Optically active surfaces formed by ion implantation and thermal treatment

[摘要] Embedded VO2 precipitates have been formed in single-crystal sapphire by the ion co-implantation of vanadium and oxygen and subsequent thermal annealing, The embedded VO2 particles have been shown to exhibit an optical switching behavior that is comparable to that of continuous thin films. In this work, the mechanisms of formation of these optically active particles are investigated, It is shown that precipitation of the vanadium dioxide phase is favored when the thermal treatment is performed on an ion-damaged but still crystalline (rather than amorphized) Al2O3 substrate, The best optical switching behavior is observed in this case, and this behavior is apparently correlated with a more-favorable dispersion of VO2 small particles inside the matrix.

[发布日期] 1997-05-01

[效力级别]  Proceedings Paper