Optical recording of reversed domains in a Ce-doped SBN:75 crystal for bit-oriented three-dimensional optical memory

Abstract

We developed a bit-oriented three-dimensional recording with a Ce-doped ${\mathrm{Sr}}_{0.75}{\mathrm{Ba}}_{0.25}{\mathrm{Nb}}_2{\mathrm{O}}_6$ (SBN:75) crystal. The ferroelectric polarization was reversed by a focused laser beam in a crystal with a temperature of $38 °\mathrm{C}$ to form bit data. The recorded domain was stable at $15 °\mathrm{C}.$ The data were read as the refractive-index change induced by spontaneous polarization through the Pockels effect. We wrote a single datum in SBN:75 crystal with ferroelectric-domain reversal and observed the domain image with a phase-contrast microscope. Numerical calculations to estimate the domain image were also performed. The observed results were in good agreement with the numerical expectations.

© 2000 Optical Society of America

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