Controlling resonant enhancement in higher-order harmonic generation

TL;DR

This paper introduces a method to control resonant enhancement in high-order harmonic generation by tuning engineered potentials, enabling precise control over emitted photon energies and intensities in extreme ultraviolet and soft x-ray ranges.

Contribution

The study demonstrates a novel approach to manipulate harmonic emission via potential parameter adjustments, supported by numerical solutions of the time-dependent Schrödinger equation.

Findings

Resonant harmonic emission can be tuned by adjusting potential parameters.

The method allows control over photon energy and intensity in HHG.

Scaling laws for harmonic emission are derived from numerical simulations.

Abstract

We present a method to tune the resonantly enhanced harmonic emission from engineered potentials, which would be experimentally feasible in the purview of the recent advances in atomic and condensed matter physics. The recombination of the electron from the potential dependent excited state to the ground state causes the emission of photons with a specific energy. The energy of the emitted photons can be controlled by appropriately tweaking the potential parameters. The resonant enhancement in high-harmonic generation enables the emission of very intense extreme ultra-violet or soft x-ray radiations. The scaling law of the resonant harmonic emission with the model parameter of the potential is also obtained by numerically solving the time-dependent Schr\"odinger equation in two dimensions.