Method for packaging single NV color center and single NV color center device

Abstract

The embodiment of the invention discloses a method for packaging a single NV color center and a single NV color center device. The method comprises the following steps: a), fixing two optical fibers, wherein end faces of the two optical fibers are opposite, the first optical fiber is connected with a laser and used for transmitting exciting light, and the second optical fiber is connected with a spectrometer; b), dropping turbid liquids containing single-crystal diamond particles between the two end faces of the two optical fibers, observing whether typical fluorescence of the NV color center appears on the spectrometer after the turbid liquids are evaporated, executing the c) step if the typical fluorescence appears on the spectrometer, and executing the e) step if the typical fluorescence does not appear on the spectrometer; c), connecting the second optical fiber to a TAC (time-to-amplitude converter), measuring a reverse correlation function, judging whether to be the single NV color center, if so, executing the d) step, and otherwise, executing the e) step; d), connecting the two end faces of the two optical fibers to finish the package; and e), washing away the single-crystal diamond particles between the two end faces of the two optical fibers, and repeating the b) step. According to the invention, the process of searching and positioning the single NV color center is simplified, the cost of searching and positioning the single NV color center is reduced, and the research and application of the single NV color center are convenient.

Description

technical field [0001] The invention relates to the encapsulation technology of single NV color center diamond particles, in particular to a single NV color center encapsulation method and a single NV color center device. Background technique [0002] In diamond crystals, there is an impurity defect in which N atoms replace C atoms. When this impurity defect is adjacent to a C atom vacancy, an NV color center is formed. A single NV color center has a special electronic structure and optical transition properties, which makes it potentially important in the fields of quantum information, quantum computing, and magnetic field measurement and magnetic imaging. In addition, a single NV color center is also an excellent single photon source , with high quantum fluorescence yield and good stability at room temperature. [0003] The premise of using a single NV color center is to be able to find a single NV color center. At present, the method used to find and confirm a single NV ...

AI Technical Summary

Problems solved by technology

[0004] 1) The confocal microscopy system requires the best microscopic imaging system and nanoscale scanning system, so it will inevitably lead to high costs;

[0005] 2) It takes a lot of time and manpower to find and locate a single NV color center;

[0006] 3) The confocal microscopy system is not easy to transplant to external field systems such as low temperature, magnetic field and electric field;

[0007] 4) A single NV color center found by confocal microscopy cannot be used without the confocal microscopy system;

[0008] 5) Since the focus of the confocal microscope system will drift due to various external factors such as temperature and interference, the positioning of a single NV color center will be unstable;

[0009] 6) Confocal microscopy can only be used to study one NV color center at the same time. A confocal microscope system can only correspond to one or a group of color centers. Once the color center is replaced, it is difficult to find the original color center.

Images