Superradiance of molecular nitrogen ions in strong laser fields
Q. Wang (1, 2), P. Ding (2), S. G. Wilkins (3), M., Athanasakis-Kaklamanakis (1, 4), Y. Zhang (2), Z. Liu (2), B. Hu (2). ((1), CERN, (2) Lanzhou University, (3) Massachusetts Institute of Technology, (4), KU Leuven)
TL;DR
This paper combines theory and experiments to study superradiance in molecular nitrogen ions under strong laser fields, revealing quantum optical properties and demonstrating superradiant optical amplification.
Contribution
It introduces a semiclassical theory of superradiance including detailed temporal and intensity profiles, validated by experimental data on nitrogen gas.
Findings
Good agreement between theory and experiment for 391-nm emission
Confirmation that time-delayed amplification is superradiance
Reveals quantum optical properties in strong-field physics
Abstract
We perform a combined theoretical and experimental investigation of the superradiance in the quantum coherent system generated by strong laser fields. The semiclassical theory of superradiance that includes the superradiant temporal profile, character duration, time delay, intensity is derived. The experimental data and theoretical predictions of 391-nm forward emission as a function of nitrogen gas pressure are compared and show good agreement. Our results not only demonstrate that the time-delayed optical amplification inside the molecular nitrogen ions is superradiance, but also reveal the quantum optical properties of strong-field physics.
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Taxonomy
TopicsLaser-Matter Interactions and Applications · Quantum optics and atomic interactions · Laser Design and Applications