Analysis and applications of one-dimensional periodic dielectric gratings under plane wave excitation

2004 ◽  
Author(s):  
A. Coves ◽  
A. A. San Blas ◽  
B. Gimeno ◽  
Miguel V. Andres ◽  
Vincente E. Boria ◽  
...  
Keyword(s):  
Plane Wave ◽  
Wave Excitation ◽  
One Dimensional ◽  
Dielectric Gratings

Three-dimensional scattering of dielectric gratings under plane-wave excitation

2003 ◽  
Vol 2 ◽  
pp. 215-218 ◽  
Author(s):  
A. Coves ◽  
B. Gimeno ◽  
A.A.S. Blas ◽  
A. Vidal ◽  
V.E. Boria ◽  
...  
Keyword(s):  
Plane Wave ◽  
Three Dimensional ◽  
Wave Excitation ◽  
Dielectric Gratings

scholarly journals FERROELECTRIC LIQUID CRYSTALS: FROM THE PLANE WAVE TO THE MULTISOLITON LIMIT

1995 ◽  
Vol 09 (18n19) ◽  
pp. 2321-2362 ◽  
Author(s):  
I. MUŠEVIČ ◽  
B. ŽEKŠ ◽  
R. BLINC ◽  
TH. RASING
Keyword(s):  
Plane Wave ◽  
Domain Walls ◽  
Soft Mode ◽  
Dynamic Properties ◽  
Band Gaps ◽  
Collective Excitations ◽  
Ferroelectric Liquid Crystals ◽  
One Dimensional ◽  
Photonic Band ◽  
Reentrant Phases

In the presence of external fields or in restricted geometries, the originally continuous helical symmetry of the Sm C* phase is broken by the appearence of field- or geometry-induced soliton-like domain walls. As a result of this symmetry breaking, a crossover between the plane-wave-like and soliton-like regime occurs in both static and dynamic properties which is responsible for some remarkable phenomena such as field-induced optical biaxiality or a field-induced band structure of collective excitations. Whereas we find in the plane-wave-like regime a degenerate soft mode which splits below the Sm A→Sm C* transition into a symmetry recovering Goldstone-phason-mode and an amplitudon mode, we find in the soliton regime a splitting of the phason mode into acoustic and optic-like branches separated by a band gap. Within the same framework we also discuss other remarkable and extraordinary properties such as reentrant phases, Lifshitz points, one dimensional photonic band gaps and thickness dependent phase diagrams.

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