Formation of the maze domain structures in lithium niobate as a result of multiple pulse irradiation by infrared laser

V Ya Shur,E A Mingaliev,M S Kosobokov,A V Makaev

doi:10.1088/1757-899x/699/1/012052

Abstract

The formation of the maze domain structures in the plates of congruent lithium niobate single crystal caused by multiple irradiation of infrared pulsed laser at different plate temperatures was studied. Four stages of domain evolution with increasing pulse number were distinguished. The dependence of the formed self-organizing domain structures on pulse number and sample temperature was revealed. Suppression of the domain formation at the elevated temperatures was attributed to increasing ionic conductivity, which led to decreasing the switching field.

Highlights

The modern development of telecommunication technologies requires manufacturing submicron and nanoscale periodic domain structures for use in various types of optical components, such as electrically controlled Bragg reflectors, beam control devices, and narrow-band filters [1,2,3].Backward second harmonic generation (SHG), corresponding to the propagation of the wave with the fundamental frequency in the direction opposite to its second harmonic, requires the creation of submicron gratings with nanoscale accuracy of period reproduction [4]
The formation of the maze domain structures in the plates of congruent lithium niobate single crystal caused by multiple irradiation of infrared pulsed laser at different plate temperatures was studied
We show how multiple laser irradiation with controlled initial temperature affects morphology of the domain structure

Summary

Introduction

The modern development of telecommunication technologies requires manufacturing submicron and nanoscale periodic domain structures for use in various types of optical components, such as electrically controlled Bragg reflectors, beam control devices, and narrow-band filters [1,2,3].Backward second harmonic generation (SHG), corresponding to the propagation of the wave with the fundamental frequency in the direction opposite to its second harmonic, requires the creation of submicron gratings with nanoscale accuracy of period reproduction [4]. The formation of the maze domain structures in the plates of congruent lithium niobate single crystal caused by multiple irradiation of infrared pulsed laser at different plate temperatures was studied. The dependence of the formed self-organizing domain structures on pulse number and sample temperature was revealed.

Results

Conclusion