34results 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.

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.

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.

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.