scholarly journals Quasinormal-Mode Expansion of the Scattering Matrix

2017 ◽  
Vol 7 (2) ◽  
Author(s):  
Filippo Alpeggiani ◽  
Nikhil Parappurath ◽  
Ewold Verhagen ◽  
L. Kuipers
Keyword(s):  
Scattering Matrix ◽  
Quasinormal Mode ◽  
Mode Expansion

scholarly journals Planar ESPAR Array Design with Nonsymmetrical Pattern by Means of Finite-Element Method, Domain Decomposition, and Spherical Wave Expansion

2012 ◽  
Vol 2012 ◽  
pp. 1-8
Author(s):  
Jesús García ◽  
Juan F. Izquierdo ◽  
Jesús Rubio ◽  
Miguel A. González ◽  
Juan Zapata
Keyword(s):  
Finite Element ◽  
Domain Decomposition ◽  
Mutual Coupling ◽  
Ground Plane ◽  
Spherical Wave ◽  
Scattering Matrix ◽  
Mode Expansion ◽  
Spherical Waves ◽  
Spherical Wave Expansion ◽  
Generalized Scattering Matrix

The application of a 3D domain decomposition finite-element and spherical mode expansion for the design of planar ESPAR (electronically steerable passive array radiator) made with probe-fed circular microstrip patches is presented in this work. A global generalized scattering matrix (GSM) in terms of spherical modes is obtained analytically from the GSM of the isolated patches by using rotation and translation properties of spherical waves. The whole behaviour of the array is characterized including all the mutual coupling effects between its elements. This procedure has been firstly validated by analyzing an array of monopoles on a ground plane, and then it has been applied to synthesize a prescribed radiation pattern optimizing the reactive loads connected to the feeding ports of the array of circular patches by means of a genetic algorithm.

scholarly journals Quasinormal Mode Expansion for Linearized Waves in Gravitational Systems

1995 ◽  
Vol 74 (23) ◽  
pp. 4588-4591 ◽  
Author(s):  
E. S. C. Ching ◽  
P. T. Leung ◽  
W. M. Suen ◽  
K. Young
Keyword(s):  
Quasinormal Mode ◽  
Mode Expansion ◽  
Gravitational Systems

scholarly journals Quasinormal mode expansion of optical far-field quantities

2020 ◽  
Vol 102 (3) ◽  
Author(s):  
Felix Binkowski ◽  
Fridtjof Betz ◽  
Rémi Colom ◽  
Martin Hammerschmidt ◽  
Lin Zschiedrich ◽  
...  
Keyword(s):  
Quasinormal Mode ◽  
Far Field ◽  
Mode Expansion

Quasinormal-mode expansion for waves in open systems

1998 ◽  
Vol 70 (4) ◽  
pp. 1545-1554 ◽  
Author(s):  
E. S. C. Ching ◽  
P. T. Leung ◽  
A. Maassen van den Brink ◽  
W. M. Suen ◽  
S. S. Tong ◽  
...  
Keyword(s):  
Open Systems ◽  
Quasinormal Mode ◽  
Mode Expansion

Quasinormal mode expansion and late-time behavior of leaking systems

1991 ◽  
Vol 43 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Wai-Mo Suen ◽  
Kenneth Young
Keyword(s):  
Quasinormal Mode ◽  
Late Time ◽  
Time Behavior ◽  
Mode Expansion

“Preparation of Single Crystalline Gold Films for ED Studies”

1972 ◽  
Vol 30 ◽  
pp. 634-635
Author(s):  
Joseph D. C. Peng
Keyword(s):  
Crystal Morphology ◽  
Diffraction Theory ◽  
Scattering Matrix ◽  
Vacuum Evaporation ◽  
Gold Films ◽  
Matrix Formulation ◽  
Silver Films ◽  
Single Crystalline ◽  
Grating Pattern ◽  
Stacking Disorder

The relative intensities of the ED spots in a cross-grating pattern can be calculated using N-beam electron diffraction theory. The scattering matrix formulation of N-beam ED theory has been previously applied to imperfect microcrystals of gold containing stacking disorder (coherent twinning) in the (111) crystal plane. In the present experiment an effort has been made to grow single-crystalline, defect-free (111) gold films of a uniform and accurately know thickness using vacuum evaporation techniques. These represent stringent conditions to be met experimentally; however, if a meaningful comparison is to be made between theory and experiment, these factors must be carefully controlled. It is well-known that crystal morphology, perfection, and orientation each have pronounced effects on relative intensities in single crystals.The double evaporation method first suggested by Pashley was employed with some modifications. Oriented silver films of a thickness of about 1500Å were first grown by vacuum evaporation on freshly cleaved mica, with the substrate temperature at 285° C during evaporation with the deposition rate at 500-800Å/sec.

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