Nanoacoustic Defect Manipulation in Solids

TL;DR

This paper introduces a novel nanoacoustic method for defect manipulation in ionic solids, demonstrating that ultrasonic treatment at room temperature can effectively remove radiation-induced optical absorption by promoting defect migration.

Contribution

The study presents the concept of nanoacoustic defect manipulation, highlighting defect migration driven by ultrasonic fields and proposing acoustically-stimulated chemical reactions as a new defect removal technique.

Findings

Ultrasonic treatment removes radiation-induced optical absorption.

Defect migration is driven by ultrasonic fields.

Acoustically-stimulated chemical reactions influence defect dynamics.

Abstract

Within a nanoscale volume, an acoustic wave interacts with radiation defects in ionic solids. The radiation-induced optical absorption in ionic crystals is remarkably removed by a room-temperature ultrasonic treatment of the crystals. It is shown that the effect can be explained by defect migration processes occurring in ultrasonic fields. The inter-ion charge exchange, termed as acoustically-stimulated chemical reaction, is furthermore suggested to occur affecting the defect migration. This new method of a cold annealing of radiation defects in solids can be regarded as nanoacoustic defect manipulation.