Hiltunen J, Lappalainen J, Puustinen J, Lantto V, Tuller H L
VTT Technical Research Centre of Finland, Kaitovayla 1, Fin-90571 Oulu, Finland.
Opt Express. 2008 May 26;16(11):8219-28. doi: 10.1364/oe.16.008219.
Artificial BaTiO(3)-SrTiO(3) superlattices with stacking periodicity varying between 27 and 1670 A in separate films were grown on MgO substrates by pulsed laser deposition. Both the static and active optical properties were found to be sensitive on the stacking periodicity. Birefringence decreased with increasing individual layer thickness due to relaxation of the interface originated stress. The electro-optic response also showed a layer thickness dependence, reaching a maximum at an individual layer thickness of 13 unit cells.
通过脉冲激光沉积在氧化镁衬底上生长了单独薄膜中堆叠周期在27至1670埃之间变化的人工钛酸钡-钛酸锶超晶格。发现静态和有源光学性质对堆叠周期敏感。由于界面起源应力的松弛，双折射随着单层厚度的增加而降低。电光响应也显示出对层厚度的依赖性，在单层厚度为13个晶胞时达到最大值。
