We carried out a proof-of-principle demonstration of the reconstruction of a static vector magnetic field involving adjacent three nitrogen-vacancy(NV) sensors with corresponding different NV symmetry axes in a bulk d...We carried out a proof-of-principle demonstration of the reconstruction of a static vector magnetic field involving adjacent three nitrogen-vacancy(NV) sensors with corresponding different NV symmetry axes in a bulk diamond. By means of optical detection of the magnetic resonance(ODMR) techniques, our experiment employs the continuous wave(CW) to monitor resonance frequencies and it extracts the information of the detected field strength and polar angles with respect to each NV frame of reference. Finally, the detected magnetic field relative to a fixed laboratory reference frame was reconstructed from the information acquired by the multi-NV sensor.展开更多
We perform a proof-of-principle experiment that uses a single negatively charged nitrogen–vacancy（NV） color center with a nearest neighbor ^13C nuclear spin in diamond to detect the strength and direction（includin...We perform a proof-of-principle experiment that uses a single negatively charged nitrogen–vacancy（NV） color center with a nearest neighbor ^13C nuclear spin in diamond to detect the strength and direction（including both polar and azimuth angles） of a static vector magnetic field by optical detection magnetic resonance（ODMR） technique. With the known hyperfine coupling tensor between an NV center and a nearest neighbor ^13C nuclear spin, we show that the information of static vector magnetic field could be extracted by observing the pulsed continuous wave（CW） spectrum.展开更多
The application of the vector magnetometry based on nitrogen-vacancy(NV)ensembles has been widely investigatedin multiple areas.It has the superiority of high sensitivity and high stability in ambient conditions with ...The application of the vector magnetometry based on nitrogen-vacancy(NV)ensembles has been widely investigatedin multiple areas.It has the superiority of high sensitivity and high stability in ambient conditions with microscale spatialresolution.However,a bias magnetic field is necessary to fully separate the resonance lines of optically detected magneticresonance(ODMR)spectrum of NV ensembles.This brings disturbances in samples being detected and limits the rangeof application.Here,we demonstrate a method of vector magnetometry in zero bias magnetic field using NV ensembles.By utilizing the anisotropy property of fluorescence excited from NV centers,we analyzed the ODMR spectrum of NVensembles under various polarized angles of excitation laser in zero bias magnetic field with a quantitative numerical modeland reconstructed the magnetic field vector.The minimum magnetic field modulus that can be resolved accurately is downto~0.64 G theoretically depending on the ODMR spectral line width(1.8 MHz),and~2 G experimentally due to noisesin fluorescence signals and errors in calibration.By using 13C purified and low nitrogen concentration diamond combinedwith improving calibration of unknown parameters,the ODMR spectral line width can be further decreased below 0.5 MHz,corresponding to~0.18 G minimum resolvable magnetic field modulus.展开更多
文章设计一种应用于金刚石氮空位(nitrogen-vacancy,NV)系综量子实验的数字锁相放大器。为实现高速模拟与数字信号的采样、输出以及软硬件协同与同步处理能力,设计采用ZYNQ-7010芯片作为核心器件,基于现场可编程门阵列(field programmab...文章设计一种应用于金刚石氮空位(nitrogen-vacancy,NV)系综量子实验的数字锁相放大器。为实现高速模拟与数字信号的采样、输出以及软硬件协同与同步处理能力,设计采用ZYNQ-7010芯片作为核心器件,基于现场可编程门阵列(field programmable gate array,FPGA)与精简指令集计算机(reduced instruction set computer,RISC)微处理器(advanced RISC machines,ARM)内核的基本架构,同时搭载双路高采样率的模数转换器(analog to digital converter,ADC)和数模转换器(digital to analog converter,DAC)。整套系统可以同时进行多路锁相放大处理,输入模拟噪声低至1 nV/Hz 1/2,采样率高达125 MS/s,数据传输带宽可达800 Mib/s,具有集成化程度高、易操控、锁相准确性较高等特点。该设计成功应用在NV系综实验平台上,光探测磁共振(optically detected magnetic resonance,ODMR)实验及后续计算结果表明,使用文中锁相放大器的磁强计灵敏度可以达到1.23 nT/Hz 1/2。展开更多
We suggest an experimental scheme that a single nitrogen-vacancy（NV） center coupled to a nearest neighbor ^13C nucleus as a sensor in diamond can be used to detect a static vector magnetic field. By means of optical...We suggest an experimental scheme that a single nitrogen-vacancy（NV） center coupled to a nearest neighbor ^13C nucleus as a sensor in diamond can be used to detect a static vector magnetic field. By means of optical detection magnetic resonance（ODMR） technique, both the strength and the direction of the vector field could be determined by relevant resonance frequencies of continuous wave（CW） and Ramsey spectrums. In addition, we give a method that determines the unique one of eight possible hyperfine tensors for an（NV–^13C） system. Finally, we propose an unambiguous method to exclude the symmetrical solution from eight possible vector fields, which correspond to nearly identical resonance frequencies due to their mirror symmetry about ^14N–Vacancy–^13 C（^14N–V–^13C） plane.展开更多
微波毫米波芯片非破坏高分辨率近场分布成像对高频射频芯片的功能和失效分析至关重要.本实验基于金刚石NV(Nitrogen-Vacancy)色心这一独特的量子体系,选取直径约为14μm的金刚石样品,将其粘附于20μm直径的光纤锥形尖端,制备成高分辨、...微波毫米波芯片非破坏高分辨率近场分布成像对高频射频芯片的功能和失效分析至关重要.本实验基于金刚石NV(Nitrogen-Vacancy)色心这一独特的量子体系,选取直径约为14μm的金刚石样品,将其粘附于20μm直径的光纤锥形尖端,制备成高分辨、非破坏、微型化的探针,通过分析NV色心在微波场变化中的基态自旋演化规律,采用全光学的方法,一次性成像,获得芯片表面整体场分布.本文给出了氮化镓高电子迁移率晶体管的近场分布成像图,拟合出光学探测磁共振(Optically Detected Magnetic Resonance,ODMR)谱图以及Rabi谱图,并对成像结果进行了分析.这一系统具有高效、高分辨、高灵敏度、对近场干扰小等优势,有望为高集成度微波电路故障诊断、天线辐射剖面、微波集成电路电磁兼容测试等应用提供一种全新的方案.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11305074,11135002,11804112,and 11275083)the Key Program of the Education Department Outstanding Youth Foundation of Anhui Province,China(Grant No.gxyqZD2017080)+2 种基金the Natural Science Foundation of Anhui Province,China(Grant No.KJHS2015B09)the Open Fund of Anhui Ley Laboratory for Condensed Matter Physics under Extreme Conditions and CAS Key Laboratory of Microscale Magnetic Resonance(Grant No.KLMMR201804)the Fund of Scientific Research Platform of Huangshan University
文摘We carried out a proof-of-principle demonstration of the reconstruction of a static vector magnetic field involving adjacent three nitrogen-vacancy(NV) sensors with corresponding different NV symmetry axes in a bulk diamond. By means of optical detection of the magnetic resonance(ODMR) techniques, our experiment employs the continuous wave(CW) to monitor resonance frequencies and it extracts the information of the detected field strength and polar angles with respect to each NV frame of reference. Finally, the detected magnetic field relative to a fixed laboratory reference frame was reconstructed from the information acquired by the multi-NV sensor.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11305074,11135002,and 11275083)the Key Program of the Education Department Outstanding Youth Foundation of Anhui Province,China(Grant No.gxyq ZD2017080)the Education Department Natural Science Foundation of Anhui Province,China(Grant No.KJHS2015B09)
文摘We perform a proof-of-principle experiment that uses a single negatively charged nitrogen–vacancy（NV） color center with a nearest neighbor ^13C nuclear spin in diamond to detect the strength and direction（including both polar and azimuth angles） of a static vector magnetic field by optical detection magnetic resonance（ODMR） technique. With the known hyperfine coupling tensor between an NV center and a nearest neighbor ^13C nuclear spin, we show that the information of static vector magnetic field could be extracted by observing the pulsed continuous wave（CW） spectrum.
基金supported by the National Key R&D Program of China(Grant Nos.2021YFB3202800 and 2023YF0718400)Chinese Academy of Sciences(Grant No.ZDZBGCH2021002)+2 种基金Chinese Academy of Sciences(Grant No.GJJSTD20200001)Innovation Program for Quantum Science and Technology(Grant No.2021ZD0303204)Anhui Initiative in Quantum Information Technologies,USTC Tang Scholar,and the Fundamental Research Funds for the Central Universities.
文摘The application of the vector magnetometry based on nitrogen-vacancy(NV)ensembles has been widely investigatedin multiple areas.It has the superiority of high sensitivity and high stability in ambient conditions with microscale spatialresolution.However,a bias magnetic field is necessary to fully separate the resonance lines of optically detected magneticresonance(ODMR)spectrum of NV ensembles.This brings disturbances in samples being detected and limits the rangeof application.Here,we demonstrate a method of vector magnetometry in zero bias magnetic field using NV ensembles.By utilizing the anisotropy property of fluorescence excited from NV centers,we analyzed the ODMR spectrum of NVensembles under various polarized angles of excitation laser in zero bias magnetic field with a quantitative numerical modeland reconstructed the magnetic field vector.The minimum magnetic field modulus that can be resolved accurately is downto~0.64 G theoretically depending on the ODMR spectral line width(1.8 MHz),and~2 G experimentally due to noisesin fluorescence signals and errors in calibration.By using 13C purified and low nitrogen concentration diamond combinedwith improving calibration of unknown parameters,the ODMR spectral line width can be further decreased below 0.5 MHz,corresponding to~0.18 G minimum resolvable magnetic field modulus.
文摘文章设计一种应用于金刚石氮空位(nitrogen-vacancy,NV)系综量子实验的数字锁相放大器。为实现高速模拟与数字信号的采样、输出以及软硬件协同与同步处理能力,设计采用ZYNQ-7010芯片作为核心器件,基于现场可编程门阵列(field programmable gate array,FPGA)与精简指令集计算机(reduced instruction set computer,RISC)微处理器(advanced RISC machines,ARM)内核的基本架构,同时搭载双路高采样率的模数转换器(analog to digital converter,ADC)和数模转换器(digital to analog converter,DAC)。整套系统可以同时进行多路锁相放大处理,输入模拟噪声低至1 nV/Hz 1/2,采样率高达125 MS/s,数据传输带宽可达800 Mib/s,具有集成化程度高、易操控、锁相准确性较高等特点。该设计成功应用在NV系综实验平台上,光探测磁共振(optically detected magnetic resonance,ODMR)实验及后续计算结果表明,使用文中锁相放大器的磁强计灵敏度可以达到1.23 nT/Hz 1/2。
基金Protect supported by the National Natural Science Foundation of China(Grant Nos.11305074,11135002,and 11275083)the Key Program of the Education Department Outstanding Youth Foundation of Anhui Province,China(Grant No.gxyq ZD2017080)the Natural Science Foundation of Anhui Province,China(Grant No.KJHS2015B09)
文摘We suggest an experimental scheme that a single nitrogen-vacancy（NV） center coupled to a nearest neighbor ^13C nucleus as a sensor in diamond can be used to detect a static vector magnetic field. By means of optical detection magnetic resonance（ODMR） technique, both the strength and the direction of the vector field could be determined by relevant resonance frequencies of continuous wave（CW） and Ramsey spectrums. In addition, we give a method that determines the unique one of eight possible hyperfine tensors for an（NV–^13C） system. Finally, we propose an unambiguous method to exclude the symmetrical solution from eight possible vector fields, which correspond to nearly identical resonance frequencies due to their mirror symmetry about ^14N–Vacancy–^13 C（^14N–V–^13C） plane.
文摘微波毫米波芯片非破坏高分辨率近场分布成像对高频射频芯片的功能和失效分析至关重要.本实验基于金刚石NV(Nitrogen-Vacancy)色心这一独特的量子体系,选取直径约为14μm的金刚石样品,将其粘附于20μm直径的光纤锥形尖端,制备成高分辨、非破坏、微型化的探针,通过分析NV色心在微波场变化中的基态自旋演化规律,采用全光学的方法,一次性成像,获得芯片表面整体场分布.本文给出了氮化镓高电子迁移率晶体管的近场分布成像图,拟合出光学探测磁共振(Optically Detected Magnetic Resonance,ODMR)谱图以及Rabi谱图,并对成像结果进行了分析.这一系统具有高效、高分辨、高灵敏度、对近场干扰小等优势,有望为高集成度微波电路故障诊断、天线辐射剖面、微波集成电路电磁兼容测试等应用提供一种全新的方案.
