mode Generator Using Backpropagated Fields in Free Space

2014 ◽  
Vol 42 (4) ◽  
pp. 937-943 ◽  
Author(s):  
Kwanghoon Kim ◽  
Mun Seok Choe ◽  
Woosang Lee ◽  
Joonho So ◽  
Eunmi Choi
Keyword(s):  
Free Space ◽  
Near Field ◽  
Higher Order ◽  
Field Pattern ◽  
Order Mode ◽  
Large Aperture ◽  
Higher Order Mode

The Mixed Method Analysis of Higher Order Mode in Waveguide of Piecewise Homogeneous Dielectric

2011 ◽  
Vol 130-134 ◽  
pp. 3334-3337
Author(s):  
Chun Jiang Shuai
Keyword(s):  
Mixed Method ◽  
Higher Order ◽  
Order Mode ◽  
Tem Cell ◽  
Higher Order Modes ◽  
Calculation Results ◽  
Elementary Principle ◽  
Method Analysis ◽  
General Computer Program ◽  
Higher Order Mode

This paper presented the elementary principle and the computation for waveguide eigenvalues by using mixed method (Quadric-FE-BEM). A general computer program based on the mixed method is programed, as an application, the cut–off wavelength of higher order modes in the rectangular waveguide are computed and the calculation results are well in agreement with the theoretical value. It has been shown that the mixed method is an effective method to analyze waveguide eigenvalues in engineering. At last, the cut-off wavelength of higher order modes in TEM Cell of homogeneous dielectric is also analyzed.

Higher Order Modes as Accuracy Limiting Factor in Permittivity Measurements of High Lossy Fluids Using Transmission Techniques in the GHz Range

1989 ◽  
Vol 44 (1) ◽  
pp. 75-80 ◽  
Author(s):  
A. Redhardt ◽  
H.-J. Steinhoff ◽  
J. Schütter ◽  
H.-J. Neumann ◽  
G. Hess
Keyword(s):  
Higher Order ◽  
Dielectric Constants ◽  
Limiting Factor ◽  
Order Mode ◽  
High Permittivity ◽  
Simulation Procedure ◽  
Higher Order Modes ◽  
Permittivity Measurements ◽  
Higher Order Mode

Abstract The higher order mode distortion in measuring dielectric constants on high lossy, high permittivity liquids in the GHz range is investigated by a simulation procedure as well as by experiment. For this, a homodyne method for measuring ε* is introduced in analogy to precision EPR-work.

scholarly journals Enhanced Gain Microstrip Patches Operating on Higher Order Modes

2007 ◽  
Vol 2007 ◽  
pp. 1-5
Author(s):  
Milan Polivka ◽  
Alois Holub
Keyword(s):  
Current Distribution ◽  
Source Area ◽  
Higher Order ◽  
Order Mode ◽  
Phase Current ◽  
Gain Enhancement ◽  
Higher Order Modes ◽  
Patch Topology ◽  
Higher Order Mode

Novel topologies of rectangular microstrip patches providing broadside radiated one point fed radiators with enhanced gain are compared. The principle of the gain enhancement is based on an extension of a source area. Dominant in-phase current distribution on the patch is maintained by using higher order mode and geometrical modification of the patch topology. That is achieved by introducing suitable perturbation elements in the shape of slots and notches. Two principal patch topologies operating on TM21 and TM03 modes are described. A comparison of simulated and measured properties of realized prototypes at 10 GHz band are presented. The results show that gain 12.3 dBi of single patch can be reached.

Perforated Dielectric Resonator Antenna Operating on Higher Order Mode

2018 ◽  
Author(s):  
Irfan Ali ◽  
Mohd Haizal Jamaluddin ◽  
Muhammad Ramlee Kamarudin ◽  
Abinash Gaya ◽  
S Raghuraman ◽  
...  
Keyword(s):  
Dielectric Resonator ◽  
Higher Order ◽  
Dielectric Resonator Antenna ◽  
Order Mode ◽  
Higher Order Mode
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