The Role of Interference Effects in the Amplification of Light by Stimulated Emission

1981 ◽  
Vol 28 (5) ◽  
pp. 627-640
Author(s):  
A.V. Durrant
Keyword(s):  
Stimulated Emission ◽  
Interference Effects

scholarly journals Few Body Effects in the Electron and Positron Impact Ionization of Atoms

Atoms ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 33
Author(s):  
R.I. Campeanu ◽  
Colm T. Whelan
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Differential Cross ◽  
Impact Ionization ◽  
Inert Gas ◽  
Interference Effects ◽  
Positron Impact ◽  
Competing Interactions ◽  
Energy Sharing

Triple differential cross sections (TDCS) are presented for the electron and positron impact ionization of inert gas atoms in a range of energy sharing geometries where a number of significant few body effects compete to define the shape of the TDCS. Using both positrons and electrons as projectiles has opened up the possibility of performing complementary studies which could effectively isolate competing interactions that cannot be separately detected in an experiment with a single projectile. Results will be presented in kinematics where the electron impact ionization appears to be well understood and using the same kinematics positron cross sections will be presented. The kinematics are then varied in order to focus on the role of distortion, post collision interaction (pci), and interference effects.

Role of current oscillations in ac-dc interference effects inNbSe3

1984 ◽  
Vol 30 (4) ◽  
pp. 2279-2281 ◽  
Author(s):  
R. P. Hall ◽  
A. Zettl
Keyword(s):  
Interference Effects ◽  
Current Oscillations

Role of localized excitons in the stimulated emission in ultra-thin CdSe/ZnSe/ZnSSe single quantum-well structures

1998 ◽  
Vol 23 (6) ◽  
pp. 1189-1195 ◽  
Author(s):  
Shigeo Yamaguchi ◽  
Hitoshi Kurusu ◽  
Yoichi Kawakami ◽  
Shizuo Fujita ◽  
Shigeo Fujita
Keyword(s):  
Quantum Well ◽  
Stimulated Emission ◽  
Single Quantum ◽  
Single Quantum Well ◽  
Quantum Well Structures ◽  
Localized Excitons

The Role of Nonnormality in Overreflection Theory

2010 ◽  
Vol 67 (8) ◽  
pp. 2547-2558 ◽  
Author(s):  
Nikolaos A. Bakas ◽  
Brian F. Farrell
Keyword(s):  
Shear Layer ◽  
Gravity Waves ◽  
Finite Depth ◽  
Stimulated Emission ◽  
Incoming Wave ◽  
Propagating Waves ◽  
Three Stages ◽  
Orr Mechanism ◽  
Weak Stratification

Abstract The role of nonnormality in the overreflection of gravity waves is investigated. In the limit of weak stratification, wave packets having a critical level inside a shear layer of finite depth are reflected with amplified energy. This process, which exhibits the characteristics of stimulated emission, occurs in three stages: first, the incoming wave enters the shear layer and excites nonpropagating perturbations leaning with and against the shear. Subsequently, the energy of perturbations leaning against the shear grows in a manner similar to energy growth of perturbations in constant shear flows, indicating that the Orr mechanism that is slightly modified by stratification underlies the observed growth. Finally, the amplified perturbations excite propagating waves originating from the vicinity of the shear layer boundary. The role of nonnormality in this process is also investigated from the perspective of the associated nonorthogonality of the modes of the dynamical system. It is found that the incident wave packet projects on nonorthogonal analytic modes having the structure of a downward propagating wave in the far field below the shear layer and overreflection expressed by the interaction among these nonorthogonal modes.

Interference effects between raman and parametric stimulated emission

1989 ◽  
Vol 49 (6) ◽  
pp. 521-525 ◽  
Author(s):  
S. G. Dinev ◽  
G. B. Hadjichristov ◽  
I. L. Stefanov
Keyword(s):  
Stimulated Emission ◽  
Interference Effects

No lexical competition without priming: Evidence from the picture–word interference paradigm

2018 ◽  
Vol 71 (12) ◽  
pp. 2562-2570 ◽  
Author(s):  
Hanna S Gauvin ◽  
Magdalena K Jonen ◽  
Jessica Choi ◽  
Katie McMahon ◽  
Greig I de Zubicaray
Keyword(s):  
Interference Effect ◽  
Picture Naming ◽  
Interference Effects ◽  
Lexical Competition ◽  
Semantic Interference ◽  
The Past ◽  
Task Parameters ◽  
Naming Latencies ◽  
And Task

Over the past 40 years, researchers have assumed that semantic interference effects in picture naming reflect competition among lexical candidates during retrieval. In this study, we examined the role of the familiarisation phase in which participants are shown the target pictures and required to rehearse the appropriate names before the picture–word interference (PWI) paradigm is performed. A previous study reported that omitting the familiarisation phase reversed the polarity of the semantic effect to facilitation. In two experiments using between- and within-participants design, respectively, we compared PWI performance with and without familiarisation while using matched stimuli and task parameters. Overall, the results showed the typical semantic interference effect following familiarisation. However, in both experiments, naming latencies did not differ significantly between related and unrelated distractors when familiarisation was omitted. The current findings suggest that familiarisation plays an important role in determining semantic interference in PWI, most likely via raising lexical competitor activation by priming links between targets and related concepts. We also discuss broader implications of our findings with respect to the replicability of reported semantic facilitation effects in PWI.

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