1] Institut für Theoretische Physik, Universität Ulm, Albert-Einstein Allee 11, 89069 Ulm, Germany [2] Centre for Integrated Quantum Science and Technology, Universität Ulm, 89069 Ulm, Germany.
1] Centre for Integrated Quantum Science and Technology, Universität Ulm, 89069 Ulm, Germany [2] Institut für Quantenoptik, Universität Ulm, Albert-Einstein Allee 11, 89069 Ulm, Germany.
Nat Commun. 2014 Jun 9;5:4065. doi: 10.1038/ncomms5065.
The ability to measure weak signals such as pressure, force, electric field and temperature with nanoscale devices and high spatial resolution offers a wide range of applications in fundamental and applied sciences. Here we present a proposal for a hybrid device composed of thin film layers of diamond with colour centres and piezoactive elements for the transduction and measurement of physical signals. The magnetic response of a piezomagnetic layer to an external stress or a stress induced by a signal is shown to affect significantly the spin properties of nitrogen-vacancy centres in diamond. Under ambient conditions, realistic environmental noise and material imperfections, we show that this hybrid device can achieve significant improvements in sensitivity over the pure diamond-based approach in combination with nanometre-scale spatial resolution. Furthermore, the proposed hybrid architecture offers novel possibilities for engineering strong coherent couplings between nanomechanical oscillator and solid state spin qubits.
利用纳米器件和高空间分辨率测量微弱信号（如压力、力、电场和温度）的能力，为基础科学和应用科学的广泛应用提供了可能。在这里，我们提出了一种混合器件的设计方案，该器件由具有色心和压电元件的金刚石薄膜层组成，用于物理信号的转换和测量。实验结果表明，压磁层对外部应力或信号引起的应力的磁响应会显著影响金刚石中氮空位中心的自旋特性。在环境条件下，考虑到实际的环境噪声和材料缺陷，我们证明，与纯基于金刚石的方法相比，这种混合器件在结合纳米级空间分辨率的情况下，能够显著提高灵敏度。此外，所提出的混合结构为纳米机械振荡器和固态自旋量子位之间的强相干耦合提供了新的可能性。
