Form-Birefringence in ITO Thin Films Engineered by Ultrafast Laser Nanostructuring,ACS Photonics

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Form-Birefringence in ITO Thin Films Engineered by Ultrafast Laser Nanostructuring
ACS Photonics ( IF 6.5 ) Pub Date : 2017-11-03 00:00:00 , DOI: 10.1021/acsphotonics.7b01082
Ausra Cerkauskaite ₁ , Rokas Drevinskas ₁ , Asi Solodar ₂ , Ibrahim Abdulhalim _{2,

3} , Peter G. Kazansky ₁

Affiliation

The field of surface nanostructuring is growing rapidly with the need to search for more advanced fabrication solutions. The major challenge is the lack of appropriate combination of time/cost efficient techniques and medium possessing the advantages of both flexibility and tunable optical properties. Here we demonstrate direct-write femtosecond laser nanostructuring of indium–tin-oxide thin film where the deep-subwavelength ripples with periodicity of down to 120 nm are realized originating the form birefringence (|Δn| ≈ 0.2), which is 2 orders of magnitude higher than the commonly observed in uniaxial crystals or femtosecond laser nanostructured fused quartz. The demonstrated nanoripples with its continuously controlled space-variant orientation lead to the high density two-dimensional printing of flat optical elements. The technique can be extended to any highly transparent films that support laser-induced periodic surface structures, and can be effectively exploited for the integration of polarization sensitive modifications into multidimensional optical data storage.

中文翻译：

通过超快激光纳米结构设计的ITO薄膜中的形式双折射

随着寻求更先进的制造解决方案的需求，表面纳米结构领域正在迅速发展。主要的挑战是缺乏时间/成本高效技术和具有灵活性和可调谐光学特性优势的介质的适当组合。在这里，我们演示了铟锡氧化物薄膜的直接写入飞秒激光纳米结构，其中实现了周期低至120 nm的深亚波长波纹，其形式是双折射（| Δn| ≈0.2），比单轴晶体或飞秒激光纳米结构熔融石英中常见的数量级高2个数量级。具有连续控制的空间变化取向的已证实的纳米波纹导致平面光学元件的高密度二维印刷。该技术可以扩展到支持激光诱导的周期性表面结构的任何高度透明的膜，并且可以有效地用于将偏振敏感的修改集成到多维光学数据存储中。

更新日期：2017-11-05

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