A device and method for two-dimensional imaging based on single photon counting

Abstract

The invention relates to the field of nano-imaging. In order to solve the problem of imaging nano-fiber size devices, a device for two-dimensional imaging using single photon counting is disclosed, including a vacuum chamber, an aspheric mirror, a laser, a displacement platform, and a collimator. device, high-speed scanning galvanometer, coupler, single photon counter, data acquisition card and computing unit; the laser light emitted by the laser is transmitted to the nano-fiber to be tested in the vacuum chamber through a single-mode fiber and then scattered, and the scattered light signal collected by the aspheric mirror After passing through the first and second 45-degree mirrors, collimation device and high-speed scanning galvanometer, it is incident on the single photon counter through the coupler, and the data acquisition card is used to collect the electrical signal obtained by the photoelectric conversion of the single photon counter and send it to computing unit. The invention uses single photon counting to obtain optical fiber two-dimensional imaging, has high imaging precision and good image restoration, and can be widely used in the field of two-dimensional imaging of optical transmission media with a size of hundreds of nanometers.

Description

technical field [0001] The invention relates to the field of nanometer imaging, in particular to a device and method for two-dimensional imaging based on single photon counting. Background technique [0002] At present, there are transmission electron microscopy, scanning tunneling microscopy, atomic force microscopy and other techniques for the detection and characterization of nanomaterials. For example, a high-resolution scanning electron microscope can scan and image barium titanate ceramics with a grain size of 20 nm. However, the high-resolution scanning electron microscope can only obtain the morphology observation or size detection of nano-scale materials, and cannot obtain the overall structural information of larger-sized objects without loss. In addition, the developed fluorescence imaging system can achieve a spatial resolution of tens of nanometers, but due to the autofluorescence phenomenon of the object and the residual excitation light signal, there is a lar...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of low resolution and inability to realize quantum tomography in existing common imaging devices, the present invention provides a high-precision and high-resolution two-dimensional imaging device and method based on single photon counting

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