24 results about "Electromagnetically induced transparency" patented technology

This invention provides a Rydberg-atom based electromagnetic field detector array comprising a plurality of Rydberg-atom based electromagnetic field detectors, wherein each Rydberg-atom based electromagnetic field detector is divided into a plurality of units, each unit of the plurality of units being either: a variable transparency unit configured to vary its transparency by the Electromagnetically Induced Transparency, EIT, effect and further vary its transparency in response to an incident electromagnetic field, or a separator unit, wherein a sequence of one or more variable transparency units and one or more separator units of the plurality of units for a Rydberg-atom based electromagnetic field detector uniquely identifies that Rydberg-atom based electromagnetic field detector in the Rydberg-atom based electromagnetic field detector array.

The present application relates to the technical field of quantum precision measurement, in particular to a Roland C signal receiving method and system based on Rydberg atoms, which utilizes atomic antennas to prepare Rydberg atoms in an alkali metal atom gas chamber to obtain an electromagnetically induced transparency (EIT) spectrum; a Roland C signal reaches the alkali metal atom gas chamber through free space, and the EIT spectrum produces an oscillation peak by utilizing the Stark effect of the Rydberg atoms; the coupling laser frequency is locked to the maximum position of the oscillation peak amplitude; by applying a direct current bias voltage to the parallel electrodes built in the alkali metal atom gas chamber, on the one hand, the received Roland C signal is corrected, and on the other hand, the alternating current Stark effect is amplified, so that the receiving sensitivity of the Roland C signal is significantly improved.

This invention discloses a high-quality factor electromagnetically induced transparent resonator device based on a dielectric-metal bilayer metamaterial. The device includes a substrate, dielectric resonator units arranged in a two-dimensional periodic pattern on the upper surface of the substrate, and metal resonator units arranged in a two-dimensional periodic pattern on the lower surface of the substrate. The dielectric and metal resonator units have the same two-dimensional distribution period and arrangement direction. The metal resonator unit is located directly below the dielectric resonator units. The substrate is made of a dielectric material. Each dielectric resonator unit consists of two rectangular dielectric ring pillars with their long sides parallel to each other. The metal resonator unit consists of a rectangular metal strip parallel to the long sides of the two rectangular dielectric ring pillars. This device provides a dielectric-metal bilayer metamaterial-based electromagnetically induced transparent resonator, improving the quality factor of electromagnetically induced transparency and overcoming the shortcomings of existing technologies, such as low quality factors and complex adjustment mechanisms.

This invention relates to the field of microwave remote sensing precision calibration technology, and particularly to a traceable microwave radiation calibration device and method based on the quantum coherence effect of Rydberg atoms with a wave-shaped structure. The device includes: a microwave standard radiation system, a dynamic ring track, a Rydberg atom electric field measurement system, a radiometer receiving antenna, a data acquisition and control system, and a data processing system. The device uses the dynamic ring track to move the microwave transmitting antenna, causing microwave electromagnetic signals to alternately irradiate the Rydberg atom electric field measurement system and the radiometer receiving antenna. The interaction between the microwave electric field and specific Rydberg energy levels induces the Euler-Townes effect, causing energy level splitting and resulting in peak position evolution in the electromagnetically induced transparency spectrum of the atomic laser system. The data processing system calculates the electric field intensity and converts it into the corresponding brightness temperature, thereby calibrating the radiometer receiving antenna.

This invention relates to the field of microwave remote sensing precision calibration technology, and particularly to a traceable microwave radiation calibration device and method based on the Rydberg atomic quantum coherence effect. The device includes: a microwave standard radiation system, a parabolic reflector (5), a Rydberg atomic electric field measurement system (1), a radiometer receiving antenna (3), a data acquisition and control system (6), and a data processing system (14). The microwave electromagnetic signal from the microwave transmitting antenna (4) is reflected by the parabolic reflector (5), so that the microwave electromagnetic signal alternately irradiates the Rydberg atomic electric field measurement system (1) and the radiometer receiving antenna (3). The interaction between the microwave electric field and a specific Rydberg energy level causes the Euler-Townes effect energy level splitting, resulting in a peak position evolution of the electromagnetically induced transparency spectrum in the atomic laser system. The data processing system (14) calculates the electric field strength and converts the electric field strength into the corresponding brightness temperature, thereby calibrating the radiometer receiving antenna (3).

This invention discloses a magnetic field-excited electromagnetically induced transparency-like device and method. The device includes two opposing FR-4 dielectric substrates and a metal-etched resonant structure fixed to the surface of the FR-4 substrates. The metal resonant structure includes a copper double U-shaped ring resonant structure and a double circular ring resonant structure. Both the double U-shaped ring resonator and the double circular ring resonator are excited by incident electromagnetic waves. The incident electric field direction is symmetrical to the structure, and the incident magnetic field direction is perpendicular to the surface of the dielectric substrate. Both the double U-shaped ring structure and the double circular ring structure are excited by the incident magnetic field, but with different coupling strengths, forming a bright-mode-bright-mode coupling. This invention features a bright-mode-bright-mode channel coupling method with simultaneous magnetic field excitation. By using two resonant structures with different coupling strengths to the electromagnetic field, a two-layer electromagnetically induced transparency-like device with large group time delay and high sensitivity is obtained.

The invention provides a thin-film lithium niobate electro-optical modulator and method based on an electromagnetically-like induced transparency effect, and relates to the technical field of optical fiber communication. The thin film lithium niobate electro-optical modulator comprises a thin film lithium niobate substrate; the optical waveguide structure is formed on the thin-film lithium niobate substrate and comprises a direct light waveguide and an annular resonant cavity waveguide which are coupled with each other, and the annular resonant cavity waveguide is configured to be capable of supporting at least one first optical mode and at least one second optical mode which are different in optical mode; the first optical mode and the second optical mode can generate coherent coupling and interference, so that a transmission spectrum of the straight light waveguide forms an electromagnetically-induced transparent transmission peak in the micro-ring resonant cavity and generates high-dispersion optical response; the traveling wave electrode system is arranged on the annular resonant cavity waveguide and is used for applying a modulation electric field to the annular resonant cavity waveguide; and the direct current bias device is connected with the traveling wave electrode system and is used for superposing the direct current bias voltage and the radio frequency modulation voltage and then applying the superposed voltage to the traveling wave electrode system.

The utility model relates to the field of angle measurement, in particular to a Rydberg atom electromagnetic induction transparency effect angle measuring device. Comprising a mounting plate, a first laser, a first laser beam splitter, an atom steam bubble, a first adjusting assembly, a second laser beam splitter, a third laser beam splitter, a second adjusting assembly, a second laser, a photoelectric detector, a data analysis module and a connecting line. The laser beam splitter is arranged to replace a reflective mirror, the number of optical elements can be reduced, the optical path design is simplified, the whole system is more compact and convenient to install and debug, the first adjusting assembly and the second adjusting assembly are arranged and can be used for adjusting the angles of the atom steam bubble and the laser beam splitter respectively, and the adjustment precision is improved. The measuring device can adapt to the measuring requirements of different angles, the measuring flexibility is improved, the application range is widened, the optical path can be further optimized by adjusting the angle, the measuring error caused by angle deviation is reduced, and therefore the measuring precision is improved.

The application discloses a method, system and detection device for detecting partial discharge signals by using Rydberg atoms, and the method comprises the following steps: preparing Rydberg atoms in a cesium atom vapor chamber; receiving an optical signal by a photoelectric detector; obtaining an electromagnetically induced transparency spectrum and taking the spectrum as an electromagnetically induced transparency background spectrum; placing a propagation direction of a to-be-detected signal perpendicular to a laser propagation direction in the cesium atom vapor chamber; preparing Rydberg atoms in the cesium atom vapor chamber again; receiving an electromagnetically induced transparency spectrum under the influence of the to-be-detected signal by the photoelectric detector and taking the spectrum as a to-be-detected electromagnetically induced transparency spectrum; comparing the to-be-detected electromagnetically induced transparency spectrum with the electromagnetically induced transparency background spectrum; if a signal peak exists in the spectrum, it is indicated that the to-be-detected signal exists in partial discharge; and if the signal peak does not exist, it is indicated that the to-be-detected signal does not exist in partial discharge.

The invention provides a Rydberg atom microwave detection device and method based on a hollow-core optical fiber. The device comprises a pump light laser, a detection light laser, a microwave convergence device, an atom gas chamber and a signal processing module, the atomic gas chamber is a hollow-core anti-resonance optical fiber gas chamber formed based on a hollow-core anti-resonance optical fiber, and the hollow-core anti-resonance optical fiber gas chamber is filled with alkali metal atom steam; the detection light laser emits detection laser to one end of the hollow-core anti-resonance optical fiber gas chamber, and alkali metal atoms in the hollow-core anti-resonance optical fiber gas chamber are excited from a ground state to a first excitation state; the pump light laser emits continuous laser to the other end of the hollow-core anti-resonance optical fiber air chamber, atoms in a first excitation state are excited to a corresponding Rydberg state, and an electromagnetic induction transparent window is formed; and the signal processing module is used for determining the field intensity of the electromagnetic wave to be detected based on the AT splitting peak information of the electromagnetic induction transparent window in the detection laser. According to the invention, the pumping excitation efficiency and detection efficiency of Rydberg atoms are improved.

This invention provides an electromagnetic field detector, a system including the electromagnetic field detector, and a method of operating the electromagnetic field detector. The electromagnetic field detector includes: a first optical signal interface configured to receive a first optical signal from one or more remote light sources; an electromagnetic field transmitter configured to transmit a local oscillator electromagnetic field generated according to the first optical signal, the electromagnetic field transmitter including: a photocurrent generator configured to generate a photocurrent according to the first optical signal; an antenna interface configured to provide the photocurrent to an antenna to transmit the local oscillator electromagnetic field; a second optical signal interface configured to receive a probe optical signal and a coupled optical signal from one or more remote light sources; and a transmission medium. The medium is configured to be excited by a probe optical signal and further excited by a coupling optical signal, wherein the probe optical signal has a probe frequency set to excite electrons in the transmission medium to a first excited state, and the coupling optical signal has a coupling frequency set to excite electrons in the transmission medium to a predetermined Rydberg state to induce an electromagnetically induced transparent (EIT) effect, wherein the transmission medium is further configured to receive a local oscillator electromagnetic field and a phase-modulated electromagnetic field from a remote transmitter, such that the combination of the phase-modulated electromagnetic field and the local oscillator electromagnetic field causes a change in the probe optical signal, and the phase state of the phase-modulated electromagnetic field can be detected according to the change.

An atomic oscillator includes a frequency oscillator configured to output an oscillation signal; a light source configured to output laser light containing first light and second light having frequencies different from each other based on a modulation signal corresponding to the oscillation signal; an atomic cell configured to encapsulate alkali metal atoms; a light reflector including a mirror configured to change a reflection angle of the laser light to cause the laser light reflected off the mirror to enter the atomic cell at a predetermined cycle; a photodetector configured to detect the laser light passing through the atomic cell and output a detection signal corresponding to an intensity of the laser light; anda control circuit configured to control the frequency oscillator based on the detection signal to adjust a frequency of the oscillation signal so that the alkali metal atoms cause an electromagnetically induced transparency phenomenon to occur.

This invention discloses a terahertz electromagnetically induced transparent modulation device based on liquid crystal material and its application. The modulation device consists of transparent modulation units arranged in an array. From top to bottom, each transparent modulation unit comprises a dielectric substrate, an electromagnetically induced transparent microstructure, a liquid crystal layer, and a silicon backplane. The electromagnetically induced transparent microstructure includes a truncated line and a gold-plated electric field coupling capacitor-inductor resonant structure. A silicon island is introduced into the electric field coupling capacitor-inductor resonant structure to control the propagation of terahertz waves. The liquid crystal layer serves as an active modulation module. This invention achieves logic modulation based on the electromagnetically induced transparency effect through a silicon-gold composite electromagnetically induced transparent microstructure, and achieves modulation of the device's operating frequency band by filling with liquid crystal material. The designed modulation device meets the requirements of wide modulation frequency range, simple structure, and continuous multi-band modulation of terahertz waves, thus broadening the application scope of liquid crystal materials in the field of terahertz wave modulation.

Systems and methods to perform quantum computing using a Rydberg blockade effect for a photon-photon nonlinear interaction at the single photon level that realizes a controlled-phase (CP) gate between control and target qubits that are encoded in the polarizations of a photon pair. Electromagnetically induced transparency (EIT) is used to write the photonic quantum state into the ground states of an ensemble of atoms. Then a controlled phase shift is induced via combination of Rabi flopping / oscillations and a Rydberg blockade effect. Then EIT transfers the quantum state with the conditional phase shift back from the ensemble of atoms to the photon pair, resulting in a CP gate. Waveplates before and after the ensemble of atoms can convert the CP gate to a CNOT gate. Distributed quantum computing is realized by transporting the photons between spatially separated quantum memories (i.e., ensemble of atoms).

The invention relates to a physical constant traceable atom temperature measuring instrument and method based on fluorescence detection, and the method comprises the steps: a low n-state atom radiation field sensor carries out the reverse coincidence propagation of 780 nm detection light and 776 nm decoration light in a rubidium atom steam pool, and forms electromagnetic induction transparency; according to the Rydberg atomic radiation field sensor, 1263 nm coupling light and decoration light are subjected to coincident propagation in the same direction, and three-photon electromagnetic induction transparency is formed; under the induction of black-body radiation, atoms jump to adjacent energy levels and generate fluorescence; the spectral density characteristics of blackbody radiation in a plurality of characteristic wavebands are synchronously extracted to a unified quantum sensing platform through common fluorescence detection of an atom with a high main quantum number and an atom with a low main quantum number. And fitting the absolute temperature of the object directly according to the Planck black body radiation law through the acquired wide-spectrum radiation spectrum density data. The method does not depend on external calibration, and can effectively suppress high-precision absolute temperature measurement influenced by surface emissivity.

The invention relates to a method for operating an electronic computing device (4) with an optical neural network (5), comprising the steps of: providing the optical neural network (5) with at least one optical neuron (11, 13) having an electromagnetically induced transparency property; generating a first laser signal by means of a coupling laser (6) and generating a second laser signal by means of a probe laser (6); transmitting the first laser signal and the second laser signal to the at least one optical neuron (11); generating an optical control signal (18) to control a weighting of the at least one optical neuron (11, 13); generating a magnetic field (14) depending on the optical control signal (18); and adjusting a weighting of the at least one optical neuron (11, 13) depending on the generated magnetic field (14).Furthermore, the invention relates to an electronic computing device (4).

The invention relates to a switch type electromagnetic induction transparent metasurface with continuously adjustable transmissivity, and belongs to the technical field of electromagnetic wave metamaterials. The structure of each unit cell unit sequentially comprises a dielectric layer and a metal patch layer from bottom to top; the metal patch layer comprises a resonant ring and a three-rod resonator; the three-rod resonator is composed of three metal rods extending outwards from the center of the three-rod resonator every 120 degrees, and the center of the three-rod resonator coincides with the circle center of the resonant ring. The technical problems that when an existing EIT metasurface serves as an optical switch, the transmissivity is low, continuous regulation and control are difficult, an active regulation and control mechanism is complex, cost is high and the like are solved, and continuous regulation and control of the microwave optical switch are achieved.

This invention provides a frequency-locked laser system, including a probe light source, a frequency-output probe laser, and a frequency-doubled coupling light source to output a coupling laser. The frequency-locking module includes an electro-optic phase modulator to phase-modulate the probe laser and generate a modulated laser; a saturated absorption spectrum device receives the modulated laser and generates a saturated absorption spectrum signal, which is detected by a first photodetector; an electromagnetic induction transparent spectrum generation device receives the modulated laser and the coupling laser and generates an electromagnetic induction transparent spectrum signal, which is detected by a second photodetector; a frequency-locking controller generates a first error signal by modulating and demodulating the saturated absorption spectrum signal, which controls a first frequency modulation controller to lock the frequency of the probe light source; after the probe light source is locked, the electromagnetic induction transparent spectrum signal is modulated and demodulated to generate a second error signal, which controls a second frequency modulation controller to lock the frequency of the coupling light source. This solves the problems of complex tuning, poor stability, and large size in dual-wavelength laser systems.

This invention provides an overvoltage quantum detection system and method for Rydberg atom antenna combined electrical appliances, relating to the field of overvoltage condition detection technology for power equipment. The detection system includes: a main control device, a transmission optical fiber, and multiple overvoltage Rydberg sensors; wherein, the main control device is used to generate detection and coupling lasers; the transmission optical fiber connects the main control device and the overvoltage Rydberg sensors, and is used to transmit the detection and coupling lasers; the multiple overvoltage Rydberg sensors are arranged in a three-half wiring configuration at each T-shaped connection point of the combined electrical appliance under test, and are used to sense the internal electric field signal of the combined electrical appliance under test based on the electromagnetically induced transparency effect of Rydberg atoms and the Autler-Townes splitting phenomenon; the main control device is also used to determine the fault location of the combined electrical appliance under overvoltage conditions based on the internal electric field signal sensed by the multiple overvoltage Rydberg sensors and the sensing time. This invention improves the accuracy of overvoltage fault location.

The invention discloses a device and method for accurately measuring space magnetic field distribution by using a vector lattice light field, the device comprises a radial polarization vector lattice light field generation light path, a magneto-optical trap atom trapping system and an atomic gas imaging system, and the method comprises the following steps: preparing cold atomic gas in a magneto-optical trap; opening a magnetic field to be measured, and turning off the six laser beams and the quadrupole magnetic field of the magneto-optical trap; detecting the cold atom gas by using the radial polarization vector lattice light field; according to the invention, on the basis of the space electromagnetic induction transparency effect of cold atoms, the radial polarization vector light in honeycomb lattice distribution is used for photographing the atomic gas for a single time, so that accurate measurement of the magnetic field distribution in the atomic gas area can be realized.

This invention provides a polarization-tuned atomic terahertz enhancement detection device, comprising a polarization control module, a mirror assembly, a resonant cavity module, an atomic detection module, and a signal processing module connected sequentially via optical signals. The polarization control module adjusts the polarization state of the terahertz signal; the resonant cavity module enhances the interaction between the terahertz wave and atoms; the atomic detection module senses the terahertz wave signal and acquires a detection optical signal through electromagnetically induced transparency; and the signal processing module receives the detection optical signal and extracts and amplifies the detection signal. This invention effectively improves the detection sensitivity and stability of terahertz signals by combining precise polarization state control with the electric field enhancement of the resonant cavity, achieving a minimum detectable field strength on the order of μV / cm; it has a wide frequency adaptation range, capable of continuous tuning within 1-10 GHz; and it offers more stable performance and a wider range of applications.

The embodiment of the invention relates to the field of multi-body dynamics quantum simulation experiment devices, in particular to a multi-body quantum simulation method and device based on Rydberg electromagnetically induced transparency, and the multi-body quantum simulation method comprises an interaction mechanism between Rydberg light beams and electrostatic equilibrium interaction caused by Rydberg state polarization; modulating a beam of light through a phase plate or a grating; the multi-mass quantum dynamics is simulated, and especially the non-equilibrium dynamics process is detected through a photoelectric detector; and the rubidium bubble can be replaced by the cesium bubble, so that the electromagnetically induced transparency phenomenon is easier to realize. A phase plate or a grating is designed in an experimental device to split a beam of light into multiple beams of light, and the multi-mass quantum simulator based on Rydberg electromagnetically induced transparency can be realized by utilizing an interaction mechanism among Rydberg light beams and electrostatic equilibrium interaction caused by Rydberg state polarization.

The utility model relates to the technical field of sensing, in particular to a Rydberg atom electromagnetic induction transparency effect radio frequency electric field polarization direction sensing device which comprises a supporting table, a laser, an atom air chamber, a photoelectric detector, an adjusting assembly, a temperature control assembly, a pressure controller, an optical window, a control button, a rotating shaft and a first driving motor. According to the utility model, the angles of the laser and the photoelectric detector can be adjusted by arranging the adjusting assembly, and the angle of the atomic gas chamber can be adjusted by arranging the first driving motor, so that the laser, the atomic gas chamber and the photoelectric detector can be adjusted according to different measurement requirements; according to the method, the atomic density can be adjusted by changing the temperature and the air pressure, so that the atomic density is in the optimal state, sufficient atoms are ensured to participate in interaction, collision and interference caused by too high density are avoided, the measurement flexibility can be improved, the measurement precision is optimized, the adaptability is enhanced, and the measurement result is more comprehensive and accurate.

The invention relates to a satellite-borne VDES communication system and method based on Rydberg atoms, which is suitable for detecting and receiving high-sensitivity VDES signals in an on-orbit complex electromagnetic environment, and comprises a Rydberg atom receiving unit used for converting received VDES microwave signals into optical signals through an electromagnetic induction transparency effect and an AT splitting effect; the optical signal processing unit is connected with the Rydberg atom receiving unit and is used for converting the optical signal into an electric signal and outputting a baseband waveform; the quantum demodulation unit is connected with the optical signal processing unit and is used for carrying out demodulation and collision signal separation on the baseband signal; the quantum demodulation unit is provided with a satellite-borne interface module, and the satellite-borne interface module is used for outputting demodulation data to a satellite data transmission system. According to the invention, the core bottlenecks of the current satellite-borne VDES system in three aspects of sensitivity, anti-interference performance and channel capacity are solved.