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首页> 外文期刊>Optik: Zeitschrift fur Licht- und Elektronenoptik: = Journal for Light-and Electronoptic >Microstructure, optical and static recording properties of AgO_x film, and near-field simulation of sub-wavelength aperture based on the AgO _x marks' formation
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Microstructure, optical and static recording properties of AgO_x film, and near-field simulation of sub-wavelength aperture based on the AgO _x marks' formation

机译：AgO_x薄膜的微观结构，光学和静态记录特性以及基于AgO _x标记形成的亚波长孔径的近场模拟

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摘要

Structures, spectra and surface topographies of as-deposited and annealed AgO_x films have been investigated by an X-ray diffractometer, a spectrophotometer and an atomic force microscopy (AFM). X-ray diffraction and spectrum results show that the as-deposited AgO_x films with high oxygen ratios (x<0.5) are in amorphous states and Ag crystalline particles will separate out after annealed. AFM results show that the film surface will become much rougher and film thickness will increase greatly after annealed due to the decomposition of AgO_x with release of oxygen. Static recording results show that two microstructures of the recording marks can be produced: one is the bubble mark at a low recording power and the other is the rupture bubble with an ablated aperture (hole) in the center at a high recording power. Based on the formation of rupture bubble marks, the near-field optical distribution of a focused Gaussian laser beam through a sub-wavelength aperture (200 nm in diameter) has been simulated using finite-difference-time-domain (FDTD) method. Results show that the spot size can be greatly squeezed with still highly transmitted intensity, which may lead to the super-resolution readout.
机译：通过X射线衍射仪，分光光度计和原子力显微镜（AFM）研究了沉积和退火后的AgO_x薄膜的结构，光谱和表面形貌。 X射线衍射和光谱结果表明，高氧比（x <0.5）沉积的AgO_x薄膜处于非晶态，退火后Ag晶体颗粒会分离出来。 AFM结果表明，退火后由于AgO_x随着氧气的释放而分解，薄膜表面会变得更粗糙，薄膜厚度也会大大增加。静态记录结果表明，可以产生记录标记的两个微结构：一个是在低记录功率下的气泡标记，另一个是在高记录功率下中心具有烧蚀的孔（孔）的破裂气泡。基于破裂气泡标记的形成，已使用有限差分时域（FDTD）方法模拟了聚焦高斯激光束通过亚波长孔径（直径200 nm）的近场光学分布。结果表明，在仍然具有很高的透射强度的情况下，可以极大地压缩光斑大小，这可能导致超分辨率读数。

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