阅读说明：本技术 一种利用回音壁模式光学微腔的电离装置及方法 (Ionization device and method using whispering gallery mode optical microcavity ) 是由 黄民双 宋晓鹏 钱杨 于 2019-09-27 设计创作，主要内容包括：本发明公开了一种利用回音壁模式光学微腔的电离装置及方法,包括石英光学池(1)、回音壁模式光学微腔群(2)与纯净水(3)；所述的石英光学池(1)内底部高设有等离子体放电区域,所述的回音壁模式光学微腔群(2)设于等离子体放电区域,石英光学池(1)内加纯净水(3),纯净水(3)液面高于回音壁模式光学微腔群(2)上表面；光能(4)由石英光学池(1)上方射入纯净水(3)内的回音壁模式光学微腔群(2)中；所述的回音壁模式光学微腔群(2)包括多个不同直径的石英微球；不同直径的石英微球的直径范围包括光能(4)的波长范围。操作简单、成本低廉、使用方便可靠,能有效提高处理效率,实现水中放电持续产生稳定的等离子体。(The invention discloses an ionization device and method utilizing a whispering gallery mode optical microcavity, which comprises a quartz optical pool (1), a whispering gallery mode optical microcavity group (2) and purified water (3); a plasma discharge area is arranged at the bottom in the quartz optical pool (1), the whispering gallery mode optical microcavity group (2) is arranged in the plasma discharge area, purified water (3) is added into the quartz optical pool (1), and the liquid level of the purified water (3) is higher than the upper surface of the whispering gallery mode optical microcavity group (2); light energy (4) is emitted into the whispering gallery mode optical microcavity group (2) in the purified water (3) from the upper part of the quartz optical pool (1); the whispering gallery mode optical microcavity group (2) comprises a plurality of quartz microspheres with different diameters; the diameter range of the quartz microspheres with different diameters comprises the wavelength range of the light energy (4). The method has the advantages of simple operation, low cost, convenient and reliable use, and can effectively improve the treatment efficiency and realize the continuous generation of stable plasma by the discharge in water.)

1. An ionization device using whispering gallery mode optical microcavities, comprising: comprises a quartz optical pool (1), a whispering gallery mode optical microcavity group (2) and purified water (3);

a plasma discharge area is arranged at the bottom in the quartz optical pool (1), the whispering gallery mode optical microcavity group (2) is arranged in the plasma discharge area, purified water (3) is added into the quartz optical pool (1), and the liquid level of the purified water (3) is higher than the upper surface of the whispering gallery mode optical microcavity group (2); light energy (4) is emitted into the whispering gallery mode optical microcavity group (2) in the purified water (3) from the upper part of the quartz optical pool (1);

the whispering gallery mode optical microcavity group (2) comprises a plurality of quartz microspheres with different diameters; the diameter range of the quartz microspheres with different diameters comprises the wavelength range of the light energy (4).

2. The ionization apparatus using whispering gallery mode optical microcavities of claim 2, wherein: the light energy (4) comprises laser or sunlight.

3. An ionization method using a whispering gallery mode optical microcavity, comprising;

putting a plurality of quartz microspheres with different diameters into an aqueous solution to form a whispering gallery mode optical microcavity;

when light energy is incident into the aqueous solution, light with different wavelengths can be trapped in the quartz microspheres with different diameters to form a stable traveling wave transmission mode, and the light intensity is continuously accumulated and enhanced to reach the set light field intensity;

an electric field in the whispering gallery mode optical microcavity is published along the radius direction to form a whispering gallery mode field, a small part of energy is outside the cavity and exponentially attenuated to form an evanescent field, and the evanescent field of the whispering gallery mode field is used for acting with an aqueous solution to generate ionization.

Technical Field

The invention relates to the technical field of plasma structures, in particular to an ionization device and method utilizing a whispering gallery mode optical microcavity.

Background

The low-temperature plasma method has wide application in the aspects of chemical processes, material treatment, material synthesis, military affairs and the like, and the current method for generating plasma basically adopts a discharge method under the action of a strong electric field, such as glow discharge, corona discharge, dielectric barrier discharge, microwave discharge and the like, but the methods need electric energy. The method of generating plasma by using light energy, particularly solar light energy, is difficult to apply at present because a transparent medium such as an aqueous solution needs a high threshold for laser-induced breakdown. There are two common solutions to this problem, one is to add other chemicals to the aqueous solution to lower the ionization threshold of the aqueous solution, and the other is to use high energy laser, but both of these methods have the problem of very low efficiency.

Disclosure of Invention

The invention aims to provide an ionization device and method utilizing a whispering gallery mode optical microcavity, which are simple to operate, low in cost, convenient and reliable to use, capable of effectively improving treatment efficiency and achieving continuous generation of stable plasma through underwater discharge.

The purpose of the invention is realized by the following technical scheme:

an ionization device utilizing a whispering gallery mode optical microcavity comprises a quartz optical pool 1, a whispering gallery mode optical microcavity group 2 and purified water 3;

a plasma discharge area is arranged at the bottom in the quartz optical pool 1, the whispering gallery mode optical microcavity group 2 is arranged in the plasma discharge area, purified water 3 is added into the quartz optical pool 1, and the liquid level of the purified water 3 is higher than the upper surface of the whispering gallery mode optical microcavity group 2; light energy 4 is emitted into the whispering gallery mode optical microcavity group 2 in the purified water 3 from the upper part of the quartz optical pool 1;

the whispering gallery mode optical microcavity group 2 comprises a plurality of quartz microspheres with different diameters; the range of diameters of the quartz microspheres of different diameters includes the wavelength range of the optical energy 4.

The light energy 4 comprises laser or sunlight.

An ionization method using whispering gallery mode optical microcavities, comprising;

putting a plurality of quartz microspheres with different diameters into an aqueous solution to form a whispering gallery mode optical microcavity;

when light energy is incident into the aqueous solution, light with different wavelengths can be trapped in the quartz microspheres with different diameters to form a stable traveling wave transmission mode, and the light intensity is continuously accumulated and enhanced to reach the set light field intensity;

an electric field in the whispering gallery mode optical microcavity is published along the radius direction to form a whispering gallery mode field, a small part of energy is outside the cavity and exponentially attenuated to form an evanescent field, and the evanescent field of the whispering gallery mode field is used for acting with an aqueous solution to generate ionization.

According to the technical scheme provided by the invention, the ionization device and the ionization method utilizing the whispering gallery mode optical microcavity, which are provided by the embodiment of the invention, have the advantages of simple operation, low cost and convenience and reliability in use, can effectively improve the treatment efficiency, and realize continuous generation of stable plasma by underwater discharge.

This problem is solved in the present example by using a whispering gallery mode optical microcavity. Sound waves can be constantly reflected off a curved, smooth wall surface with very little loss, so that sound can travel a great distance along the wall, an effect known as whispering gallery modes. Similar to the reflection of sound waves on a wall surface, when light enters a light thinning medium from a light dense medium and the incident angle is larger than a critical angle, the light can also be totally reflected on the surfaces of the two media, so that a whispering gallery mode also exists on a curved high-refractive-index medium interface, and the light can be always confined in the cavity to keep a stable traveling wave transmission mode in the boundary of the closed cavity. The intensity of the light in this cavity is built up so that the threshold required for water induced breakdown is reached.

The whispering gallery mode optical microcavity is one kind of micron or submicron optical resonant cavity, and has reflecting, total reflecting, scattering or diffracting effect in discontinuous refractive index interface to limit light in one small area and thus high optical field energy density inside the cavity. The whispering gallery mode optical microcavity has the characteristics of high quality factor, low mode volume and integration, can be used for information processing of biomedical sensing, laser and nonlinear optical light sources and classical integrated optical chips, can also be used for realizing quantum information, quantum calculation and quantum simulation on integrated quantum chips by utilizing the strong interaction of the whispering gallery mode and systems such as atoms, phonons and the like. By using the resonance enhancement effect of the ultrahigh Q value of the microcavity, the threshold value of the nonlinear effect can be reduced to the microwatt magnitude. For example, for a silica microsphere cavity with a diameter of 50 microns and a Q of 108, 1mW of input light can achieve an optical field intensity of 1GW/cm2 in the cavity. This intensity is sufficient to cause breakdown ionization of the aqueous solution.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an ionization apparatus using whispering gallery mode optical microcavity according to an embodiment of the present invention;

fig. 2 is a schematic diagram illustrating the operation principle of an ionization device using an whispering gallery mode optical microcavity according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.