34results about How to "Low photon energy" patented technology

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.

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.

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.

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 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 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.

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.