High-efficiency fluorescence detection device based on solid-state spin system

Abstract

The invention relates to an NV color center gyro fluorescence collection system and in particular relates to a high-efficiency fluorescence detection device based on a solid-state spin system. The device comprises a 532 laser machine, wherein a polarizing film, a first convex lens, an acoustic optical modulator, a second convex lens and a fourth convex lens are sequentially arranged on a light path of the 532 laser machine; the fourth convex lens is directly opposite to a diamond; the diamond is arranged on a filter; the lower side of the filter is in contact with a photodiode; a prism reflector is arranged on the filter; the photodiode is connected with a lock-in amplifier; the lock-in amplifier is respectively connected with a PID (Proportion Integration Differentiation) controller and an acquisition card; the output end of the PID controller is connected with a microwave source; a signal source output end is respectively connected with the lock-in amplifier and the microwave source; and a radio frequency antenna is connected to the microwave source. According to the device disclosed by the invention, fluorescence side band collection is realized, the traditional confocal measurement method is replaced, the improved system structure is greatly simplified, the collection efficiency is greatly improved, and the device is very suitable for miniaturized installation and lays a foundation for later system integration.

Description

technical field [0001] The invention relates to an NV color center gyro fluorescence collection system, in particular to a high-efficiency fluorescence detection device based on a solid-state spin system. Background technique [0002] Fluorescence is a common light-emitting phenomenon in nature. Usually, after the electrons outside the nucleus are excited to transition from the ground state S0 to the excited state S1, they will quickly land at the lowest vibrational energy level through a non-radiative transition, and then return to the ground state from the lowest vibrational energy level, releasing energy in the form of photon radiation. Emerging light with this property is called fluorescence. [0003] The atomic gyroscope is a new technology developed in recent years. It mainly uses laser pumping to polarize the target electrons to sense the rotation of the external carrier (spin polarization). The gyroscope made by relying on the target atomic spin has the advantages ...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the current NV color center gyroscope using objective lens collection method for fluorescence collection, the NV color center nuclear magnetic resonance sensing system has problems such as long collection distance, large volume, complex structure and low efficiency, and proposes a solid-state automatic High-efficiency fluorescence detection device with spin system

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