FABRICATION AND APPLICATION OF NEARFIELD OPTICAL FIBRE PROBE

• 来源期刊: 中国物理（英文版）
• 学科: 物理学
• 关键词: two-step chemical etching large cone angle film-coated bent probe optical transmission efficiency
• 年，卷（期）: 2001,（7）
• 所属期刊栏目: GLASSICAL AREAS OF PHENOMENOLOGY
• 页码范围: 631-635
• 页数: 5页
• 分类号: O4
• 语种: 英文

摘要

In this paper, the fabrication of a large cone angle near-field optical fibre probe, using the two-step chemical etching method and bent probe, is introduced, and the controlling parameters of the coated Cr-Al film at the probe tip are presented. The scanning electron microscopy images display that the tip diameter of the uncoated large cone angle fibre probe obtained is less than 50nm, the cone angle over 90°, and the diameter of light aperture at the coated probe tip is less than 100nm. The measured results of the optical transmission efficiency for various probe tips show that the uncoated straight optical fibre probe, film-coated straight probe and film-coated bent probe are 3×10-1, 2×10-3, and l×10-4 times that of the flat fibre probe, respectively. In addition, the force images and near-field optical images of a standard sample are acquired using a large cone angle and film-coated bent probe.