Abstract: A compact six-port Photonic Crystal (PhC) circulator includes a hexagonal PhC branch waveguide and six waveguide ports, wherein six PhC branch waveguides respectively correspond to the six waveguide ports, and the six waveguide ports respectively are symmetrically distributed at the periphery of PhCs. One second dielectric material column is arranged at the center of the hexagonal PhC waveguide. Six identical magneto-optical material columns respectively are arranged at first adjacent positions of the second dielectric material column. Six identical third dielectric material columns respectively are arranged at second adjacent positions of the second dielectric material column. An electromagnetic signal is inputted from any one of the waveguide ports and is outputted from the next waveguide port adjacent thereto, while the remaining waveguide ports are in a signal isolated state, thus forming unidirectional circular transmission.

Abstract: A reactive antibacterial compound and a preparation method thereof are provided herein. The reactive antibacterial compound is represented by the general formula (I) or (II): wherein R1 represents OCN-L-NHCOOR?, OCN-L-NHCONHR?, OCN-L-NHCOSR?, OCN-L-COOR?, or OCN-L-COONHR?. G1 represents OCN-M-NHCOOG?, OCN-M-NHCONHG?, OCN-M-NHCOSG?, OCN-M-COOG?, or OCN-M-COONHG?. L, M, R? and G? independently for each occurrence represent divalent alkyl and cycloalkyl having from 1 to 18 carbon atoms, optionally substituted by up to 18 heteroatoms. R4 and G4 independently for each occurrence represent a divalent alkyl and cycloalkyl having from 1 to 18 carbon atoms, optionally substituted by at most 18 heteroatoms. G2 and G3 independently for each occurrence represent —H, —F, —Cl, —Br, —I, —OCH3, —OCH2CH3, —OPr, —CN, —SCN, —NO, —NO2, a monovalent unsubstituted or substituted alkyl, cycloalkyl, or aryl having from 1 to 7 carbon atoms. Z and X independently for each occurrence represent —COO, —SO3, or —OPO2OR5.

Abstract: The present invention provides a tunable optical frequency converter based on an ultrasonic grating, which includes a laser, a first optical isolator, and a circulating frequency shift module. Said circulating frequency shift module is composed of an optical coupler, an ultrasonic grating, a lens group, an optical amplifier, a second optical isolator, a first optical circulator, a fiber Bragg grating, a second optical circulator, a tunable filter and a tunable attenuator. Light outputted by said laser is inputted to said circulating frequency shift module to conduct frequency shifting repeatedly after passing through the first optical isolator, and then separated by a tunable filter and a second optical circulator, then frequency converted light is outputted from the port of the circulating frequency shift module.

Abstract: For the thin-film thermo-electric generator and fabrication method of this invention, a P-type thermo-electric thin-film layer, an insulating thin-film layer and a N-type thermo-electric thin-film layer is deposited on a substrate to form a three-layer PN junction, multiple three-layer PN junctions in series are available, an insulating thin-film layer is provided between every to serial three-layer PN junctions, and electrodes are extracted from the substrate and the outermost thin-film layer of the last three-layer thin-film PN junctions.

Abstract: A chloride ion fluorescence detection method and device, and a use thereof. The chloride ion fluorescence detection method utilizes chloride ions to influence luminescence characteristics of some photoluminescent substances to change the emission spectrum of the photoluminescent substances. The concentration of the chloride ions is detected through two processes comprising the fiber surface film forming and test liquid preparation of a fluorescent reagent sensitive to the chloride ions and measurement of information of fluorescence peak wavelengths or intensities. The method can be applied to the online assessment of the corrosion environment of steel bar concrete or the measurement of chloride ions in a laboratory.

Abstract: The present invention discloses a TE-polarization splitter based on a photonic crystal waveguide, comprising a waveguide formed in a photonic crystal with a complete photonic bandgap, wherein after the incident wave with any polarization direction is inputted into the polarization splitter via the input port of the photonic crystal waveguide. TE wave is outputted from the output port of the polarization splitter, while the TM wave is reflected from the input port of the polarization splitter. The structure of the present invention has a small volume, high degree of polarization, high light transmission efficiency, and it is suitable for large-scale optical integrated circuits and can realize the polarization beam splitting function for different wavelengths.

Abstract: A photonic crystal waveguide T-polarization beam splitter, comprising a photonic crystal waveguide with a completely forbidden band; after the input end (1) of the photonic crystal waveguide inputs an incident wave in any polarization direction into the polarization beam splitter, a TE component is outputted from a TE output end (2), and a TM component is outputted from the TM output end (3) of the beam splitter. The polarization beam splitter has a small size, high polarization and high light transmission efficiency, facilitates integration and has high efficiency, is suitable for large scale optical path integration, and achieves the functions of polarizing and beam splitting for different wavelengths.

Abstract: A chloride ion fluorescence detection method and device, and a use thereof. The chloride ion fluorescence detection method utilizes chloride ions to influence luminescence characteristics of some photoluminescent substances to change the emission spectrum of the photoluminescent substances. The concentration of the chloride ions is detected through two processes comprising the fiber surface film forming and test liquid preparation of a fluorescent reagent sensitive to the chloride ions and measurement of information of fluorescence peak wavelengths or intensities. The method can be applied to the online assessment of the corrosion environment of steel bar concrete or the measurement of chloride ions in a laboratory.

Abstract: For the present invention, a P-type thermo-electric thin-film layer and a N-type thermo-electric thin-film layer are respectively deposited on two sides of an insulating substrate. During the deposition, the P-type thermo-electric thin-film layer and the N-type thermo-electric thin-film layer are deposited and connected on the same exposed side of the insulating substrate, and then a PN junction is formed. This method makes the fabrication simplified without special process for connecting the P-type thermo-electric thin-film layer and the N-type thermo-electric thin-film layer. Due to the features of thin-film thermo-electric material, the performance of thermo-electric generator is improved. During the deposition, the P-type thermo-electric thin-film layer and the N-type thermo-electric thin-film layer are deposited and connected on the exposed side of the insulating substrate, so welding is not required in this heating surface side.

Abstract: The invention relates to a photonic crystal magneto-optical circulator, which comprises first dielectric material columns in an air background, wherein the first dielectric material columns are arranged in the form of two-dimensional square lattice.

Abstract: The invention relates to a photonic crystal four-port circulator based on the coupling of magneto-optical cavities, which comprises two same magneto-optical cavities and three waveguides which are symmetrically distributed on the periphery of each magneto-optical cavity, wherein two waveguides connected with the magneto-optical cavities respectively are in a “v-shaped” arrangement, thereby guaranteeing that waveguides which are connected with the left sides of the two magneto-optical cavities are parallel to each other and waveguides which are connected with the right sides of the two magneto-optical cavities are parallel to each other as well and achieving the high-efficiency transmission in the case of the coupling of the magneto-optical cavities.

Abstract: Taught is a photonic crystal three-port circulator, which comprises a dielectric background material and a plurality of first air columns which are symmetrically arranged in the form of triangular lattice in the dielectric background material. The photonic crystal three-port circulator also comprises a magneto-optical cavity and three waveguides, wherein the magneto-optical cavity is arranged at the center of the photonic crystal three-port circulator; the three waveguides are symmetrically distributed around the magneto-optical cavity; and each waveguide comprises a waveguide port which is arranged at the position in the waveguide far away from the magneto-optical cavity. The photonic crystal three-port circulator realizes circular light transmission in single rotational direction from any one of the waveguide ports to another next to it, has a simple and compact structure, and can be easily integrated with other photonic crystal devices.

Abstract: The present invention relates to the field of organic synthesis, and provides an organosilicon betaine type antimicrobial compound having a general formula I and preparation thereof: the antimicrobial compound provided by the present invention has a reactive functional group—siloxane, which can be subjected to chemical bonding with many material interfaces, thereby endowing a material or article surface treated with the antimicrobial compound I persistent antimicrobial activity. Also, the preparation of the compound has a simple process and easily controlled conditions, and is easy to be industrialized, which facilitates its wide applications.

Abstract: A self-repairing concrete includes urea-formaldehyde resin polymer micro-capsules, in which the urea-formaldehyde resin polymer micro-capsules are mixed for a fixed function of micro-cracks. The quality mixture ratio is: concrete/micro capsules/water=100:1-15:15-50. The manufacturing method is weighing a full amount of water in a container, adding urea-formaldehyde resin polymer micro-capsules, stirring, until fully dispersed microcapsules; pouring the water into the mixing container, adding the corresponding quality of cement; stirring; adding sand and gravel filling materials, conducting worksite watering, ? volume for each time, vibrating, and air exhausting; until the paste filling mold.

Abstract: A self-repairing concrete includes carbamide resin polymer micro-capsules, in which the carbamide resin polymer micro-capsules are mixed for a fixed function of micro-cracks. The quality mixture ratio is: concrete/micro capsules/water=100:1-15:15-50. The manufacturing method is weighing a full amount of water in a container, adding carbamide resin polymer micro-capsules, stirring, until fully dispersed microcapsules; pouring the water into the mixing container, adding the corresponding quality of cement; stirring; adding sand and gravel filling materials, conducting worksite watering, ? volume for each time, vibrating, and air exhausting; until the slurry filling mold.

Abstract: An optical-deflection accelerating device is provided. The device comprises an incident light source for generating an incident light-beam with a deflection speed, an emergent-light capturing device for capturing an emergent light-beam, and a reflective device which is a curved-surface reflective mirror for reflecting the incident light-beam to the emergent-light capturing device. When the incident light-beam enters to a reflective point on the curved-surface reflective mirror in sequence, an incident angle and a reflective angle are altered with locations of the reflective point on the curved-surface reflective mirror, and are increased with an increased curvature of the reflective point. When the incident light-beam is deflected with a tiny initial deflection angle, the reflective light-beam is deflected therewith and the deflection angle is enlarged. The curvature of the curved-surface reflective mirror can be adjusted to obtain different accelerated deflections.

Abstract: For the present invention, a P-type thermo-electric thin-film layer and a N-type thermo-electric thin-film layer are respectively deposited on two sides of an insulating substrate. During the deposition, the P-type thermo-electric thin-film layer and the N-type thermo-electric thin-film layer are deposited and connected on the same exposed side of the insulating substrate, and then a PN junction is formed. This method makes the fabrication simplified without special process for connecting the P-type thermo-electric thin-film layer and the N-type thermo-electric thin-film layer. Due to the features of thin-film thermo-electric material, the performance of thermo-electric generator is improved. During the deposition, the P-type thermo-electric thin-film layer and the N-type thermo-electric thin-film layer are deposited and connected on the exposed side of the insulating substrate, so welding is not required in this heating surface side.

Abstract: A new camera bellows of a rotating-mirror framing camera, without principle errors such as defocusing error of imaging points, non-uniform photographic frequency and each axial chief ray of exit-pupil and the corresponding relay lens being different with a corresponding reflective optical axis, is provided. This kind of camera bellows is carried out through centers of the exit-pupil diaphragms being disposed on a cylindrical surface aligned with a first Pascal spiral line, and principal points of the relay lenses of the relay lens array and the image recording surface being disposed on cylindrical surfaces aligned with second and third Pascal spiral lines respectively. The bellows is mainly composed of a box, and an aperture diaphragm, a field lens, a rotating mirror, a relay lens array, an exit-pupil diaphragm array and a record image surface.

Abstract: A differential phase-contrast X-ray imaging system is provided. Along the direction of X-ray propagation, the basic components are X-ray tube, filter, object platform, X-ray phase grating, and X-ray detector. The system provides: 1) X-ray beam from parallel-arranged source array with good coherence, high energy, and wider angles of divergence with 30-50 degree. 2) The novel X-ray detector adopted in present invention plays dual roles of conventional analyzer grating and conventional detector. The basic structure of the detector includes a set of parallel-arranged linear array X-ray scintillator screens, optical coupling system, an area array detector or parallel-arranged linear array X-ray photoconductive detector. In this case, relative parameters for scintillator screens or photoconductive detector correspond to phase grating and parallel-arranged line source array, which can provide the coherent X-rays with high energy.

Abstract: Taught is a high sensitivity THz detector and camera comprising an integration body of a photonic crystal THz micro-cavity and semiconductor transistor on a semiconductor base. The THz signal is localized inside of the photonic crystal micro-cavity so as to generate high intensity field in the micro-cavity. The heat effect of the THz wave therein produces electron-hole pairs in the semiconductor. The current carrier is injected into the base electrode of the transistor and is amplified therein to produce signal current in the external circuit and thus high sensitive THz signal detection is realized. Integrating many such detectors together to construct a THz resonant cavity array, each resonant cavity only receives THz light from a certain position and having certain intensity. The signal is converted and then stored to obtain a complete THz image so as to realize imaging in real-time. Special signal amplification circuit is used to eliminate THz background radiation noise.