The laser polarization as control parameter in the pattern formation

TL;DR

This paper analyzes how laser polarization influences surface pattern formation, showing it breaks symmetry and leads to new surface features, with predictions testable through experiments.

Contribution

It introduces a model linking laser polarization to surface pattern anisotropy and predicts novel morphological features caused by polarization effects.

Findings

Polarization breaks rotational symmetry in surface patterns.

Surface structures correlate with polarization degree and direction.

New features in surface morphology and evolution are predicted.

Abstract

The recently observed dependence of the periodic surface structures on the light polarization in the laser induced pattern formation is analyzed within a model where the polarization induces significant deviation the spatial distribution of the energy deposited by the photon from isotropic energy distribution. We argue that the laser polarization breaks the rotation symmetry on the surface and is responsible for the correlation of the surface structures with the degree and the direction of polarization. Moreover it is shown that the polarization induces the appearence of novel features of the surface morphology and time evolution, which could be directly tested experimentally.