Observation of solid surfaces by an optical second harmonic microscope

用光学二次谐波显微镜观察固体表面

• 批准号: 07554052
• 负责人: MIZUTANI Goro
• 金额: $ 0.45万
• 依托单位: Japan Advanced Institute of Science and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07554052/
• 关键词: second harmonic generation; optical second harmonic microscope; hanlinear optics; surface physics; 光第二高調波発生顕微鏡; 表面物性; 非面物性

Optical second harmonic generation (SHG) has a useful feature as a surface probe : high sensitivity to the symmetry at surfaces. We have developed a SH microscope as a new surface probe with excellent spatial resolution and have carried out various studies on surface physics using the SH microscope.(1) The developed SHG microscope system has high sensitivity and high signal to nose (S/N) ratio enough to detect the weak surface SH light. The spatial resolution of the developed SH microscope is about 1mum.(2) We have observed SH intensity images of cleaved GaAs(110) surfaces in order to demonstrate that the SHG microscope is powerful in observing small structures (steps and holes) with the size of a few micrometers on surfaces. Especially we have discovered an interesting phenomenon : The SH intensity from slab structures was enormously enhanced due to the interference of multi-reflected incident light.(3) We have obtained SH intensity images of metal grating surface with the SH microscope, for the first tome. The SH images had a feature of a stripe pattern, and the SH intensity at the bottom of the grooves was much higher than that on the tops of the grooves. The result indicates that the electric field at the bottom of the groove is enhanced and intensifies the SH response.

光学二次谐波产生（SHG）作为表面探针具有一个有用的特点：对表面对称性的高灵敏度。我们已经开发了一种SH显微镜作为一种新的表面探针具有良好的空间分辨率，并进行了各种研究表面物理使用SH显微镜。(1)研制的SHG显微系统具有高灵敏度和高信噪比，足以检测到微弱的表面SH光。研制的SH显微镜的空间分辨率约为1 μ m。(2)我们观察了解理GaAs（110）表面的SH强度图像，以证明SHG显微镜在观察表面上尺寸为几微米的小结构（台阶和孔）方面是强大的。特别是我们发现了一个有趣的现象：由于多次反射入射光的干涉，板状结构的SH强度大大增强。(3)首次用SH显微镜获得了金属光栅表面的SH强度像。SH图像具有条纹图案的特征，并且沟槽底部的SH强度远高于沟槽顶部。结果表明，沟槽底部的电场增强，增强了SH响应。

项目成果

T.Yamauchi: "Surface SHG and photoemission from Cs/p-GaAs and the Cs/O2/p-GaAs coadsorbed system" Surface Science. 363. 385-390 (1996)

T.Yamauchi：“Cs/p-GaAs 和 Cs/O2/p-GaAs 共吸附系统的表面 SHG 和光电子发射”表面科学。

H.Tanaka et al.: "Optical second harmonic intensity image of multi-layred metal film patterns" Progress in Crystal Growth & Characterization of Materials. 33. 129-132 (1996)

H.Tanaka等人：“多层金属膜图案的光学二次谐波强度图像”晶体生长的进展

H.Tanaka: "Optical second harmonic intensity image of multi-layered metal film patterns" Progress in Crystal Growth & Characterization of Materials. 33. 129-132 (1996)

H.Tanaka：“多层金属膜图案的光学二次谐波强度图像”晶体生长研究进展

M.Takebayashi: "Azimuthal angle dependence of optical second harmonic intensity from a vicinal GaAs (001) wafer" Optics Communications. 133. 116-122 (1997)

M.Takebayashi：“邻近 GaAs (001) 晶圆的光学二次谐波强度的方位角依赖性”光学通讯。