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Updated: May 17, 2026

Fabrication of Nano-engineered Transparent Conducting Oxides by Pulsed Laser Deposition

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Published on: February 27, 2013

Anomalous collisionally induced transparency.

Litong Xu¹, Guoqian Liao^1,2,3, Xinyao Zhang^1,2

¹Institute of Physics, Chinese Academy of Sciences, Beijing National Laboratory for Condensed Matter Physics, Beijing 100190, China.

Physical Review. E

|May 16, 2026

Summary

This summary is machine-generated.

Intense laser pulses can now penetrate opaque plasmas via a new mechanism called collisionally induced transparency (CIT). This discovery, driven by electron-neutral collisions, works even with non-relativistic lasers.

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Area of Science:

Plasma physics
Nonlinear optics
Laser-matter interactions

Background:

Laser propagation through opaque media is a fundamental challenge.
Existing mechanisms like relativistic self-induced transparency require extremely high laser intensities.

Purpose of the Study:

To investigate anomalous laser pulse propagation in overdense plasmas with neutral atoms.
To identify and characterize a new transparency mechanism for non-relativistic laser intensities.

Main Methods:

Theoretical modeling of laser-matter interactions.
Particle-in-cell simulations to analyze plasma dynamics.
Parametric study of laser parameters and plasma conditions.

Main Results:

A novel mechanism, collisionally induced transparency (CIT), was discovered.
CIT arises from the suppression of self-induced currents by electron-neutral collisions.
Long-wave infrared and terahertz pulses are more susceptible to CIT than near-infrared pulses.

Conclusions:

Collisionally induced transparency (CIT) enables laser penetration of opaque plasmas with non-relativistic intensities.
CIT offers a new pathway for controlling long-wavelength electromagnetic wave propagation in weakly ionized media.
A delayed two-color laser scheme is proposed for validating and enhancing the CIT effect.