8 results about "Diamond color" patented technology

The invention relates to the technical field of temperature control, in particular to a temperature control system and method based on an NV color center, and the system comprises a diamond NV color center temperature sensing module which is used for sensing the temperature change of a target area in real time and generating a corresponding fluorescence signal; the dual-channel demodulation and signal processing module is connected with the diamond NV color center temperature sensing module and is used for extracting an actual temperature value from the fluorescence signal; the PID temperature control module is connected with the dual-channel demodulation and signal processing module and is used for generating a control signal according to the deviation between the actual temperature value and the target temperature value; and the adjustment execution module is connected with the PID temperature control module and is used for adjusting the temperature of the target area according to the control signal. The high-stability temperature control system has the beneficial effects that diamond NV color center quantum sensing, two-channel demodulation and PID closed-loop control technologies are fused, and high-stability temperature control of milliKelvin-level precision and microsecond-level response under the micro-nano scale is realized.

The automatic diamond color grader can carry out color grading on diamonds on a continuous line, and manual color evaluation is not needed. And a sample diamond is conveyed by the input conveying belt and is placed on the mounting seat on the rotating plate by the mechanical arm. Nm mounting seats are arranged on the rotating plate, and Nr colorimetric stones with known color grades and Ns sample diamonds are mounted on the mounting seats. The camera shoots pictures of all diamonds on the rotating plate, then the stepping motor rotates the rotating plate by 360 / Nm degrees, and another picture is shot. The operation is repeated for Nm times, so that the sample diamond and all the colorimetric stones are respectively imaged at all Nm possible rotating positions. Averaging the pixels of all positions of each diamond to obtain x and y average values of each diamond; and the color grade of the sample diamond is the closest colorimetric stone with light x and y average values.

The invention discloses a multi-sensing-unit mutual correction tracking quantum magnetic measurement method and system for tunnel magnetoresistance and a diamond color center, a storage medium and electronic equipment. The method comprises the following steps: measuring an absolute magnetic field value of a microwave signal based on an NV color center sensing unit; determining calibration parameters of the TMR sensing unit based on the absolute magnetic field value; the voltage value output by the TMR sensing unit with the determined calibration parameters is converted into a TMR prediction magnetic field, and the TMR prediction microwave frequency is obtained through the TMR prediction magnetic field; calculating an NV measurement magnetic field based on the TMR prediction microwave frequency or the NV prediction frequency calculated by the NV color center sensing unit in the previous period; and calculating a magnetic field tracking signal based on the TMR prediction magnetic field and the NV measurement magnetic field, and taking the magnetic field tracking signal as a final magnetic field intensity value.

The invention relates to the technical field of terahertz signal detection, and provides a terahertz signal detection fluorescence system based on a diamond color center, and the system comprises an objective table which is provided with a diamond; the terahertz signal generation light path is used for generating a terahertz signal with adjustable frequency and acting on a Pb color center of the diamond; the phonon signal detection light path comprises a fluorescence detection module, a demodulation module and a signal processing module, the fluorescence detection module is used for enabling generated laser to act on the Pb color center of the diamond to generate a mixed fluorescence signal, the demodulation module is used for separating the mixed fluorescence signal to obtain two light signals, the intensity difference is determined according to the two light signals, and the signal processing module is used for processing the intensity difference; the signal processing module is used for determining the numerical value of the terahertz signal based on the electric signal. Therefore, high-sensitivity and direction-selectivity detection and real-time monitoring of terahertz signals can be realized by utilizing the quantum characteristic of the Pb color center of the diamond and the collaborative design of double optical paths.

An automated diamond color-grading machine color grades a continuous line of diamonds without human color evaluation. A sample diamond is carried by an input conveyor and placed on a mount on a rotating plate by a robotic arm. The rotating plate has Nm mounts with Nr master stones of known color grades and Ns sample diamonds. A camera takes a photo of the rotating plate with all diamonds and then a step motor rotates the plate by 360 / Nm degrees and another photo captured. This is repeated Nm times so that the sample diamond and all master stones are each imaged in all Nm possible rotational positions. Pixels are averaged over all positions for each diamond to get an average x, y value for each diamond. The color grade of the sample diamond is the master stone with the closest less-color x,y average.

The application provides a quantum current sensor and a current measurement method, which comprise a diamond NV sensing chip, a magnetic concentrating ring, a laser source, a photoelectric conversion module, a microwave modulation and demodulation module and a magnetic flux regulation module; the magnetic concentrating ring is provided with an opening for sensing the magnetic flux of a measured wire; the diamond NV sensing chip is used for detecting the magnetic flux at the opening; the laser source is used for generating a laser signal of a preset wavelength and outputting the laser signal to the diamond NV sensing chip; the photoelectric conversion module receives a reflected fluorescent signal, converts the fluorescent signal into an electric signal and transmits the electric signal to the microwave modulation and demodulation module to finally obtain a demodulation voltage; and the magnetic flux regulation module obtains a reverse magnetic flux loaded to the magnetic flux detection module based on the demodulation voltage, so as to maintain the magnetic flux at the opening. The application provides the reverse magnetic flux, so that the magnetic field sensed at the NV color center is always in a small range, the problem that the diamond NV color center is difficult to detect under a large current magnetic field is avoided, and the dynamic range of the diamond NV color center for measuring the current is effectively widened.

The invention discloses a preparation method of an artificial diamond, and relates to the technical field of preparation of artificial diamonds. According to the preparation method disclosed by the invention, unreacted carbon and nitrogen elements in the originally discharged tail gas are converted into available gaseous carbon and nitrogen sources again through a technical path of tail gas recovery, pyrolysis purification and reutilization, and the available gaseous carbon and nitrogen sources are introduced into an MPCVD deposition system again to participate in diamond growth, so that the total utilization rate of the carbon and nitrogen elements in the hair is greatly increased, and the production cost is reduced. While the purity of the diamond is ensured, the uniform color of the diamond is ensured, and the requirements of high-grade customized diamond customers for making commemorative large-size / high-purity diamonds are met.

Local quantum communication networks for general-purpose quantum computing may use millions of physical qubits to encode thousands of logical qubits, presenting a substantial hardware architecture challenge. Our modular Quantum System-on-Chip (QSoC) architecture uses a quantum microchiplet (QMC) that features compact two-dimensional arrays of diamond color centers with a resonant dielectric antenna integrated on a foundry-processed chip. Our QSoC architecture enables full connectivity for quantum memory arrays in a set of different resonant frequencies and offers the possibility of further scaling the solid-state physical qubit number via larger and denser QMC arrays and optical frequency multiplexing networking. Our QSoC architecture can efficiently generate a large scale fully connected qubit state by tuning the emitters' emission frequency. Larger qubit resources can achieve a connected qubit cluster state with less tunabiliy. Our QSoC architecture can be readily extended to other solid-state quantum memory platforms.