scholarly journals Magnetic control of transverse electric polarization in BiFeO3

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
M. Tokunaga ◽  
M. Akaki ◽  
T. Ito ◽  
S. Miyahara ◽  
A. Miyake ◽  
...  
Keyword(s):  
Transverse Electric ◽  
Electric Polarization ◽  
Magnetic Control

Magnetic control of electric polarization in the noncentrosymmetric compound (Cu,Ni)B2O4

2013 ◽  
Vol 87 (18) ◽  
Author(s):  
N. D. Khanh ◽  
N. Abe ◽  
K. Kubo ◽  
M. Akaki ◽  
M. Tokunaga ◽  
...  
Keyword(s):  
Electric Polarization ◽  
Magnetic Control

scholarly journals Rapidly convergent quasi-periodic Green functions for scattering by arrays of cylinders—including Wood anomalies

2017 ◽  
Vol 473 (2199) ◽  
pp. 20160802 ◽  
Author(s):  
Oscar P. Bruno ◽  
Agustin G. Fernandez-Lado
Keyword(s):  
Green Function ◽  
Transverse Electric ◽  
Resonance Region ◽  
Transverse Magnetic ◽  
Electric Polarization ◽  
Arbitrary Cross Section ◽  
Full Spectrum ◽  
Recent Contribution ◽  
Periodic Arrays ◽  
Wood Anomaly

This paper presents a full-spectrum Green-function methodology (which is valid, in particular, at and around Wood-anomaly frequencies) for evaluation of scattering by periodic arrays of cylinders of arbitrary cross section—with application to wire gratings, particle arrays and reflectarrays and, indeed, general arrays of conducting or dielectric bounded obstacles under both transverse electric and transverse magnetic polarized illumination. The proposed method, which, for definiteness, is demonstrated here for arrays of perfectly conducting particles under transverse electric polarization, is based on the use of the shifted Green-function method introduced in a recent contribution (Bruno & Delourme 2014 J. Computat. Phys. 262 , 262–290 ( doi:10.1016/j.jcp.2013.12.047 )). A certain infinite term arises at Wood anomalies for the cylinder-array problems considered here that is not present in the previous rough-surface case. As shown in this paper, these infinite terms can be treated via an application of ideas related to the Woodbury–Sherman–Morrison formulae. The resulting approach, which is applicable to general arrays of obstacles even at and around Wood-anomaly frequencies, exhibits fast convergence and high accuracies. For example, a few hundreds of milliseconds suffice for the proposed approach to evaluate solutions throughout the resonance region (wavelengths comparable to the period and cylinder sizes) with full single-precision accuracy.

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