scholarly journals Control of transverse wakefields via phase-matched laser modes in parabolic plasma channels

2019 ◽  
Vol 26 (1) ◽  
pp. 013107 ◽  
Author(s):  
B. Z. Djordjević ◽  
C. Benedetti ◽  
C. B. Schroeder ◽  
E. Esarey ◽  
W. P. Leemans
Keyword(s):  
Plasma Channels ◽  
Laser Modes ◽  
Parabolic Plasma

scholarly journals Filtering higher-order laser modes using leaky plasma channels

2018 ◽  
Vol 25 (1) ◽  
pp. 013103 ◽  
Author(s):  
B. Z. Djordjević ◽  
C. Benedetti ◽  
C. B. Schroeder ◽  
E. Esarey ◽  
W. P. Leemans
Keyword(s):  
Higher Order ◽  
Plasma Channels ◽  
Laser Modes

Transverse Wakefield Control via Phase-Matched Laser Modes in Plasma Channels

2018 ◽  
Author(s):  
Blagoje Z. Djordjevic ◽  
Carlo Benedetti ◽  
Carl B. Schroeder ◽  
Eric Esarey ◽  
Wim P. Leemans
Keyword(s):  
Plasma Channels ◽  
Laser Modes

Effect of conductive screens on the stabilization of plasma channels with currents of hundreds kAmps

2016 ◽  
Vol 13 (7) ◽  
pp. 788-791
Author(s):  
V. D. Bochkov ◽  
D. V. Bochkov ◽  
S. I. Krivosheev ◽  
Yu. E. Adamian
Keyword(s):  
Plasma Channels

Finite Difference Time Domain Simulations of Hybrid Neurotransducers Based Optical Microlasers

2020 ◽  
Author(s):  
Maurizio Manzo ◽  
Omar Cavazos
Keyword(s):  
Finite Difference ◽  
Chronic Traumatic Encephalopathy ◽  
Numerical Technique ◽  
Well Being ◽  
Infrared Light ◽  
Neuron Activity ◽  
Living Matter ◽  
Brain Functions ◽  
Laser Modes ◽  
The Brain

Abstract Different pathologies such as Alzheimer’s, Parkinson’s, Wilson’s diseases, and chronic traumatic encephalopathy due to blasts and impacts affect the brain functions altering the neuronal electrical activity. An important aspect of the brain study is the use of non-invasive, non-surgical methodologies that are suitable to the well-being of the patients. Only a portion of the electromagnetic field can be detected by applying sensors outside the scalp; in addition, surgery is often involved if sensors are applied in the subcutaneous region of the skull. Optical techniques applied to biomedical research and diagnostics have been spread during the last decades. For example, near infrared light (NIR) of spectral range goes from 800 nm to 1300 nm, it is harmless radiation for the living tissue, and can penetrate the living matter in depth as, it turns out that most of the living matter is transparent to the NIR light. Optical microlasers have been recently proposed as neurotransducers for minimally invasive neuron activity detection for the next generation of brain-computer interface (BCI) systems. They are lightweight, require low power consumption and exhibit low latency. This novel sensor that can be made of biocompatible material is coupled with a voltage sensitive dye; the fluorescence of the dye, which is excited by an external light source, is used to generate optical (laser) modes. Any variation in the neurons’ membrane electric potential via evanescent field’s perturbation turn affect the shifting of these laser modes. In order to reduce the energy required to power these devices and to improve their optical emission, metal nanoparticles can be coupled in order to use their plasmonic effect. In this paper, finite-difference timedomain (FDTD) numerical technique is used to analyze the performances on a dye-doped microlaser. Purcell effect and resonant wavelengths are observed.

scholarly journals Accordion effect revisited: Generation of comb-like electron beams in plasma channels

2016 ◽  
Author(s):  
S. Y. Kalmykov ◽  
X. Davoine ◽  
R. Lehe ◽  
A. F. Lifschitz ◽  
B. A. Shadwick
Keyword(s):  
Electron Beams ◽  
Plasma Channels ◽  
Accordion Effect
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