Single photon light source

By generating a single-photon source in the nano-gap between metal nanoparticles and metal layers, and utilizing Purcell enhancement technology, the problems of low transmission rate and insufficient stability of existing single-photon sources are solved, achieving efficient single-photon generation and transmission.

CN121694046APending Publication Date: 2026-03-17BRIGHT QUANTUM INC
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Patent Information

Application Number
CN202480052578.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2023-08-11
Filing Date
2024-08-07
Publication Date
2026-03-17

AI Technical Summary

Technical Problem

Existing single-photon light sources have low transmission rates and insufficient stability in long-distance transmission, which cannot meet the practical needs of quantum communication and quantum computing.

Method used

A single-photon light source is designed by placing the emitting element in the nano-gap between metal nanoparticles and metal layers. By adjusting the Purcell enhancement of the nano-gap, single photons with high repetition rate and high concentration rate are generated. The luminous efficiency is improved by utilizing a plasmonic nanoantenna structure.

Benefits of technology

It achieves high-purity, high-brightness, and high-repetition-rate single-photon generation at room temperature, simplifies the preparation process, reduces costs, and is suitable for quantum communication and quantum computing.

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Abstract

The present invention relates to a single-photon light source in which a light emitter is positioned in a nanogap of a nanoantenna including metal nanoparticles and a metal layer, and a single photon having a high repetition rate and a high light concentration rate is generated by adjusting the Pelsel enhancement of the nanogap. The single-photon light source is simple in structure, easy to prepare and low in preparation cost, and the single photons are emitted vertically upwards through the optical antenna structure of the nanometer antenna, so that the single-photon light source has the advantage of being excellent in light condensation rate. In addition, a single photon can be generated by applying various illuminants to the nano antenna, and the nano antenna has the advantages of wide bandwidth, high yield, capability of operating at various wavelengths at room temperature, and the like.
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