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.

The invention relates to a device and method for diagnosing the dynamic response of a metal material. A nanosecond laser beam emitted by a nanosecond laser source in the diagnosis device irradiates the upper surface of a to-be-detected metal sample; a picosecond laser beam emitted by a picosecond laser beam source irradiates a metal microwire backlight target to generate an X-ray source, and the X-ray source is used for carrying out X-ray diffraction imaging on the dynamic response process of the to-be-detected metal sample. A DXRD diagnosis package comprises a shielding module and an IP imaging plate, the IP imaging plate is used for recording imaging data after X-ray diffraction imaging, and the shielding module is used for shielding the influence of stray light in a backlight source ondiffraction imaging of the to-be-detected metal sample; and imaging data recorded by the IP imaging plate are used for analyzing related characteristics of the to-be-detected metal sample. According to the invention, the space-time resolution can be improved, and the diagnosis of the material dynamic response of the high-Z metal is realized.

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 provides a spectrum and light intensity collaborative optimization solar full-spectrum complementary utilization device. The device comprises a light condensation assembly for gatheringsunlight, a frequency division assembly which is located on a light condensation line of the light condensation assembly and divides an incident light source into a first light beam for the efficientutilization of a photovoltaic cell and a second light beam used according to conditions, a reactor which is positioned at or near the focal point of the light path of the second light beam separated by the frequency division assembly, is used for receiving the second light beam separated by the frequency division assembly, and is also used as a place for preparing a reaction product, and a photovoltaic cell which is positioned at or near the focus of the light path of the first light beam separated by the frequency division assembly, and is used for receiving the first light beam separated bythe frequency division assembly and generating power for utilization. The first light beam is converted into electric energy through the photovoltaic cell, and the remaining second light beam is converted into heat energy or other forms of energy through the reactor according to the reaction type, so that the full-spectrum utilization and gradient utilization of solar energy are realized.

A Two-Photon Laser Assisted Device Alteration technique is presented. Fault localization is investigated by exploiting the non-linear two-photon absorption mechanism to induce LADA effects. Femtosecond laser pulses of wavelength having photon energy lower than the silicon band gap are directed at the area of interest, while the DUT is stimulated with test vectors. The laser pulses are synchronized to the DUT stimulation, so that switching timing can be altered using the two-photon absorption effect.

The invention discloses a terahertz detection robot. The terahertz detection robot comprises a terahertz transmitting robot and a terahertz detection robot which are in wireless communication connection, the terahertz emission robot is used for emitting terahertz waves to a to-be-detected object. The terahertz detection robot is used for detecting terahertz information of the to-be-detected objectafter receiving the terahertz waves and analyzing the to-be-detected object according to the terahertz information. The terahertz transmitting robot and the terahertz detecting robot perform bidirectional data exchange through a wireless network communication system, so that the terahertz transmitting robot and the terahertz detection robot achieve delay-free alignment, multi-angle imaging and other cooperative operations. Terahertz can be better in imaging definition in low-density material imaging, photon energy of terahertz waves is far lower than ionization radiation energy of biologicaltissue, the terahertz waves are very safe electromagnetic waves, and therefore the terahertz detection robot is a safe and reliable visual detection technology for detection.

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.

The invention discloses a terahertz quasi-optical detection device for realizing nondestructive detection on internal structures of non-metallic materials such as PE and further provides a non-metallic pipeline detection system and method for realizing detection on a non-metallic pipeline. The non-metallic pipeline detection system comprises a terahertz quasi-optical detection device, an upper computer and a displacement control device. The terahertz quasi-optical detection device comprises a primary radiation source module, a frequency multiplier module, a cylindrical lens antenna, a terahertz detector, a signal control processing module and a radiation antenna module. The terahertz technology is adopted, non-metallic pipeline materials such as PE can be easily penetrated, the internal structure of the nonmetal pipeline materials can be detected, the detection device and system can distinguish millimeter-sized defects, the wavelength is far larger than that of rays, photon energy is low, and ionizing radiation to the human body is avoided.

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.

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 1.57 μm, 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 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.

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 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 relates to a method for detecting the concentration of micro-plastics in water by using a near-infrared 1550nm laser. The method comprises the following steps: (1) preparing n parts of series micro-plastic water suspension standard solutions with different concentrations from micro-plastic particles by using a dispersion method, and uniformly distributing the concentrations of the series micro-plastic water suspension standard solutions within 0.02-0.12 mg / mL; (2) performing a diffraction experiment on the series of micro-plastic water suspension standard solutions prepared in the step (1) at a laser wavelength of 1550 nm to obtain a diffraction image, and recording the number of rings in the diffraction image to obtain a corresponding relationship between the concentration of the micro-plastic water suspension and the number of rings; and (3) carrying out the same diffraction experiment on the to-be-detected micro-plastic water suspension to obtain the ring number of thediffraction image, and obtaining the micro-plastic concentration of the to-be-detected micro-plastic water suspension according to the corresponding relationship between the concentration and the ring number under the wavelength. The detection method is simple and efficient, and the concentration of the micro-plastic in the water can be detected in a short time.

The invention provides a method for restoration of a dielectric K value. The method at least includes the following steps: 1) providing a substrate and forming a dielectric layer on the substrate; 2) etching a plurality of grooves in the dielectric layer and cleaning and removing etching residues; 3) adopting microwaves to irradiate the dielectric layer which undergoes the etching. The method for restoration of the dielectric K value makes use of strong microwave-absorbing property of water to remove moisture in the dielectric layer so as to restore the K value of the dielectric layer; and that the energy gap of the dielectric layer is far larger than photon energy of the microwaves is used so that the microwaves are not absorbed and a problem of damage of the dielectric layer is prevented.

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.

A method for detecting the concentration of microplastics in water using a near-infrared 1550nm laser, (1) using microplastic particles to prepare n series of microplastics water suspension standard solutions with different concentrations through a discrete method, and the concentration of the series of microplastics water suspension standard solutions Evenly distributed within 0.02 ~ 0.12 mg / mL; (2) Use the series of microplastic water suspension standard solutions prepared in step (1) to conduct diffraction experiments at a laser wavelength of 1550 nm to obtain a diffraction image and record the number of rings in the diffraction image , obtain the corresponding relationship between the concentration and ring number of the microplastic aqueous suspension; (3) Conduct the same diffraction experiment on the microplastic aqueous suspension to be measured to obtain the ring number of the diffraction image, and then based on the corresponding relationship between the concentration and the ring number at this wavelength , to obtain the microplastic concentration of the microplastic aqueous suspension to be measured. The detection method is simple and efficient, and can detect the concentration of microplastics in water in a short time.

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.

The invention discloses a far-infrared detection method of drugs. The drugs comprise cocaine, ketamine hydrochloride, cannabinol, morphine and heroin. The far-infrared detection method of the drugs comprises the following steps that 1, standard substance samples of the drugs are prepared; 2, the far-infrared detection technology is used for detecting standard substances of the drugs and constructing a standard dactylogram library; and 3, the constructed standard dactylogram library is used for detecting unknown objects. According to the far-infrared detection method of the drugs, the far-infrared detection technology is used for constructing the fingerprint spectrum library of the five drugs, and the dactylogram library is used for quickly detecting whether the unknown objects are the drugor not. Far-infrared wave photons are low in energy and high in penetrating power, and do not cause harm to a human body, and nondestructive detection can be realized.

The invention provides a method for restoration of a dielectric K value. The method at least includes the following steps: 1) providing a substrate and forming a dielectric layer on the substrate; 2) etching a plurality of grooves in the dielectric layer and cleaning and removing etching residues; 3) adopting microwaves to irradiate the dielectric layer which undergoes the etching. The method for restoration of the dielectric K value makes use of strong microwave-absorbing property of water to remove moisture in the dielectric layer so as to restore the K value of the dielectric layer; and that the energy gap of the dielectric layer is far larger than photon energy of the microwaves is used so that the microwaves are not absorbed and a problem of damage of the dielectric layer is prevented.

A solar energy concentration and utilization system. The solar energy concentration and utilization system includes: a plurality of photovoltaic reflection panels, which are formed in a specific shape and / or arrangement to form a concentration device. Each photovoltaic reflection panel is used to absorb part of the sunlight for photovoltaic processing. Generate electricity, while reflecting other sunlight that has not been absorbed by the photovoltaic reflective panels, or completely reflecting sunlight; a concentrating spectrum utilization device is placed at or near the focus of the concentrating device formed by the plurality of photovoltaic reflective panels for utilization The photovoltaic reflective panels reflect sunlight. This system realizes the full spectrum utilization of solar energy by utilizing the solar spectrum suitable for photovoltaic cells in the solar spectrum through photovoltaic cells, and concentrating the remaining solar spectrum to the concentrating spectrum utilization device. And the energy ratio of photovoltaic and concentrated light can be adjusted to optimally match according to the utilization method to improve the overall utilization efficiency of solar energy.

The invention discloses a linear terahertz ellipsometer using visible light for calibration and a thickness measurement method, and belongs to the technical field of ellipsometry thickness measurement. A linear system is designed by using a terahertz Gaussian beam and an ellipsometry thickness measurement method, and the system is calibrated by using visible light, so that the positions of a reflector and a sample table can be conveniently adjusted, and the defect that terahertz waves are invisible and difficult to adjust is overcome.