Correlation of spontaneous emission in a one-dimensional random medium with Anderson localization

2007 ◽  
Vol 75 (20) ◽  
Author(s):  
Peijun Yao ◽  
Chuanhong Zhou ◽  
Lina Shi ◽  
Xunya Jiang
Keyword(s):  
Spontaneous Emission ◽  
Anderson Localization ◽  
Random Medium ◽  
One Dimensional

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.

scholarly journals Unequivocal signatures of the crossover to Anderson localization in realistic models of disordered quasi-one-dimensional materials

2018 ◽  
Vol 98 (23) ◽  
Author(s):  
Alejandro Lopez-Bezanilla ◽  
Luis S. Froufe-Pérez ◽  
Stephan Roche ◽  
Juan José Sáenz
Keyword(s):  
Anderson Localization ◽  
One Dimensional

scholarly journals The output of a laser amplifier with simultaneous amplified spontaneous emission and an injected seed

2009 ◽  
Vol 27 (3) ◽  
pp. 393-398 ◽  
Author(s):  
H. Huang ◽  
G.J. Tallents
Keyword(s):  
Spontaneous Emission ◽  
Extreme Ultraviolet ◽  
Amplified Spontaneous Emission ◽  
Gain Saturation ◽  
Free Electron Lasers ◽  
Laser Amplifier ◽  
One Dimensional ◽  
X Ray ◽  
Laser Amplifiers ◽  
Harmonic Radiation

AbstractThe minimum irradiance needed to overcome amplified spontaneous emission (ASE) of a seed beam injected into a laser amplifier is evaluated. The treatment is particularly applicable to extreme ultraviolet (EUV) and X-ray laser schemes to inject laser harmonic radiation as a seed into (1) plasma laser amplifiers and (2) free-electron lasers. Simple expressions and calculations are given for the minimum injected irradiance required for amplification of the injected seed beam to exceed ASE from the amplifier, including the effects of gain saturation, assuming one dimensional radiative transfer.

scholarly journals A Study of Coherent Radiation Generated in an Ablative Capillary Discharge

10.14311/1787 ◽  
2013 ◽  
Vol 53 (2) ◽  
Author(s):  
Jakub Hübner ◽  
Pavel Vrba
Keyword(s):  
Physical Model ◽  
Spontaneous Emission ◽  
Amplified Spontaneous Emission ◽  
Coherent Radiation ◽  
Capillary Discharge ◽  
Mhd Equations ◽  
One Dimensional ◽  
X Ray ◽  
Model Based ◽  
Set Up

Feasible soft-X-ray amplification in the CVI and NVII Balmer transition is investigated in a capillary discharge. The best conditions and parameters for the experimental set-up are found for an ablative capillary. The most optimistic results have shown that the gain would be greater than one, which is the condition for successful ASE (Amplified spontaneous emission) in capillary discharges. The capillary discharge evolution is modeled using the NPINCH program, employing a one-dimensional physical model based on MHD equations. The information about the capillary discharge evolution is processed in the FLY, FLYPAPER, FLYSPEC programs, enabling the population to be modeled on specific levels during capillary discharge.

Radiation of charge moving in one-dimensional fine-scale random medium

1991 ◽  
Vol 34 (7) ◽  
pp. 691-693
Author(s):  
F. G. Bass ◽  
S. I. Khankina
Keyword(s):  
Random Medium ◽  
Fine Scale ◽  
One Dimensional

Soluble one-dimensional semiclassical model for spontaneous emission

1976 ◽  
Vol 14 (5) ◽  
pp. 1745-1747 ◽  
Author(s):  
R. C. T. da Costa ◽  
G. A. Pérez Munguia
Keyword(s):  
Spontaneous Emission ◽  
One Dimensional ◽  
Semiclassical Model

ANDERSON LOCALIZATION IN THE SEVENTIES AND BEYOND

2010 ◽  
Vol 24 (12n13) ◽  
pp. 1507-1525 ◽  
Author(s):  
David Thouless
Keyword(s):  
Quantum Hall Effect ◽  
Anderson Localization ◽  
Quantum Hall ◽  
Experimental Tests ◽  
Three Dimensions ◽  
Electronic Systems ◽  
Atomic Systems ◽  
One Dimensional ◽  
Extended States ◽  
Energy States

Little attention was paid to Anderson's challenging paper on localization for the first ten years, but from 1968 onwards it generated a lot of interest. Around that time a number of important questions were raised by the community, on matters such as the existence of a sharp distinction between localized and extended states, or between conductors and insulators. For some of these questions the answers are unambiguous. There certainly are energy ranges in which states are exponentially localized, in the presence of a static disordered potential. In a weakly disordered one-dimensional potential, all states are localized. There is clear evidence, in three dimensions, for energy ranges in which states are extended, and ranges in which they are diffusive. Magnetic and spin-dependent interactions play an important part in reducing localization effects. For massive particles like electrons and atoms the lowest energy states are localized, but for massless particles like photons and acoustic phonons the lowest energy states are extended. Uncertainties remain. Scaling theory suggests that in two-dimensional systems all states are weakly localized, and that there is no minimum metallic conductivity. The interplay between disorder and mutual interactions is still an area of uncertainty, which is very important for electronic systems. Optical and dilute atomic systems provide experimental tests which allow interaction to be much less important. The quantum Hall effect provided a system where states on the Fermi surface are localized, but non-dissipative currents flow in response to an electric field.

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