Large-length-diameter-ratio optical fiber nanoprobe and preparation method and application thereof

Abstract

The invention discloses a large-length-diameter-ratio optical fiber nanoprobe and a preparation method and application thereof. The large-length-diameter-ratio optical fiber nanoprobe comprises an optical fiber body and an optical fiber slender needle located at the front end of the optical fiber body, and the ratio of the length to the diameter of the optical fiber slender needle is not smaller than 20:1. During preparation, one end of an optical fiber is vertically inserted into a corrosion solution to corrode the optical fiber, the end part of the optical fiber is corroded to obtain an optical fiber slender needle with a preset diameter, and the optical fiber slender needle is treated to reach a preset length. When the optical fiber nanoprobe is used, the optical fiber slender needle extends into the hole microstructure, the groove or the boss structure with the large depth-to-width ratio on a sample, so that the optical fiber slender needle and the sample are kept relatively static, and then light is guided in the optical fiber nanoprobe with the large length-to-diameter ratio for optical measurement or optical signal coupling. According to the invention, the problem of measurement of some special structures, such as a hole microstructure with a large depth-to-width ratio, a groove structure with a large depth-to-width ratio or a boss structure with a large depth-to-width ratio, is solved.

Description

technical field [0001] The invention belongs to the field of near-field optical measurement of micro-nano structure and fiber waveguide coupling, and relates to a fiber nano-probe with a large aspect ratio and a preparation method and application thereof. Background technique [0002] At the micro-nano scale, the physical properties of an object are more determined by the micro-nano structure on the surface of the object. For example, the hydrophobic properties of the surface of lotus leaves and the stealth performance of spacecraft are all represented by large-area special micro-structures. from. With the development of scientific research, hole microstructures with large aspect ratios and groove or boss structures with large aspect ratios have been widely used in micro-nano processing. However, some of these large aspect ratio structures are micron in size, and some are Nanoscale structures, regardless of their magnitude, are extremely difficult to measure, and finding a ...

AI Technical Summary

Problems solved by technology

With the development of scientific research, hole microstructures with large aspect ratios and groove or boss structures with large aspect ratios have been widely used in micro-nano processing. However, some of these large aspect ratio structures are micron in size, and some are Nanoscale structures, regardless of their magnitude, are extremely difficult to measure, and it is even more difficult to find a way to solve this problem at the same time

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