A resonant cavity and single photon source system for generating single photons

A single photon source and resonant cavity technology, which is applied in the field of resonant cavity and single photon source system, can solve problems such as background noise and efficiency loss, and achieve the effect of improving single photon purity, increasing photon generation rate and collection and utilization efficiency

Active Publication Date: 2022-02-22
CHINA JILIANG UNIV
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  • Claims
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Problems solved by technology

However, while the resonance excitation method based on monochromatic light improves the quality of photons, the excitation light will bring background noise, which generally requires high-precision polarization filtering to remove it, resulting in a 50% efficiency loss.

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  • A resonant cavity and single photon source system for generating single photons
  • A resonant cavity and single photon source system for generating single photons
  • A resonant cavity and single photon source system for generating single photons

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Embodiment Construction

[0028] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings, but these embodiments do not limit the present invention, those of ordinary skill in the art make structural, method, or functional changes based on these embodiments All are included in the scope of protection of the present invention.

[0029] according to figure 1 As shown, a single photon source system, the system includes: a resonant cavity that generates single photons and an excitation light generation system;

[0030] The resonant cavity 20 includes a resonant cavity body and a substrate 40. The resonant cavity body includes an upper reflective layer 21, a lower reflective layer 23, and a sandwich structure formed by a grating layer 22 arranged in the middle of the upper reflective layer 21 and the lower reflective layer 23. The upper reflector The layer 21 and the lower reflective layer 23 adopt a metal film or a metal-like f...

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Abstract

The invention discloses a resonant cavity for generating single photons, which includes: a resonant cavity and a substrate, the resonant cavity includes an upper reflective layer, a lower reflective layer and a The sandwich structure formed by the grating layer, the upper reflective layer and the lower reflective layer adopt metal thin film or metal-like thin film, the grating layer is provided with a grating microstructure to form an optical microcavity, and the substrate is arranged in the resonant cavity The bottom of the substrate, the substrate is a truncated inverted cone substrate, and the surface of the substrate in contact with the lower reflective layer is provided with a two-dimensional superstructure for improving reflection efficiency; and includes the resonant cavity and the excitation light generation system A single-photon source system, the excitation light generation system emits the excitation photons generated by it into the resonant cavity, and the excitation photons are emitted from the resonant cavity after multiple reflections in the grating microstructure .

Description

technical field [0001] The invention belongs to the field of single photon sources, and in particular relates to a resonant cavity and a single photon source system for generating single photons. Background technique [0002] Single-photon source technology, quantum encoding and transmission technology, and single-photon detection technology are the three core technologies in quantum communication. A large number of studies have proved that quantum communication is absolutely safe under a single-photon source, and has a high probability of occurrence. and absorption efficiency. [0003] An ideal single photon source can be used as a luminescent light source signal in quantum communication and quantum computing. The photon light source refers to the source of optical signal generation in the optical interconnection network, and the optical signal generated by it is a single photon. It can be seen that the ideal single photon source is an important guarantee for quantum comm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/06H01S3/08
CPCH01S3/0627H01S3/08059
Inventor 窦婷婷金尚忠石岩赵春柳陈君郝然
Owner CHINA JILIANG UNIV
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