Electromagnetically induced transparency for x rays

TL;DR

This paper predicts and analyzes electromagnetically induced transparency (EIT) for x rays in laser-dressed neon gas, using ab initio calculations near the Ne K edge, revealing potential for ultrafast x-ray research.

Contribution

It introduces a theoretical framework for observing x-ray EIT in neon gas using laser dressing, with ab initio calculations and a three-level model.

Findings

EIT predicted for x rays in neon gas near the K edge

Minimum laser intensity for EIT is around 10^12 W/cm^2

Results enable new research opportunities with ultrafast x-ray sources

Abstract

Electromagnetically induced transparency (EIT) is predicted for x rays in laser-dressed neon gas. The x-ray photoabsorption cross section and polarizability near the Ne K edge are calculated using an ab initio theory suitable for optical strong-field problems. The laser wavelength is tuned close to the transition between 1s^-1 3s and 1s^-1 3p (approximately 800nm). The minimum laser intensity required to observe EIT is of the order of 10^12 W/cm^2. The ab initio results are discussed in terms of an exactly solvable three-level model. This work opens new opportunities for research with ultrafast x-ray sources.