Diamond nitrogen-vacancy (NV) center-based acceleration sensor

An acceleration sensor, diamond technology, used in steering induction equipment, the size/direction of the magnetic field, and the use of magneto-optical equipment for magnetic field measurement, etc. The effect of reducing noise, solving the contradiction between accuracy and sensor volume, and high measurement accuracy

Active Publication Date: 2016-02-24
BEIHANG UNIV
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Problems solved by technology

Existing accelerometers mainly include MEMS accelerometers, crystal oscillator accelerometers, gyro accelerometers, etc., but the basic concepts used in existing accelerometers are still based on...

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  • Diamond nitrogen-vacancy (NV) center-based acceleration sensor
  • Diamond nitrogen-vacancy (NV) center-based acceleration sensor
  • Diamond nitrogen-vacancy (NV) center-based acceleration sensor

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] Such as Figure 1-3 As shown, the present invention is based on a diamond NV ― The acceleration sensor of the color center, the internal components of the acceleration sensor include a semiconductor laser 2, a spring 3, a U-shaped magnet 4, an optical filter 5, an avalanche photodiode 6, an optical fiber 8, a circulator 9, a magnetic field sensitive component 10, and a fixing frame 11, The magnetic field sensitive component includes a microwave wire 7, a left microwave waveguide 12, a right microwave waveguide 13, a dielectric film 14 and a high-concentration NV ―Color center diamond 15; semiconductor laser 2, spring 3, U-shaped magnet 4, optical filter 5, avalanche photodiode 6, optical fiber 8, circulator 9, magnetic field sensitive component 10, fixing frame 11 are integrated and packaged in a magnetic shielding good Inside the meta...

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Abstract

The invention relates to a diamond nitrogen-vacancy (NV) center-based acceleration sensor. Through high-NV center concentration diamond as a magnetic field sensing element, Rabi-flopping frequency of an NV center ensemble electronic two-level energy system produced by laser pulse is measured by an optical detection magnetic resonance (ODMR) so that under the action of extraneous acceleration, high-precision measurement of a variable magnetic field produced by change of relative displacement of a magnetostatic field and high-NV center concentration diamond is realized and thus acceleration information measurement is realized. Through combination of a traditional acceleration sensor mass-spring structure, a micro-nano light-machine-electricity technology and a diamond NV center quantum manipulation principle and use of the diamond NV center in the ultrahigh precision magnetic field measurement, the acceleration sensor member with a small volume, an ultrahigh precision, high sensitivity and a large measurement scope is obtained. The acceleration sensor has an important value in an accelerometer and a gravimeter.

Description

technical field [0001] The invention relates to the technical field of acceleration sensors, in particular to a diamond-based negatively charged nitrogen vacancy (negatively charged nitrogen vacancy, referred to as NV ― ) color center of the acceleration sensor. Background technique [0002] With the continuous advancement of science and technology, the concept and technology of quantum physics are gradually being applied to actual instruments and equipment, thereby improving the performance of instruments and equipment in terms of miniaturization, high precision, and high sensitivity. An important reason why quantum physics-based instruments and equipment can achieve high precision and high sensitivity is the use of optical measurement detection methods, which can be compared with electron spins, nuclear spins, energy band changes, Rabi oscillations, etc. Physical quantities that are sensitive to the external environment can be detected more accurately and quickly. [000...

Claims

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Application Information

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IPC IPC(8): G01C19/58G01R33/032
CPCG01C19/58G01R33/032
Inventor 袁珩曹传桂张刚源张冀星
Owner BEIHANG UNIV
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