37results about How to "Achieve polarization" patented technology

The invention discloses a polarized light-emitting diode (LED). An LED chip of the polarized LED comprises a work area consisting of an n-type area, p-type area and a quantum well structure, a substrate, an insulating dielectric film, a transparent electrode and a metal electrode. The polarized LED is characterized in that a raised or embedded grating is prepared on the light-emitting surface of the LED chip, and the grating has the period between 50 and 600 nm, the duty cycle between 0.2 and 0.9 and the thickness between 50 and 400 nm. Compared with the prior LED external polarizer for realizing polarization, the polarized LED adopts a technical proposal of directly integrating and manufacturing a grating structure on the surface of the LED chip and achieving the aim that the emitted light of the LED chip is polarized light with no external polarizer and other structures. Therefore, light-emitting devices are greatly reduced in integral volume, optimized in performances and lower in cost. In addition, the polarized LED can be integrated on a light-emitting chip at a time through a semiconductor lithography process, and is easy to realize industrialization, popularization and application.

The invention provides a polarization and phase entangled coding method and apparatus, and a quantum key distribution system. The method comprises the steps of converting a first photon in a polarization entangled photon pair generated by a polarization entangled light source from a polarization code into a phase code; and forming a polarization and phase entangled photon pair by the first photon with the polarization code converted into the phase code and a second photon in the polarization entangled photon pair. The quantum key distribution system based on the polarization and phase entangled coding apparatus can fully use the transmission advantages of different codes in different channels. When transmission of different channels is realized, the photon is converted from the polarization code to the phase code. Through adoption of the quantum key distribution system, the quantum key distribution demand of the free space and optical fiber mixed channel transmission is met.

The invention relates to a biaxial optical gyroscope, which consists of a surface plasma excimer Y-type mode separator, a Y waveguide integrated optical device, a Y waveguide integrated optical chip, a first polarization-preserving fiber coil, a second polarization-preserving fiber coil, a directional coupler and a detector. The invention belongs to the technical field of integrated optics and inertial sensor, and provides the biaxial optical gyroscope. The biaxial optical gyroscope with a separation mode is realized by adopting waveguide devices made of different materials, and has the advantages of improvement on the utilization rate of light sources, high integrity and the like.

The invention relates to a graphene mid-infrared detector based on phonon exciton enhancement and a preparation method thereof, and belongs to the technical field of mid-infrared detection. The graphene mid-infrared detector comprises a silicon substrate, a silicon dioxide layer, a graphene layer and a molybdenum trioxide micro-nanostructure array covering the graphene layer which are laminated inturn from bottom to top, wherein the molybdenum trioxide micro-nanostructure array and the graphene layer form a phonon exciton enhanced heterostructure; and the edge of the graphene layer is provided with an electrode above, and the electrode extends an overlapping region of the molybdenum trioxide micro-nanostructure array and the graphene layer. In order to solve the technical problems, the graphene mid-infrared detector achieves the purposes of greatly improving the photoelectric conversion efficiency in the mid-infrared band and being simple in preparation method and low in cost.

The invention discloses a coherent layout confinement atomic clock and nuclear magnetic resonance atomic gyroscope integrated system which comprises a three-axis coil, an atomic bubble arranged in the three-axis coil, a signal generator connected with the three-axis coil, a detection light arranged outside the three-axis coil and used for a nuclear magnetic resonance atomic gyroscope, a pumping light used for the nuclear magnetic resonance atomic gyroscope and a chip atomic clock, a second photoelectric detector used for detecting a light inspection signal of the nuclear magnetic resonance atomic gyroscope, and a first photoelectric detector used for detecting a CPT resonance signal of the chip atomic clock, wherein the detecting light is orthogonal to the pumping light, and a first frequency-stabilizing servo loop and a second frequency-stabilizing servo loop are connected between the first photoelectric detector and the pumping light. The coherent layout confinement atomic clock and nuclear magnetic resonance atomic gyroscope integrated system has a great significance for shortening volume, power consumption and weight of a Micro-PNT, is beneficial to improvement of the performance of the chip atomic clock, and is high in practical value.

The invention relates to a method for enhancing photocatalysis performance of a ferroelectric material through regulation and control of spontaneous polarization, an insulation film is prepared by employing soluble high-molecular material-loaded ferroelectric material powder, spontaneous polarization intensity of the ferroelectric material can be adjusted by an applied electric field, photo-induced electron and cavity are effectively separated under effect of intrinsic polarization field, life of a photon-generated carrier is prolonged, so that a purpose of enhancing photocatalysis performance of the material can be achieved. Compared with the prior art, the method provides the simple and effective approach for enhancing the photocatalysis performance of the ferroelectric material (especially the ferroelectric powder material).

The invention relates to a flexible ultra-long surface plasmon polariton waveguide which comprises a photoelectric input end, a photoelectric output end, a flexible substrate and a flexible surface plasmon polariton waveguide line array, wherein the flexible surface plasmon polariton waveguide is manufactured on the flexible waveguide substrate, then a planar waveguide structure is bent, edges are further aligned for welding, and an ultra-long surface plasmon polariton waveguide structure with the independent photoelectric input end and the photoelectric output end is finally formed. The flexible surface plasmon polariton waveguide array comprises a flexible organic polymer cladding layer and a waveguide metal core layer, a selected metal material is gold, silver, copper, aluminum and other precious metal materials with surface plasmon resonance property in a light frequency wave band, and all light waveguide structures are made of an organic flexible polymer material, so that the flexible ultra-long surface plasmon polariton waveguide has great flexibility, can be bent arbitrarily and even folded, is small in volume and can further improve portability; and the surface plasmon polariton waveguide capable of simultaneously conducting photoelectric signals is adopted as a core layer, so that the obstacle that the photoelectric signals are not compatible is broken.

The invention discloses a miniaturized coaxial waveguide orthogonal mode coupler, and belongs to the technical field of microwave antennas. The coaxial waveguide comprises a coaxial waveguide outer waveguide, a low-frequency-band coupling waveguide, a coaxial waveguide inner waveguide, a short circuit plate, a high-frequency-band coupling waveguide, a waveguide absorption load and a waveguide resonant cavity, the coaxial waveguide outer waveguide and the coaxial waveguide inner waveguide are coaxially connected to form a coaxial waveguide; the outer waveguide of the coaxial waveguide is provided with a low-frequency coupling hole connected with a low-frequency coupling waveguide to realize transmission of low-frequency signals; the outer waveguide of the coaxial waveguide is provided with a high-frequency coupling hole to be connected with a high-band coupling waveguide so as to realize transmission of high-frequency signals; the low-frequency coupling hole and the high-frequency coupling hole form an included angle of 90 degrees on the outer waveguide of the coaxial waveguide; and the short circuit plate is inserted from the slot on the coaxial waveguide, is in good contact with the waveguide in the coaxial waveguide, and is positioned between the low-frequency coupling hole and the high-frequency coupling hole. The antenna has the characteristics of compact structure and miniaturization, and can meet the application of a small-caliber receiving and transmitting common antenna.

The present invention relates to a micro-structured optical fiber for a polarization apparatus, which aims to solve the problems of the existing polarization apparatus that the manufacturing process is complex, mass production cannot be realized, the size is large, and the like. The micro-structured optical fiber of the polarization apparatus is manufactured via the following steps: arranging solid quartz rods in a triangular lattice in a special area of a prefabricated rod during pretreatment prior to drawing of the micro-structured optical fiber, arranging hollow quartz rods in triangular lattices in other areas, and forming an eight-layer hexagonal quartz rod array; and drawing the prefabricated rod into an optical fiber with the diameter being 125mum. The specific area refers to the area of three central lines vertically above an air fiber core, excepting the innermost layer. The micro-structured optical fiber is easy to manufacture; the polarization apparatus based on the micro-structured optical fiber is also easy to manufacture, and mass production of the polarization apparatus can be realized; and the polarization apparatus based on the micro-structured optical fiber has a high extinction ratio, stable performance and a small size, and can be widely applied in optical fiber communication and optical fiber sensing.

The invention discloses a high-power high-energy yellow-light Raman laser system, which comprises a pumping laser source, a laser coupling subsystem, a resonant cavity, a laser gain medium, an acousto-optic Q switch and a nonlinear frequency doubling crystal. The laser gain medium, the acousto-optic Q switch and the nonlinear frequency doubling crystal are sequentially arranged in the resonant cavity. The laser coupling subsystem comprises a first coupling lens and a second coupling lens, and the first coupling lens is located between the pumping laser source and the second coupling lens. Theresonant cavity comprises a first fundamental frequency light-Stokes light high-reflectivity mirror and a second fundamental frequency light-Stokes light high-reflectivity mirror, and the first fundamental frequency light-Stokes light high-reflectivity mirror is located between the second coupling lens and the second fundamental frequency light-Stokes light high-reflectivity mirror. The laser gainmedium comprises a first Nd:YAG crystal and a Nd:YVO4 crystal. The problems that an existing yellow light Raman laser cannot efficiently operate at high repetition frequency and low repetition frequency at the same time, and yellow light cannot be output at high power and high energy at the same time are solved.

The invention relates to a dynamic polarization regulator, which belongs to the technical field of polarization regulation, and solves the problem that two functions of linear polarization electromagnetic wave polarization direction invariance or cross polarization conversion cannot be realized through one regulator in the prior art. The dynamic polarization regulator comprises m*n primitive cellswhich are periodically arranged, wherein m represents the number of rows, n represents the number of columns, and m and n are greater than or equal to 2. Each primitive cell further comprises a metalresonance unit which is used for enabling electromagnetic waves transmitted by the metal resonance unit to be coupled after the metal resonance unit is powered on and acquiring linear polarization waves with the polarization direction invariance or linear polarization waves with the polarization direction subjected to cross polarization conversion, dielectric units which are arranged among the metal layers of the metal resonance unit and are used for providing support for the metal resonance unit and changing the electromagnetic polarization capability of the metal resonance structure, and aregulation unit which is used for controlling the electrification and the electrification direction of the metal resonance unit. Broadband and high-efficiency electromagnetic wave regulation can be carried out, the structure is simple, manufacturing is easy, and the cost is low.

The invention relates to an electrolyte membrane as well as production equipment and a preparation process thereof. According to the invention, the negative temperature state of the electrolyte is utilized; under the action of external voltage and heat, the raw material is melted into a liquid electrolyte, the polarity of the electrolyte is changed from disorder to order, and electrolyte polarization is achieved; in order to prevent heat loss and reduce the voltage, after the electrolyte is changed into a solid state from a liquid state, the electrolyte is changed into a disordered non-polar state again, the electrolyte is gradually cooled to the normal use temperature of the storage battery in the process of gradually reducing the temperature and under the continuous action of external voltage, and in the process, the electrolyte is changed into a polar solid state from the liquid state, and the polarity of the electrolyte is still kept.

The invention discloses a synchronous polarization method for a partitioned piezoelectric element, and belongs to the technical field of polarization of materials with piezoelectric characteristics. According to the invention, the plurality of elastic telescopic probes are adopted to press the subarea polarization electrodes on the piezoelectric element, and the polarization subareas are enabled to obtain polarization voltages with different magnitudes and directions by controlling the relative voltage difference, so that one-time synchronous polarization of the subarea piezoelectric element is completed. According to the invention, the polarization efficiency is improved, and the problem of inconsistent thermal depolarization and partition polarization intensity of the piezoelectric element caused by repeated polarization is avoided. Polarization of hundreds of microns of micro areas is realized, the elastic telescopic probe is in more sufficient contact with the micro electrode, thepolarization process is more stable, electrode surface damage caused by uneven stress is avoided, and the problems of difficult operation, difficult positioning and the like when a traditional polarization method polarizes the micro multi-partition piezoelectric element are solved. Meanwhile, the PC upper computer is used for controlling the high-voltage generator and the temperature control unit,the polarization process is simplified, and the polarization quality is improved.

The invention belongs to the technical field of a loudspeaker, in particular relates to a piezoelectric loudspeaker adopting interdigital electrodes or spiral electrodes, which comprises a vibrating membrane, a piezoelectric ceramic wafer, electrodes and a frame, wherein the piezoelectric ceramic wafer is bonded on the vibrating membrane; the electrodes are arranged on the surface of the piezoelectric ceramic wafer; the frame is used for restricting the vibrating membrane; the electrodes are divided into positive electrodes and negative electrodes; and the electrodes are arranged in an interdigital structure, an interdigital spiral structure or a circular or polygonal concentric staggered structure or in other staggered arrangement modes. The interdigital or spiral electrode structure enables the direction of polarization to be parallel with the plane of the vibrating membrane and enables the electric field between spiral electrodes to be consistent with the direction of polarization, i.e. the ceramic deformation utilizes the piezoelectric strain coefficient d33 rather than the piezoelectric strain coefficient d31 generally used in the traditional piezoelectric loudspeaker. Under the condition that the size, the material and the electric field intensity are consistent, the strain of the piezoelectric ceramic wafer of the invention in the plane of the vibrating membrane is more than two times of the corresponding strain of the traditional piezoelectric loudspeaker, and the vibration of the plane of the vibrating membrane is large, thereby generating larger sound pressure level.

The invention relates to the technical field of piezoelectric ceramics, in particular to a piezoelectric ceramic and a device thereof, the piezoelectric ceramic comprises at least one piezoelectric ceramic piece, a seat tool clamp and at least two electric conductors used for clamping the piezoelectric ceramic piece, and the two electric conductors are respectively provided with electric connection points of an external power supply; the electric connection point is connected with a power supply; therefore, the invention provides the piezoelectric ceramic which is convenient to process, energy-saving and environment-friendly.

The invention discloses an electromagnetic wave polarization and filtering system and method. The electromagnetic wave polarization and filtering system consists of a conductor plate and a plurality of rectangular holes penetrating through the conductor plate, is simple in structure, and is low in preparation difficulty. The electromagnetic wave polarization and filtering system can simultaneouslyrealize polarization and filtering processing of electromagnetic waves of which the incident angle is less than a first preset value, and realizes the purpose of obtaining electromagnetic waves of apreset frequency and a preset polarization direction according to different requirements. In addition, the change of the polarization direction of the emitted electromagnetic waves can be realized byrotating the conductor plate in the horizontal plane. Compared with the mode of filtering and polarizing electromagnetic waves by using a filter and a polarizer in the prior art, the mode of filteringand polarizing electromagnetic waves by using the electromagnetic wave polarization and filtering system is easier to implement and more convenient to operate.