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Ring cavity nanometer antenna for controlling radiation of plurality of random incoherent single-photon emitters

A nano-antenna and transmitter technology, which is applied in the direction of antenna, radiating element structure, antenna grounding switch structure connection, etc., can solve the problems of difficult photodetector detection, difficult preparation, and non-directional radiation, etc., to improve radiation strength, increase collection efficiency, and simplify process requirements

Active Publication Date: 2017-11-17
INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to really use the single photon emitter in practice, two problems must be solved: 1) the radiation intensity of the single photon emitter itself is very small, which is difficult to be detected by the photodetector; 2) the polarity arrangement of the single photon emitter is not correct. Controlled, its radiation is generally non-directional
At the same time, there is a Stoke-shift of tens to hundreds of nanometers between the excitation frequency band and the emission frequency band of the single-photon emitter. The common simple nano-antenna design is difficult to enhance its excitation intensity and emission intensity at the same time. However, complex nanostructures have high requirements on epitaxial equipment and are difficult to prepare.

Method used

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  • Ring cavity nanometer antenna for controlling radiation of plurality of random incoherent single-photon emitters
  • Ring cavity nanometer antenna for controlling radiation of plurality of random incoherent single-photon emitters
  • Ring cavity nanometer antenna for controlling radiation of plurality of random incoherent single-photon emitters

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Embodiment 1

[0030] Ring cavity nanoantenna structure based on high refractive index dielectric Si, the specific structure is as follows figure 1 As shown, among them: 1 is Si ring-cavity nanoantenna; 2 is PMMA matrix; 3 is SiO 2 Substrate whose refractive index is consistent with PMMA; 4 is InP quantum dot with intrinsic quantum efficiency of 1. And a number of randomly arranged and irrelevant InP quantum dots filled the entire Si cavity.

[0031] like figure 2 As shown, multiple resonant modes can be seen appearing in the extinction spectrum. This Si ring-cavity nano-antenna 1 and the environment matrix 2 PMMA have a large refractive index difference, which can generate multiple strong resonance modes, which can be coupled with the excitation band and emission band used for InP quantum dots 4 to enhance its radiation intensity.

[0032] In this embodiment, the Si ring-cavity nano-antenna 1 is designed for InP quantum dots with an excitation wavelength of 500 nm and an emission wavel...

Embodiment 2

[0035] Ring cavity nanoantenna structure based on high refractive index dielectric Si, the structure is as follows figure 1 As shown, among them: 1 is Si ring-cavity nanoantenna; 2 is PMMA matrix; 3 is SiO 2 Substrate; 4 is InP quantum dots with an intrinsic quantum efficiency of 1, an excitation wavelength of 500nm, and an emission wavelength of 655nm; a layer of InP quantum dots with a thickness of 20nm containing multiple randomly arranged incoherent InP quantum dots is placed at the bottom of the Si cavity.

[0036] Wherein, the spectrum elimination, resonant mode, and electromagnetic field enhancement of Si ring-cavity nano-antenna 1 are consistent with Embodiment 1, such as figure 2 shown.

[0037] like Figure 4 Shown is the calculated overall far-field pattern of all incoherent InP quantum dots with a thickness of 20 nm at the bottom of the cavity of the Si ring cavity nanoantenna 1 and the radiation enhancement factor relative to the case without nanoantennas. It ca...

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Abstract

The invention discloses a ring cavity nanometer antenna for controlling radiation of a plurality of random incoherent single-photon emitters. The ring cavity nanometer antenna comprises a substrate and a plurality of ring cavity-shaped nanometer antennas, wherein the ring cavity-shaped nanometer antennas are of cylindrical structures, a cavity is formed in a middle part of each cylindrical structure and is filled with a single or a plurality of incoherent single-phone emitter(s), and the ring cavity nanometer antennas are integratedly placed in an environmental substrate. By the ring cavity nanometer antenna, a plurality of resonant modes can be generated, the stimulation frequency band and the emission frequency band of the single-photon emitters are simultaneously coupled, the stoke-shift of different single-photo emitters is met, and the radiation strength of the single-photon emitters can be greatly improved; by the antenna structure, the radiation direction and the angle diffusion size of each single-photon emitter can be controlled, and the light collection and utilization efficiency is improved; the antenna structure is not dependent on polarization arrangement of the single-photon emitters, and the plurality of incoherent single-photon emitters can be controlled; and the ring cavity nanometer antenna can be widely applied to the relevant fields of single-molecule precision micronano sensors, micronano single-photon sources, quantum communication and the like.

Description

technical field [0001] The invention relates to single-molecule precision micro-nano sensing, micro-nano single-photon source (single-photon source), quantum communication and other related fields, in particular to a ring-cavity nano-antenna that regulates the radiation of multiple random incoherent single-photon emitters. Background technique [0002] A single-photon emitter is a photon source that can generate light of a single frequency or color after being excited by external energy. Commonly used single-photon emitters include single atoms, organic fluorescent molecules, and quantum dots. The size of the single photon emitter itself is much smaller than the wavelength, and it can mark substances at the molecular or even atomic scale, achieving detection accuracy that cannot be achieved by traditional optical devices. At the same time, the surface chemical properties of some single-photon emitters (especially organic fluorescent molecules and quantum dots) can be specif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q1/50H01Q15/08
CPCH01Q1/36H01Q1/50H01Q15/08
Inventor 孙松李沫
Owner INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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