33results about How to "Low photon energy" patented technology

The invention provides a terahertz medical imager based on metamaterials and a manufacturing method thereof. The imager at least comprises a multi-spectrum large-array terahertz detector based on metamaterials. The terahertz detector comprises a silicon wafer substrate with a cavity, a first dielectric layer formed on the front face of the silicon wafer substrate, a second dielectric layer suspended on the cavity, a metamaterial terahertz harmonic oscillator array suspended on the cavity, and a lead structure formed on the surface of the first dielectric layer and electrically connected with the metamaterial terahertz harmonic oscillator array. The multi-spectrum large-array terahertz detector based on the metamaterials is used for detecting terahertz waves reflected or transmitted from an imaged sample, and object reconstruction is achieved through response signals of the detector. The imager is high in imaging speed, completely harmless to living bodies, high in resolution ratio and capable of achieving real-time structure and function imaging, and is well complementary with an existing mainstream medical imaging method.

This invention relates to a semi-conductor light catalyzer process method by use of non-metal ion blending, which belongs to chemistry compound light catalyzer materials process technique field. The method adopts silicon dioxide and butyl titanate ethanol solution as main materials to generate front parts before reaction SiO2/TiO2, and then airs mixture gas with ammonia gas and argon gas for nitrogen blending reaction to process the semi-conductive light catalyzer SiO2/TiO2-xNx powder.

The invention relates to the technical field of artificial turfs, in particular to a non-contact permanent antibacterial artificial turf and a manufacturing process thereof. The artificial turf comprises gum and artificial grass silk, the gum and the artificial grass silk respectively contain inorganic antibacterial powder, and the inorganic antibacterial powder is composed of talcum powder and lanthanide series rare earth oxide; the lanthanide series rare earth oxide is a trace element, the inorganic antibacterial powder can radiate electromagnetic waves with the frequency of 0.4 THz-2. 0THz under the irradiation of heat rays, and the inorganic antibacterial powder of the artificial turf can effectively sterilize in a manner of not contacting bacteria and has the advantage of permanent antibacterial property.

A detector for gas chromatography using two ionization sources within a single body to separately provide ionization energy to a column gas eluent to provide electrical discharge to two or more collecting electrodes provides improved selectivity and may be so used. Use is made of combined bias/collecting electrodes. The use of two ionization sources permits generation of two detector outputs from within a common body and of a common constituent flow. The ionization sources and any applicable discharge gas and dopant may be selected based on desired selectivity.

The invention relates to a terahertz sensor which comprises a cover layer and a substrate. The cover layer and the substrate are oppositely arranged. A metal micro-structure array is arranged on the surface, opposite to the substrate, of the cover layer, a metal reflecting mirror surface is arranged on the surface, opposite to the cover layer, of the substrate, and there is a gap between the metal micro-structure array and the metal reflecting mirror surface. A micro-flow channel is formed in the gap between the cover layer and the metal reflecting mirror surface, the micro-flow channel is used for accommodating a liquid sample to be detected, and the height of the micro-flow channel is micron-sized. According to the invention, the metal micro-structure array is used as a metamaterial, a metamaterial wave absorber is formed by the metal micro-structure array, the metal reflecting mirror surface and the gap between the metal microstructure array and the metal reflecting mirror surface, and quantitative and qualitative detection of a liquid sample is realized by utilizing the characteristics that the metamaterial is very sensitive to the change of the dielectric property of the surrounding environment and the resonance of a local electromagnetic field is remarkably enhanced by a Fabry-Perot resonant cavity of the metamaterial wave absorber and the unique properties of terahertz waves such as low photon energy, strong penetrability, and fingerprint spectrum characteristic.

In one embodiment, the present disclosure provides a deep ultraviolet laser generation device 1000 having a first laser source 100 at a first wavelength between 1.87 μm and 2.1 μm, a second laser source 200 at a second wavelength between 1.53 μm and 1.57μm, a nonlinear wavelength conversion element 3 for generating near-infrared light 31 at a wavelength between 841 nm and 899 nm through a sum-frequency mixing (SFM) process, a nonlinear wavelength conversion element 4 for generating blue light 41 at a wavelength between 420 nm and 450 nm from the near-infrared light through a second harmonic generation (SHG) process, and a third nonlinear wavelength conversion element 5 for generating deep ultraviolet light 51 at a wavelength between 210 nm and 225 nm from the blue light, through another SHG process. The first laser source may be a thulium-doped laser source or a thulium-doped fiber source, and the second laser source may be a semiconductor laser source, an erbium-doped fiber source, or an erbium/ytterbium-doped fiber source.

The invention relates to the technical field of artificial turfs, in particular to an artificial turf with terahertz frequency electromagnetic waves and a manufacturing process thereof. The artificial turf comprises quartz powder-loaded lanthanide series rare earth oxide, and gum and artificial grass silk in the artificial turf respectively contain the quartz powder-loaded lanthanide series rare earth oxide. The quartz powder loaded lanthanide rare earth oxide is composed of 99%-99.9% of quartz powder and 0.1%-1% of lanthanide rare earth oxide, and the frequency of the terahertz frequency electromagnetic wave is 0.3 THz-2. 5 THz. The artificial turf can effectively degrade harmful gases such as formaldehyde, benzene, hydrogen sulfide and ammonia gas in the artificial turf, and has the advantages of being good in removal effect, long in time effect and free of pollution.

A solar concentrating utilization system comprises a plurality of photovoltaic reflecting plates which are arranged in a specific shape and/or arrangement to form a concentrating device, and each photovoltaic reflecting plate is used for absorbing part of sunlight for photovoltaic power generation and reflecting other sunlight which is not absorbed by the photovoltaic reflecting plate or totally reflecting the sunlight; and a concentrating spectrum utilization device which is arranged at or near the focus of the concentrating device formed by the plurality of photovoltaic reflecting plates andis used for utilizing the sunlight reflected by the photovoltaic reflecting plates. According to the system, the solar spectrum suitable for being used by the photovoltaic cell in the solar spectrumis used by the photovoltaic cell, and the sunlight of the residual solar spectrum is gathered to the concentrated spectrum utilization device, so that the full-spectrum utilization of solar energy isrealized. And the energy ratio of photovoltaics to condensation can be adjusted, optimal matching is carried out according to a utilization method, and the overall utilization efficiency of solar energy is improved.

The invention discloses a detection method for potassium sorbate in wheat flour and relates to the technical field of quality control and quality safety of agricultural products/foods, aiming at solving the problems in the prior art that a detection process is complicated and difficult and the consumed time is long. The method comprises the following steps: obtaining a potassium sorbate and wheat flour mixture sample; determining an absorption spectrum of the sample by adopting a terahertz time-domain spectroscopy system; according to the absorption spectrum, determining an absorption coefficient of a characteristic absorption peak of the sample; according to the absorption coefficient of the characteristic absorption peak of the sample, determining a concentration value of the potassium sorbate in the sample through a relation between the absorption coefficient of the characteristic absorption peak of the sample and the concentration of the potassium sorbate in the sample. Compared with the prior art, the method has the characteristics of simplicity in detection and short detection time; the detection method is a safe, efficient and high-precision nondestructive testing method.

A detector for gas chromatography using two or more ionization sources within a single body to separately provide ionization energy to a column gas eluent to provide electrical discharge to two or more collecting electrodes provides improved selectivity and may be so used. Use is made of combined bias/collecting electrodes or of sets of separated bias and collecting electrodes. The use of multiple ionization sources permits generation of multiple detector outputs from within a common body and of a common constituent flow. The ionization sources and any applicable discharge gas and dopant may be selected based on desired selectivity.

The invention relates to a distance sensor module, a mobile terminal, a distance detection method and device and a storage medium. The distance sensor module is arranged below a screen of the mobile terminal. The distance sensor module comprises a light emitter, a light receiver, an analog front end, an analog-digital converter and a micro-control unit. The method comprises the steps of: controlling the light receiver to generate a light signal after receiving reflected detection light emitted by the light emitter, wherein the detection light is detection light with the wavelength larger than1,300 nm; controlling the optical receiver to convert the optical signal into a first current signal; executing processing conversion on the first current signal to obtain a digital signal; and controlling the micro-control unit to detect the distance according to the digital signal. Because the wavelength of the detection light is increased and the frequency is reduced, the photon energy in the detection light is low, and the problem that the detection light is excited in the mobile terminal screen to generate bright spots is further solved.

The invention discloses a detection device for ovarian epithelial malignant tumor. The device comprises a tunable terahertz source, a first optical fiber, a polarizing spectroscope, a confocal lens, aplanoconvex lens, a window, a reflecting mirror, a second optical fiber, a terahertz spectrometer and a computer; the optical input end of the first optical fiber is connected with the optical outputend of the tunable terahertz source, and the optical output end of the first optical fiber is connected with the optical input end of the polarizing spectroscope; the optical input end of the secondoptical fiber is connected with the optical output end of the reflecting mirror, and the optical output end of the second optical fiber is connected with the optical input end of the terahertz spectrometer; the data output end of the terahertz spectrometer is connected with the data input end of the computer through a cable. The detection device adopts the tunable terahertz source as an emission source, and focuses terahertz waves to the ovarian surface through the combination of a plurality of lens for detection, requirements for a detection operation environment are low, the device has no side effects on the human body, and the detection result has high accuracy.

The invention relates to the technical field of artificial turfs, in particular to a mosquito-repelling artificial turf and a manufacturing process thereof. The artificial turf comprises mosquito-repelling powder, gum and artificial grass are filled with the mosquito-repelling powder, and the mosquito-repelling powder can emit mosquito-repelling electromagnetic waves with the frequency ranging from 0.5-1.5 THz under irradiation of heat rays. The mosquito-repelling artificial turf uses weak electromagnetic waves to simulate the discharge phenomenon when natural lightning occurs to repel mosquitoes, and has the advantages of being good in mosquito-repelling effect, non-toxic and environment-friendly.

The invention discloses a pipeline mixed oil monitoring system based on terahertz frustrated total internal reflection, relating to the field of pipeline detection. The system comprises an emitter anda receiver, wherein the emitter and the receiver are placed in an insulating layer and are in direct contact with a terahertz frustrated total internal reflection prism sensor and only allow terahertz waves to penetrate through a terahertz window; the terahertz waves emitted by the emitter pass through the terahertz window, are reflected to a left-side incident plane of the total internal reflection prism sensor and are refracted and reflected, and the refracted waves enter the sensor; the terahertz waves are transmitted in the sensor so as to generate a frustrated total internal reflection phenomenon on the surface, in contact with an oil product, of the sensor; the terahertz waves emergent from a right-side emergent plane of the total internal reflection prism sensor carry feature information of the passing oil product; and the emergent terahertz waves pass through the terahertz window again and are received by the receiver, generated electric signals are acquired by a terahertz instrument through a cable, and then a terahertz frustrated total internal reflection spectrum of the oil product is obtained.