scholarly journals Classical wave propagation in periodic and random media

1994 ◽  
Author(s):  
Sreela Datta
Keyword(s):  
Wave Propagation ◽  
Random Media ◽  
Classical Wave

scholarly journals Delay time of waves performing Lévy walks in 1D random media

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
L. A. Razo-López ◽  
A. A. Fernández-Marín ◽  
J. A. Méndez-Bermúdez ◽  
J. Sánchez-Dehesa ◽  
V. A. Gopar
Keyword(s):  
Wave Propagation ◽  
Wide Class ◽  
Delay Time ◽  
Disordered Systems ◽  
Random Media ◽  
Statistical Properties ◽  
Lévy Walks ◽  
Classical Wave ◽  
Wave Diffusion ◽  
Random Fluctuations

AbstractThe time that waves spend inside 1D random media with the possibility of performing Lévy walks is experimentally and theoretically studied. The dynamics of quantum and classical wave diffusion has been investigated in canonical disordered systems via the delay time. We show that a wide class of disorder—Lévy disorder—leads to strong random fluctuations of the delay time; nevertheless, some statistical properties such as the tail of the distribution and the average of the delay time are insensitive to Lévy walks. Our results reveal a universal character of wave propagation that goes beyond standard Brownian wave-diffusion.

scholarly journals Anomalous Anderson localization behavior in gain-loss balanced non-Hermitian systems

Nanophotonics ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 443-452
Author(s):  
Tianshu Jiang ◽  
Anan Fang ◽  
Zhao-Qing Zhang ◽  
Che Ting Chan
Keyword(s):  
Wave Propagation ◽  
Electromagnetic Waves ◽  
Anderson Localization ◽  
Random Media ◽  
Normal Incidence ◽  
Disordered Media ◽  
One Dimensional ◽  
Gain Loss ◽  
The Waves ◽  
Localization Behavior

AbstractIt has been shown recently that the backscattering of wave propagation in one-dimensional disordered media can be entirely suppressed for normal incidence by adding sample-specific gain and loss components to the medium. Here, we study the Anderson localization behaviors of electromagnetic waves in such gain-loss balanced random non-Hermitian systems when the waves are obliquely incident on the random media. We also study the case of normal incidence when the sample-specific gain-loss profile is slightly altered so that the Anderson localization occurs. Our results show that the Anderson localization in the non-Hermitian system behaves differently from random Hermitian systems in which the backscattering is suppressed.

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