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Single photon generating method based on four-wave frequency mixing effect of Rydberg atom in miniature pool

A technology of four-wave mixing and generation method, applied in optics, lasers, optical components, etc., and can solve problems such as frequency and phase noise

Active Publication Date: 2019-03-15
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are high-efficiency single-photon sources that can meet the needs, such as solid-state devices based on quantum dots, color centers, and single molecules. The interaction of electrons, spin noise, pressure and drift electric field will cause large noise in frequency and phase.

Method used

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  • Single photon generating method based on four-wave frequency mixing effect of Rydberg atom in miniature pool
  • Single photon generating method based on four-wave frequency mixing effect of Rydberg atom in miniature pool
  • Single photon generating method based on four-wave frequency mixing effect of Rydberg atom in miniature pool

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Embodiment Construction

[0015] like figure 1 Shown is the schematic diagram of the structure of the rubidium atom steam pool of the present invention. It can be seen that the excitation pool of the steam pool is a wedge-shaped structure of an isosceles triangle, and the size of the bottom of the isosceles triangle is 100 μm. Rubidium atom vapor is provided. like figure 2 Shown is the light field and the atomic energy level schematic diagram of utilizing rubidium atoms to realize single photon output described in the method of the present invention; the first laser (the first step excitation light), the wavelength is 795nm, and the corresponding transition channel is 5s 1 / 2 →5p 1 / 2 ; The second laser (second step excitation light), the wavelength is 475nm, the corresponding transition channel is 5p 1 / 2 →nS; the third laser (deexcitation light), the wavelength is 480nm, and the corresponding transition channel is nS→5p 3 / 2 ; The fourth laser (single photon output), the wavelength is 780nm, the cor...

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Abstract

The invention relates to the generation of single photon sources, in particular to a single photon generating method based on a four-wave frequency mixing effect in a rubidium atom vapor pool, which comprises the following steps: a first laser with a wavelength of 795nm, a second laser with a wavelength of 475nm and a third laser with a wavelength of 480nm simultaneously enter a polarization beamsplitting prism to synthesize a beam of mixed light, after being focused by a first convex lens, the laser beam enters the rubidium atom steam pool, a single-photon laser beam with a wavelength of 480nm is generated in the rubidium atom steam pool and then is emitted from the rubidium atom steam pool together, and mixed first laser, second laser and third laser are filtered. Strong long-range interaction between Rydberg atoms is used to cause excitation blocking effect, two-step excitation is used to excite atoms into a Rydberg state, in the excitation range, only a single Rydberg atom is used, and deexcitation light is used to make atoms be placed into intermediate state, and finally the single photon released during the change from the intermediate state to the ground state is obtained.

Description

technical field [0001] The invention relates to the generation of a single photon source, which is based on the excitation blocking effect caused by the strong long-range interaction between Rydberg atoms. It is the core device for establishing a quantum communication network at room temperature. Background technique [0002] Single photon sources are an integral part of quantum computing, simulation, sensing, and especially quantum communication. High-efficiency and high-fidelity single-photon sources have always been the goal pursued by people. At present, there are high-efficiency single-photon sources that can meet the needs, such as solid-state devices based on quantum dots, color centers, and single molecules. The influence of the interaction of electrons, spin noise, pressure, and drift electric field will cause large noise in frequency and phase. Based on the single photon generation of neutral atoms or ions, due to the narrow energy level of atoms or ions, the emi...

Claims

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Application Information

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IPC IPC(8): G02F1/35H01S3/227G02B27/28
CPCG02B27/283G02F1/353H01S3/227
Inventor 张好张临杰肖连团贾锁堂
Owner SHANXI UNIV
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