Article
Optics
Muhib Omar, Andreas Conta, Andreas Westerhoff, Raphael Hasse, Georgios Chatzidrosos, Dmitry Budker, Arne Wickenbrock
Summary: We propose a design to enhance the collected fluorescence of nitrogen-vacancy color centers in diamond for quantum-sensing. Our experimental results demonstrate a 3.8-fold increase in collected fluorescence when comparing opposite emitting surfaces, which is consistent with ray-tracing simulation. This design improves the sensitivity in optical readout-based measurements of various physical quantities.
Article
Chemistry, Multidisciplinary
Umberto Celano, Hai Zhong, Florin Ciubotaru, Laurentiu Stoleriu, Alexander Stark, Peter Rickhaus, Felipe Favaro de Oliveira, Mathieu Munsch, Paola Favia, Maxim Korytov, Patricia Van Marcke, Patrick Maletinsky, Christoph Adelmann, Paul van der Heide
Summary: In this study, nonperturbative field distribution mapping in ultra-scaled magnetic nanowires with diameters down to 6 nm was achieved using scanning nitrogen-vacancy magnetometry, enabling localized, minimally invasive magnetic imaging with sensitivity down to 3 μT Hz(-1/2). The imaging revealed the presence of weak magnetic inhomogeneities inside in-plane magnetized nanowires, largely undetectable with standard metrology. The strong magnetic field confinement in the nanowires allowed for the study of the interaction between the stray magnetic field and the nitrogen-vacancy sensor, clarifying the formation mechanisms for technologically relevant magnetic nanostructures.
Article
Chemistry, Multidisciplinary
Disheng Chen, Johannes E. Froch, Shihao Ru, Hongbing Cai, Naizhou Wang, Giorgio Adamo, John Scott, Fuli Li, Nikolay Zheludev, Igor Aharonovich, Weibo Gao
Summary: This study successfully observed resonance fluorescence from GeV color centers in diamond by using cross-polarization to suppress laser scattering and achieved two-photon interference based on single GeV color center. The single-shot readout of spin states was also demonstrated, laying the foundation for building a quantum network with GeV color centers in diamond.
Article
Chemistry, Physical
Olivia Woodman, Abdolreza Pasharavesh, Christopher Wilson, Michal Bajcsy
Summary: We propose a scheme for detecting single microwave photons by utilizing dipole-induced transparency (DIT) in an optical cavity coupled to a spin-selective transition of a negatively charged nitrogen-vacancy (NV-) defect in diamond crystal lattices. The interaction between the optical cavity and the NV- center is controlled by the microwave photons through the spin state of the defect. The spin state is then measured with high fidelity by counting the number of reflected photons when the cavity is probed by resonant laser light. Numerical simulations show that detection efficiencies of nearly 90% and fidelities exceeding 90% are achievable with realistic cavity parameters.
Article
Engineering, Electrical & Electronic
Kaisarbek Omirzakhov, Mohamad Hossein Idjadi, Tzu-Yung Huang, S. Alex Breitweiser, David A. A. Hopper, Lee C. C. Bassett, Firooz Aflatouni
Summary: In this paper, an integrated reconfigurable quantum control system is reported, which is used to find electron-spin resonance (ESR) frequency and perform Rabi, Ramsey, and Hahn-echo measurements for a nitrogen-vacancy (NV) center spin qubit in diamond. The chip can be programmed to synthesize an RF signal tunable from 1.6 to 2.6 GHz, which is modulated with a sequence of up to 4098 reconfigurable pulses with a pulse width and pulse-to pulse delay adjustable from 10 ns to 42 ms and 18 ns to 42 ms, respectively, at a resolution of 2.5 ns. The 180-nm CMOS chip is fabricated within a footprint of 3.02 mm(2) and has a power consumption of 80 mW.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Physics, Applied
Kun Huang, Yunlong Nie, Baixi Du, Jinlong Jiang, Zichuan Zhang, Qi Wang, RanRan Xu
Summary: The Letter introduces an integrated two-dimensional magnetometer module based on nitrogen vacancy centers in diamond with high sensitivity. Through methods like anti-microwave shield nets and fixed-frequency optical detection of magnetic resonance, accurate measurement and analysis of magnetic fields are achieved.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Applied
King Cho Wong, San Lam Ng, Kin On Ho, Yang Shen, Jiahao Wu, Kwing To Lai, Man Yin Leung, Wai Kuen Leung, Durga Bhaktavatsala Rao Dasari, Andrej Denisenko, Joerg Wrachtrup, Sen Yang
Summary: Single color centers in solid have emerged as a promising physical platform for quantum information science. This work proposes and demonstrates a distinct high-temperature annealing (HTA) approach for creating high-quality nitrogen vacancy (N-V) centers in implantation-free diamonds. The created N-V centers possess stable and Fourier-transform-limited optical spectra, and HTA strongly reduces noise sources and improves decoherence time and sensitivity. The study also explores the vacancy activation and defect reformation in spin baths and color centers.
PHYSICAL REVIEW APPLIED
(2022)
Article
Optics
Zong-Da Zhang, Si-Yu Yin, Li-Cheng Wang, Ying-De Wang, Yun-Fei Li, Zhen-Nan Tian, Qi-Dai Chen
Summary: An array of single NV centers was prepared using the femtosecond laser direct writing method to address the accuracy and consistency issues in static magnetic field detection. The prepared NV centers have fewer defects and good stress uniformity, with an average spatial positioning error of only 0.2 μm. This array enables high accuracy measurement of magnetic field vector and gradient.
Article
Multidisciplinary Sciences
Sanyou Chen, Wanhe Li, Xiaohu Zheng, Pei Yu, Pengfei Wang, Ziting Sun, Yao Xu, Defeng Jiao, Xiangyu Ye, Mingcheng Cai, Mengze Shen, Mengqi Wang, Qi Zhang, Fei Kong, Ya Wang, Jie He, Haiming Wei, Fazhan Shi, Jiangfeng Du
Summary: We developed a micrometer-resolution immunomagnetic microscopy (IMM) using nitrogen-vacancy centers in diamond as quantum sensors for imaging human tumor tissues. By immunomagnetically labeling cancer biomarkers and reconstructing magnetic images with deep-learning algorithms, we achieved quantification of biomarker expression. In addition, multimodal imaging of tumor tissues was realized by combining IMM with other imaging methods.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Chemistry, Physical
Chengyuan Yang, Zhaohong Mi, Huining Jin, Thirumalai Venkatesan, Ratnakar Vispute, Andrew A. Bettiol
Summary: We report a method for large-scale fabrication of negatively charged Silicon-vacancy (SiV-) centers in diamond membranes using MeV Helium ion implantation. Despite the polycrystalline structure of the diamond membranes, the SiV- centers exhibit a fluorescence lifetime comparable to those fabricated in single crystal diamonds. Patterning of SiV- centers with varying densities is demonstrated using a focused ion beam.
Article
Engineering, Electrical & Electronic
Ding Wang, Huan Fei Wen, Xin Li, Yuchong Jin, Wenyuan Hao, Ziheng Gao, Yanjie Liu, Zhonghao Li, Hao Guo, Zongmin Ma, Jun Tang, Jun Liu
Summary: In this article, the high-resolution characterization of chip surface 3-D microwave field distribution was achieved using diamond nitrogen-vacancy (NV) centers, along with the development of a field-image separation technique to suppress stray light noise. The feasibility of the proposed method was verified through experimental tests, providing a new approach for antenna radiation detection and on-chip measurement based on quantum detection techniques.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Chemistry, Multidisciplinary
Alexander Wood, Artur Lozovoi, Zi-Huai Zhang, Sachin Sharma, Gabriel I. Lopez-Morales, Harishankar Jayakumar, Nathalie P. de Leon, Carlos A. Meriles
Summary: Using confocal fluorescence microscopy, we observe the charge interconversion process between all three charge states of the silicon vacancy (SiV) center in diamond at room temperature. We uncover the two-step capture process of diffusing, photogenerated holes that leads to the formation of SiV0, and demonstrate the reverse process induced by continuous red illumination. These findings provide insight into the charge dynamics of SiV and hold promise for nanoscale sensing and quantum information processing.
Article
Nanoscience & Nanotechnology
Peng Wang, Takashi Taniguchi, Yoshiyuki Miyamoto, Mutsuko Hatano, Takayuki Iwasaki
Summary: Optical observation of PbV centers in diamond revealed their D-3d symmetry and intense emission peaks at low temperatures. The observed large ground state splitting significantly suppresses phonon-mediated transition, suggesting a potential for long spin coherence time at around 9 K. The cubic trend of ZPL width with temperature variation was also noted.
Article
Chemistry, Physical
Mariusz Mrozek, Mateusz Schabikowski, Marzena Mitura-Nowak, Janusz Lekki, Marta Marszalek, Adam M. Wojciechowski, Wojciech Gawlik
Summary: The experimental study focused on the longitudinal and transverse relaxation of negatively charged nitrogen-vacancy centers in diamond monocrystals prepared by 1.8 MeV proton implantation. Results showed that proton implantation technique can be versatile in controlling the production of nitrogen-vacancy color centers in thin films.
Article
Multidisciplinary Sciences
Qi Zhang, Yuhang Guo, Wentao Ji, Mengqi Wang, Jun Yin, Fei Kong, Yiheng Lin, Chunming Yin, Fazhan Shi, Ya Wang, Jiangfeng Du
Summary: The nitrogen-vacancy (NV) center in diamond is crucial for achieving high-fidelity single-shot readout of qubits, with a new spin-to-charge conversion method introduced to suppress spin-flip errors. This technique shows potential for exceeding fault-tolerant thresholds and may have applications in integrated optoelectronic devices.
NATURE COMMUNICATIONS
(2021)
