30 results about "Nitrogen-vacancy center" patented technology

Method to produce diamonds containing Nitrogen-Vacancy centers from diamonds grown by a high pressure and high temperature process and containing isolated substitutional nitrogen, comprising: —Irradiating (12) said diamonds by an electron beam such that the irradiation dose is comprised between 1017 and 1019 electrons per square centimeter; —annealing (14) the irradiated diamonds in vacuum or in a inert atmosphere at a temperature above 700° C. and for at least 1 hour; characterized in that said electron beam has an acceleration energy above 7 MeV.

A solid-state gyroscope apparatus based on ensembles of negatively charged nitrogen-vacancy (NV−) centers in diamond and methods of detection are provided. In one method, rotation of the NV− symmetry axis will induce Berry phase shifts in the NV− electronic ground-state coherences proportional to the solid angle subtended by the symmetry axis. A second method uses a modified Ramsey scheme where Berry phase shifts in the 14N hyperfine sublevels are employed.

In a device (40) for analysing substances in a sample on the basis of a measurement of nuclear magnetic resonances, the device comprises means (47) for generating a magnetic field. The device (40) is characterized in that, in order to detect magnetic resonances induced in the sample by the generation of the magnetic field, provision is made of at least one magnetic field sensor which comprises at least one sensitive component (45) with diamond structures, wherein the diamond structures have nitrogen vacancy centres.

Systems and apparatuses are disclosed for a hydrophone using a nitrogen vacancy center diamond magnetic sensor.

A titanium nitride-based metamaterial, and method for producing the same, is disclosed, consisting of ultrathin, smooth, and alternating layers of a plasmonic titanium nitride (TiN) material and a dielectric material, grown on a substrate to form a superlattice. The dielectric material is made of A1-xScxN, where ‘x’ ranges in value from 0.2 to 0.4. The layers of alternating material have sharp interfaces, and each layer can range from 1-20 nanometers in thickness. Metamaterials based on titanium TiN, a novel plasmonic building block, have many applications including, but not ‘limited to emission enhancers, computer security, etc. The use of nitrogen vacancy centers in diamond, and light emitting diode (LED) efficiency enhancement is of particular interest.

Masers and microwave amplifiers that can function in the continuous-wave mode at room temperature are provided. The maser system can include a diamond gain medium having nitrogen-vacancy centers, and a resonator can be disposed around the gain medium. The resonator can be disposed in a cavity box, and radiation (e.g., visible light) can be provided to the gain medium to cause emission of microwave radiation.

A method for performing sub-nanometer three-dimensional magnetic resonance imaging of a sample under ambient conditions using a diamond having at least one shallowly planted nitrogen-vacancy (NV) center. A driving radio-frequency (RF) signal and a microwave signal are applied to provide independent control of the NV spin and the target dark spins. A magnetic-field gradient is applied to the sample with a scanning magnetic tip to provide a narrow spatial volume in which the target dark electronic spins are on resonance with the driving RF field. The sample is controllably scanned by moving the magnetic tip to systematically bring non-resonant target dark spins into resonance with RF signal. The dark spins are measured and mapped by detecting magnetic resonance of said nitrogen-vacancy center at each of said different magnetic tip positions. The dark-spin point-spread-function for imaging the dark spins is directly measured by the NV center.

The invention relates to a weak magnetic field measurement technique, in particular, a novel nitrogen-vacancy center diamond scanning magnetometer. With the novel nitrogen-vacancy center diamond scanning magnetometer adopted, the problems of low sensitivity and limited application range of existing weak magnetic field information measuring tools can be solved. The novel nitrogen-vacancy center diamond scanning magnetometer of the nitrogen-vacancy center diamond includes an atomic force microscope system and an optical detection magnetic information system; and the atomic force microscope system includes an ultra-high vacuum chamber, a scanning tube, a nitrogen-vacancy center diamond probe, a 670nm-wavelength laser, a four-quadrant photodiode detector, a phase-locked loop, an automatic gain control loop, piezoelectric ceramic, a 50-ohm resistor, a feedback control loop, a lock-in amplifier, a carrier, a surface topography information output port and a magnetic information output port. The novel nitrogen-vacancy center diamond scanning magnetometer of the invention is suitable for weak magnetic field information measurement.

The invention discloses an expandable quantum information processing system and method, which relate to the technical field of quantum computing. Acquisition system, electric control system. The present invention proposes a carbon nanotube-spin hybrid quantum system, in which a microwave signal and a magnetic field are applied to the area where each group of nitrogen vacancy centers and quantum dots are located, and there is a magnetic field between the electrons of each group of nitrogen vacancy centers and the quantum dots. Dipole-dipole interaction; by manipulating the magnetic field and microwave signal, the indirect coupling between two nitrogen-vacancy centers on the order of micrometers can be achieved through the action of carbon nanotubes, realizing two nitrogen-vacancy centers at a distance Quantum entanglement between centers, thus providing a scalable approach to quantum information processing.

The invention discloses an optical fiber magnetic field sensor and a preparation method thereof. The optical fiber magnetic field sensor comprises an optical fiber and a plurality of diamond micro-columns, the plurality of diamond micro-columns are positioned at one end in the optical fiber; each diamond micro-column contains a nitrogen-vacancy center; when the optical fiber magnetic field sensoris used for measuring a magnetic field, one end, containing the diamond micro-column, of the optical fiber is placed in an environment of the magnetic field to be measured, and laser with a preset wavelength is emitted from the other end of the optical fiber, so that the the nitrogen-vacancy center is excited to emit fluorescence; and steps of transmitting a sweep frequency signal in a preset frequency range to one end, containing the diamond micro-column, of the optical fiber, collecting fluorescence, and determining the size of the magnetic field to be measured by analyzing the change rule of the intensity of the fluorescence along with the frequency of the sweep frequency signal are carried out. According to the invention, more nitrogen-vacancy centers can be integrated at an optical fiber port, the sensitivity is related to the number of the nitrogen-vacancy centers in the sample, and a magnetometer with higher sensitivity can be obtained through the diamond micro-column sample with higher nitrogen-vacancy center color center density.

Sensors and methods are provided that include a diamond material containing a nitrogen vacancy center, the diamond material being configured to be exposed to an environment comprising one or more gases, an optical light source configured to excite the nitrogen vacancy center of the diamond material with an optical light beam produced therefrom, a detector configured to detect a signal originating from the diamond material in response to the optical light beam exciting the nitrogen vacancy center, and the capability of analyzing the signal to identify a specific gas in the environment. Also included are levitated spin-optomechanical systems capable of elevating in a vacuum a diamond material containing a nitrogen vacancy center, applying microwave radiation to the diamond material for controlling and flipping the electron spin of the nitrogen vacancy center, and monitoring electron spin of the nitrogen vacancy center.

The present invention relates to a magnetometer (100) using optically detected magnetic resonance (ODMR), where a solid state material (10), such as diamond, with an ensemble of paramagnetic defects, such as nitrogen vacancies centers NV, is applied. An optical cavity (20) is optically excited by an irradiation laser (25) arranged therefore. A coupling structure (30) causes a microwave excitation (Ω) of the paramagnetic defects, and a permanent magnetic field (40, B_C) causes a Zeeman splitting of the energy levels in the paramagnetic defects. A probing volume (PV) in the solid state material is thereby defined by the spatially overlapping volume of the optical excitation by the irradiation laser (25), the coupling structure (30) also exciting the defects, and the constant magnetic field. The magnetometer then measures an unknown magnetic field by detecting emission (27), e.g. fluorescence, from the defects in the probing volume (PV) from the double excitation of the defects by the irradiation laser, and the coupling structure exciting these defects.