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$Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing$

Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing

Published on: April 25, 2019

Schwinger limit attainability with extreme power lasers.

Stepan S Bulanov¹, Timur Zh Esirkepov, Alexander G R Thomas

¹University of Michigan, Centre of Ultrafast Optical Sciences, Ann Arbor, Michigan 48109, USA.

Physical Review Letters

|January 15, 2011

Summary

High-intensity lasers create electron-positron plasma that scatters light. Polarization impacts radiation friction and avalanche effects, analogous to synchrotron radiation in accelerators.

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Area of Science:

Plasma Physics
Quantum Electrodynamics
High-Energy Laser Interactions

Background:

High-intensity colliding laser pulses generate electron-positron pair plasma.
This plasma can scatter electromagnetic waves, hindering access to critical quantum electrodynamics (QED) fields.
Schwinger mechanism seeds pair production, influencing plasma behavior.

Purpose of the Study:

Investigate the influence of electromagnetic wave polarization on radiation friction and electron-positron avalanche.
Analyze the impact of these effects on particle motion and laser pulse evolution.
Draw analogies between laser-plasma interactions and synchrotron radiation in accelerators.

Main Methods:

Theoretical analysis of electron-positron pair plasma dynamics under intense laser fields.
Modeling radiation friction and avalanche effects based on Schwinger mechanism.
Comparison of outcomes for circularly and linearly polarized laser pulses.

Main Results:

Radiation friction and avalanche effects are strongly dependent on laser polarization.
Circularly polarized pulses lead to dominant effects on particle motion and pulse evolution.
Linearly polarized pulses exhibit weaker radiation friction and avalanche effects.
An analogy is drawn to synchrotron radiation losses in circular versus linear electron accelerators.

Conclusions:

Electromagnetic wave polarization is a critical factor in high-intensity laser-plasma interactions.
The observed phenomena highlight the complex interplay between plasma dynamics and QED effects.
The analogy to synchrotron radiation provides a useful framework for understanding energy loss mechanisms in different polarization regimes.