Large magnonic band gaps and defect modes in one-dimensional comblike structures

1999 ◽  
Vol 59 (13) ◽  
pp. 8709-8719 ◽  
Author(s):  
H. Al-Wahsh ◽  
A. Akjouj ◽  
B. Djafari-Rouhani ◽  
J. O. Vasseur ◽  
L. Dobrzynski ◽  
...  
Keyword(s):  
Band Gaps ◽  
Defect Modes ◽  
One Dimensional

Band gaps and nonlinear defect modes in one-dimensional photonic crystals with anisotropic single-negative metamaterials

2011 ◽  
Vol 43 (6) ◽  
pp. 1016-1019 ◽  
Author(s):  
Tingting Tang ◽  
Wenli Liu ◽  
Xiuying Gao ◽  
Xiujun He ◽  
Jun Yang
Keyword(s):  
Photonic Crystals ◽  
Band Gaps ◽  
Defect Modes ◽  
One Dimensional

Observation of large photonic band gaps and defect modes in one-dimensional networked waveguides

2003 ◽  
Vol 15 (10) ◽  
pp. 1593-1598 ◽  
Author(s):  
A Mir ◽  
A Akjouj ◽  
J O Vasseur ◽  
B Djafari-Rouhani ◽  
N Fettouhi ◽  
...  
Keyword(s):  
Band Gaps ◽  
Photonic Band Gaps ◽  
Defect Modes ◽  
One Dimensional ◽  
Photonic Band

scholarly journals Wave Propagation in an Optimized Tunable Multi-channel Flter based on One-dimensional Nano Superconductor Photonic Crystal

2021 ◽  
Author(s):  
Ali Baseri ◽  
Alireza Keshavarz
Keyword(s):  
Wave Propagation ◽  
Low Temperature ◽  
Defect Layer ◽  
Band Gaps ◽  
Defect Modes ◽  
One Dimensional ◽  
Lattice Constants ◽  
Space Industry ◽  
Polarized Waves ◽  
Central Defect

Abstract Although there has been a focus on THz lters so far, there is a signifcant defciency in advancing low-temperature THz lters. According to the needs, we proposed a tunable THz lter that selectively permits the desired incident frequencies to be propagated in relevance with our purpose. The presence of a low-temperature nano superconductor and an undoped semiconductor layers in the proposed structure resulted in a multi-channel THz lter, which could be highly tuned with several parameters such as lattice constants, applied temperature, etc. The achieved transmittance spectra revealed that the emerged transmittance couples and stacks follow exact regulations. Furthermore, the structure exhibited omnidirectional band-gaps for both TE and TM polarized waves. Moreover, the use of a central defect layer gave some transmittance defect modes in the forbidden areas. This structure could be used in some THz devices such as switches, optimized sensors as well as in space industry and telecommunications.

Band gaps and defect modes in periodically structured waveguides

2002 ◽  
Vol 112 (4) ◽  
pp. 1353-1358 ◽  
Author(s):  
J. N. Munday ◽  
C. Brad Bennett ◽  
W. M. Robertson
Keyword(s):  
Band Gaps ◽  
Defect Modes

Effect of Double Defects on Transmission Spectra of One-Dimensional Photonic Crystals

2010 ◽  
Vol 663-665 ◽  
pp. 725-728 ◽  
Author(s):  
Yuan Ming Huang ◽  
Qing Lan Ma ◽  
Bao Gai Zhai ◽  
Yun Gao Cai
Keyword(s):  
Photonic Crystals ◽  
Band Gap ◽  
Theoretical Calculations ◽  
Stop Band ◽  
Band Gaps ◽  
Characteristic Matrix ◽  
Frequency Range ◽  
Defect Band ◽  
One Dimensional ◽  
The One

Considered the model of the one-dimensional photonic crystals (1-D PCs) with double defects, the refractive indexes (n2’, n3’ and n2’’, n3’’) of the double defects were 2.0, 4.0 and 4.0, 2.0 respectively. With parameter n2=1.5, n3=2.5, by theoretical calculations with characteristic matrix method, the results shown that for a certain number (14 was taken) of layers of the 1-D PCs, when the double defects abutted, there was a defect band gap in the stop band gap, while when the double defects separated, there occurred two defect band gaps in the stop band gap; besides, with the separation of the two defects, the transmittance of the double defect band gaps decreased gradually. In addition, in this progress, the frequency range of the stop band gap has a little increase from 0.092 to 0.095.

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