Design and simulation of an accelerometer based on NV center spin–strain coupling
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2023-11-04 |
| Journal | Chinese Physics B |
| Authors | Lu-Min 鲁敏 Ji 季, Li-Ye 立业 Zhao 赵, Yu-Hai 裕海 Wang 王 |
| Citations | 2 |
Abstract
Section titled “Abstract”The nitrogen-vacancy (NV) center quantum systems have emerged as versatile tools in the field of precision measurement because of their high sensitivity in spin state detection and miniaturization potential as solid-state platforms. In this paper, an acceleration sensing scheme based on NV spin-strain coupling is proposed, which can effectively eliminate the influence of the stray noise field introduced by traditional mechanical schemes. Through the finite element simulation, it is found that the measurement bandwidth of this ensemble NV spin system ranges from 3 kHz to hundreds of kHz with structure optimization. The required power is at the sub-μW level, corresponding to a noise-limited sensitivity of <mml:math xmlns:mml=“http://www.w3.org/1998/Math/MathML” overflow=“scroll”> <mml:mrow> <mml:mn>6.7</mml:mn> <mml:mo>×</mml:mo> <mml:msup> <mml:mrow> <mml:mn>10</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>5</mml:mn> </mml:mrow> </mml:msup> <mml:mspace width=“0.25em”/> <mml:mi mathvariant=“normal”>g</mml:mi> <mml:mo>/</mml:mo> <mml:msqrt> <mml:mrow> <mml:mi mathvariant=“normal”>Hz</mml:mi> </mml:mrow> </mml:msqrt> </mml:mrow> </mml:math> . Compared with other types of accelerometers, this micro-sized diamond sensor proposed here has low power consumption, exquisite sensitivity, and integration potential. This research opens a fresh perspective to realize an accelerometer with appealing comprehensive performance applied in biomechanics and inertial measurement fields.