Article
Chemistry, Physical
A. Watanabe, T. Nishikawa, H. Kato, M. Fujie, M. Fujiwara, T. Makino, S. Yamasaki, E. D. Herbschleb, N. Mizuochi
Summary: The study focuses on the spin and optical properties of NV centers in phosphorus-doped n-type diamond, demonstrating an extension of spin-coherence time, stabilization of charge state, and improvement of creation yield at a depth of approximately 15 nm. The longest T-2 of about 580 μs for shallow NV centers approaches the limit in bulk diamond, limited by the nuclear spins of natural abundant C-13.
Article
Nanoscience & Nanotechnology
Harini Hapuarachchi, Francesco Campaioli, Jared H. Cole
Summary: The nitrogen-vacancy (NV) center in diamond is highly sensitive to various factors and can be optically interrogated. By utilizing plasmonic resonances, the brightness and collection efficiency of NV centers can be enhanced, which is important for their application in sensing devices. However, the interaction between NV centers and plasmonic structures is not well-explored. This study presents a general theory of NV-plasmonic nanoparticle interactions and provides a quantitative explanation for existing experimental measurements.
Article
Engineering, Electrical & Electronic
Qimeng Wang, Doudou Zheng, Xinyu Liu, Junzhi Zhao, Yuanyuan Shen, Hao Guo, Zhonghao Li, Jun Tang, Zongmin Ma, Yanjun Li, Jun Liu
Summary: Diamond-based magnetometers using nitrogen-vacancy (NV) centers are promising solid-state sensors, but their spatial range hinders their applications. To address this, we proposed a hybrid magnetometer based on a diamond-based hetero-NV center, which can calculate the magnetic field vector. By inserting NV-doped diamond blocks between permalloy concentrators in a triangular structure, we solved the vector deficiency problem. Real-time variation acquisition of the magnetic field signal was achieved by applying an ac magnetic field and modulation-demodulation methods.
IEEE SENSORS JOURNAL
(2023)
Article
Optics
Ju Wang, Xuexin Guo, Jinlong Yu, Chuang Ma, Yang Yu, Hao Luo, Lingchao Liu
Summary: A high-precision micro-displacement measurement method based on alternately oscillating optoelectronic oscillators (OEOs) is proposed. The method utilizes a reference loop to compensate for the change in measuring loop length, except for the displacement to be measured. This allows for self-calibration without the need for a phase-locked loop, greatly simplifying the system. The method achieves a measurement range of 20 mm with a precision of less than 300 nm, limited by the incomplete consistency between the reference and measuring loops and environmental disturbances from the spatial optical path.
Article
Materials Science, Multidisciplinary
Kin On Ho, Man Yin Leung, Yiu Yung Pang, King Cho Wong, Ping Him Ng, Sen Yang
Summary: This study investigates the properties inside polymeric products using a distinctive protocol with the negatively charged nitrogen vacancy center in nanodiamond. By measuring the time dependence of local pressure and strain during the chemical processes, the researchers were able to probe the local shear stress inside the materials in situ. This methodology is applicable to any kind of transparent amorphous solids with stress in the order of MPa and could potentially be applied to nanoscale in situ property studies with better apparatus.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Chemistry, Physical
Marie Kempkes, Tobias Zier, Kilian Singer, Martin E. Garcia
Summary: NV color centers in diamond exhibit various interesting properties suitable for technological applications like quantum sensing, secure message encryption, and biological imaging, and can also act as qubits. Utilizing femtosecond-laser pulses to induce NV center formation in diamond can modify interatomic bonding properties and lead to the attraction and formation of NV centers between vacancy and nitrogen impurity.
Article
Physics, Applied
Yuta Kainuma, Kunitaka Hayashi, Chiyaka Tachioka, Mayumi Ito, Toshiharu Makino, Norikazu Mizuochi, Toshu An
Summary: The study introduces an alternative method for fabricating a scanning NV probe using laser cutting and focused ion beam (FIB) milling. By utilizing a home-built scanning NV magnetometer probe microscopy setup, the study successfully measured optically detected magnetic resonance to detect stray magnetic fields and demonstrated imaging of a magnetic structure with approximately 5-micrometer periodicity. The method offers a higher degree of probe-shape control for scanning NV probes, broadening its application capabilities.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Physics, Multidisciplinary
Tianyu Xie, Zhiyuan Zhao, Maosen Guo, Mengqi Wang, Fazhan Shi, Jiangfeng Du
Summary: Research shows that even under ambient conditions, negatively charged nitrogen-vacancy (NV-) centers in diamond exhibit identical properties at Hz-precision level, offering a method for precision measurements in solids and implying a potential application of an atomiclike clock based on ensemble NV centers.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Physical
Priyadharshini Balasubramanian, Christian Osterkamp, Ovidiu Brinza, Maxime Rollo, Isabelle Robert-Philip, Philippe Goldner, Vincent Jacques, Fedor Jelezko, Jocelyn Achard, Alexandre Tallaire
Summary: In this study, properties of negatively charged nitrogen-vacancy (NV-) centers created during single crystal diamond growth on [113]-oriented substrates with N2O as a dopant gas using chemical vapor deposition (CVD) were investigated. The results showed that at moderate growth temperatures, dense NV- ensembles with high NV-/ N0s ratios and high creation yield can be achieved. The material obtained here combines a high NV- density, long coherence times, and partial preferential orientation, making it a promising candidate for diamond-based quantum sensors.
Article
Physics, Applied
Hiroshige Deguchi, Tsukasa Hayashi, Hiroya Saito, Yoshiki Nishibayashi, Minori Teramoto, Masanori Fujiwara, Hiroki Morishita, Norikazu Mizuochi, Natsuo Tatsumi
Summary: We have developed a compact and portable measuring instrument using diamond NV centers, which can be powered by a laptop computer's USB 3.0. The portability is achieved by low power consumption of the optics, thanks to the diamond corner cube that enhances the current of the photodiode by 2.1 times compared to planar diamond, and the microwave source that reduced power consumption by 20 dB using a microwave resonator with a λ/4 open stub to magnetically drive the NV center. These results contribute to the social implementation of diamond sensors.
APPLIED PHYSICS EXPRESS
(2023)
Article
Engineering, Electrical & Electronic
Yang Gao, Yong Zeng, Mingming Cui, Yingying Qiao, Xun Yang, Chaonan Lin, Jiale Zhao, Lei Li, Yi Wang, Chongxin Shan
Summary: This article presents a diamond NV center-based magnetic field sensor with a VCO integrated filtering antenna, which achieves better performance and higher integration level compared to conventional schemes.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Multidisciplinary Sciences
Hang Liang, Man Jiao, Yue Huang, Pei Yu, Xiangyu Ye, Ya Wang, Yijin Xie, Yi-Fu Cai, Xing Rong, Jiangfeng Du
Summary: Laboratory search for exotic interactions is crucial for exploring physics beyond the standard model. We report new experimental constraints on two exotic spin-dependent interactions at the micrometer scale based on ensembles of nitrogen-vacancy (NV) centers in diamond. Our results establish new bounds for these exotic spin interactions at the micrometer scale.
NATIONAL SCIENCE REVIEW
(2023)
Article
Chemistry, Multidisciplinary
Kristina S. Liu, Xiaoxin Ma, Roberto Rizzato, Anna L. Semrau, Alex Henning, Ian D. Sharp, Roland A. Fischer, Dominik B. Bucher
Summary: Atomic-scale magnetic field sensors based on NV defects in diamonds provide an exciting platform for nanoscale NMR spectroscopy. This study demonstrates nanoscale NMR spectroscopy of liquid samples by trapping molecules near NV centers using MOF on a diamond chip.
Article
Engineering, Electrical & Electronic
Xuemin Wang, Doudou Zheng, Xiaocheng Wang, Xinyu Liu, Qimeng Wang, Junzhi Zhao, Hao Guo, Li Qin, Jun Tang, Zongmin Ma, Jun Liu
Summary: This study proposes a 520-nm laser diode integrated with a NV magnetometer, which solves the issue of large laser volume affecting the integration and performance of magnetometers.
IEEE SENSORS JOURNAL
(2022)
Article
Optics
Jiahong Zhang, Qian Chen
Summary: In this paper, a Ti: LN optical waveguide intensive electric field sensor without metal structure is designed and fabricated. The simulation results show that the designed sensor has a high half-wave electric field and maximum detectable electric field.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Physics, Applied
Naoya Morioka, Di Liu, Oney O. Soykal, Izel Gediz, Charles Babin, Rainer Stoehr, Takeshi Ohshima, Nguyen Tien Son, Jawad Ul-Hassan, Florian Kaiser, Joerg Wrachtrup
Summary: This study provides a thorough investigation of the spin-optical dynamics of silicon vacancy centers in silicon carbide, including excited-state lifetimes, intersystem-crossing rates, and photoemission dynamics. The results deepen our understanding of the system and guide the implementation of scalable quantum applications based on silicon vacancy centers in silicon carbide.
PHYSICAL REVIEW APPLIED
(2022)
Article
Optics
Kangwei Xia, Fiammetta Sardi, Colin Sauerzapf, Thomas Kornher, Hans-Werner Becker, Zsolt Kis, Laszlo Kovacs, Denis Dertli, Jonas Foglszinger, Roman Kolesov, Joerg Wrachtrup
Summary: Electro-optical control is an essential tool for efficient integrated photonics, and lithium niobate on insulator (LNOI) is an emerging platform for on-chip photonics. Researchers have successfully incorporated rare-earth ion quantum emitters into electro-optical tunable lithium niobate thin films and demonstrated dynamic control over the frequency and Purcell enhancement of the microcavities. Single ions have been detected in the experiments.
Article
Quantum Science & Technology
Jonas Foglszinger, Andrej Denisenko, Thomas Kornher, Matthias Schreck, Wolfgang Knolle, Boris Yavkin, Roman Kolesov, Joerg Wrachtrup
Summary: This study demonstrates that the TR12 radiative defect in diamond exhibits a strong optically detected magnetic resonance (ODMR) signal and has stable detection capability even for strong off-axis magnetic fields. This makes TR12 centers suitable for vector magnetometry at high magnetic fields.
NPJ QUANTUM INFORMATION
(2022)
Article
Physics, Multidisciplinary
Rodolfo R. Soldati, Durga B. R. Dasari, Jor Wrachtrup, Eric Lutz
Summary: The thermodynamic performance of a minimal three-qubit heat-bath algorithmic cooling refrigerator is investigated theoretically and experimentally. The coefficient of performance, cooling power, and polarization of the target qubit are analytically computed for an arbitrary number of cycles, considering realistic experimental imperfections. The fundamental upper bounds of these values are determined in the ideal reversible limit, and it is shown that these values can be approached experimentally using a system of three qubits in a nitrogen-vacancy center in diamond.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Chen Zhang, Durga Dasari, Matthias Widmann, Jonas Meinel, Vadim Vorobyov, Polina Kapitanova, Elizaveta Nenasheva, Kazuo Nakamura, Hitoshi Sumiya, Shinobu Onoda, Junichi Isoya, Joerg Wrachtrup
Summary: Quantum sensors are known for their high sensitivity, but this often comes at the expense of other parameters. This study proposes a distortion-free quantum sensing protocol that combines quantum phase-sensitive detection with heterodyne readout, and demonstrates its capabilities using NV centers for reconstructing audio frequency signals.
NATURE COMMUNICATIONS
(2022)
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
Physics, Multidisciplinary
Wentian Zheng, Ke Bian, Xiakun Chen, Yang Shen, Shichen Zhang, Rainer Stohr, Andrej Denisenko, Jorg Wrachtrup, Sen Yang, Ying Jiang
Summary: An efficient method was developed to engineer the electrostatic environment of near-surface nitrogen vacancy center qubits, increasing their coherence and sensitivity.
Article
Multidisciplinary Sciences
Jonas Meinel, Vadim Vorobyov, Ping Wang, Boris Yavkin, Mathias Pfender, Hitoshi Sumiya, Shinobu Onoda, Junichi Isoya, Ren-Bao Liu, J. Wrachtrup
Summary: Conventional nonlinear spectroscopy can only access a limited set of correlations in a quantum system, while quantum nonlinear spectroscopy can extract arbitrary types and orders of correlations. The authors used quantum nonlinear spectroscopy to measure fourth-order correlations and identified Gaussian noises, random-phased AC fields, and quantum spins.
NATURE COMMUNICATIONS
(2022)
Article
Neurosciences
Chen Zhang, Jixing Zhang, Matthias Widmann, Magnus Benke, Michael Kuebler, Durga Dasari, Thomas Klotz, Leonardo Gizzi, Oliver Roehrle, Philipp Brenner, Joerg Wrachtrup
Summary: Magnetometers based on color centers in diamond exhibit excellent performance in sensitivity, bandwidth, dynamic range, and spatial resolution, making them widely applicable in various fields from biology and chemistry to industry. This study discusses the potential benefits of using these magnetometers for Magnetomyography (MMG) and Magnetoneurography (MNG) applications by analyzing sensitivity, dynamic range, and bandwidth, and comparing them to state-of-the-art techniques.
FRONTIERS IN NEUROSCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Jeffrey Neethi Neethirajan, Toni Hache, Domenico Paone, Dinesh Pinto, Andrej Denisenko, Rainer Stoehr, Peter Udvarhelyi, Anton Pershin, Adam Gali, Joerg Wrachtrup, Klaus Kern, Aparajita Singha
Summary: Near-surface negatively charged nitrogen vacancy (NV) centers show promise for magnetic imaging and quantum sensing, but their charge-state instabilities decrease fluorescence and NV coherence time, negatively affecting imaging sensitivity. In this study, we demonstrate that in situ adsorption of H2O on the diamond surface can partially recover the performance of shallow NV sensors. Controlled surface treatments are essential for implementing NV-based quantum sensing protocols under cryogenic ultrahigh vacuum conditions, as supported by band-bending calculations.
Article
Physics, Multidisciplinary
Yang Shen, Ping Wang, Chun Tung Cheung, Joerg Wrachtrup, Ren-Bao Liu, Sen Yang
Summary: Extracting useful signals is crucial for both classical and quantum technologies. Conventional noise filtering methods, limited in their application scope, rely on different patterns of signal and noise in frequency or time domains, while our proposed signal-nature-based approach leverages the intrinsic quantum nature of the system to single out quantum signals. We demonstrate the extraction of quantum correlation signals and the ability to separate the signal of a remote nuclear spin from overwhelming classical noise backgrounds, which is not achievable by conventional filter methods. Our work highlights the importance of quantum or classical nature as a new degree of freedom in quantum sensing and opens up new directions for quantum research.
PHYSICAL REVIEW LETTERS
(2023)
Correction
Physics, Multidisciplinary
Thomas Wolf, Philipp Neumann, Kazuo Nakamura, Hitoshi Sumiya, Takeshi Ohshima, Junichi Isoya, Joerg Wrachtrup
Article
Physics, Applied
Kin On Ho, Man Yin Leung, Wenyan Wang, Jianyu Xie, King Yau Yip, Jiahao Wu, Swee K. Goh, Andrej Denisenko, Joerg Wrachtrup, Sen Yang
Summary: High-pressure experiments play a crucial role in interdisciplinary research fields, but local probing techniques are limited due to the confinement of pressure chamber. The negatively charged nitrogen-vacancy (N-V) center has emerged as a versatile quantum sensor in pressurized environments. In this work, we compare the stress environments and performance of implanted N-V centers (IN-Vs) and N-V-enriched nanodiamonds (NDs) in a diamond anvil cell (DAC), revealing significant differences in stress tensors. We also propose methods to extend the working pressure of quantum sensing and explore more applications of the N-V center under pressure.
PHYSICAL REVIEW APPLIED
(2023)
Article
Optics
Vadim V. Vorobyov, Jonas Meinel, Hitoshi Sumiya, Shinobu Onoda, Junichi Isoya, Oleg Gulinsky, Joerg Wrachtrup
Summary: The ability to track and control the dynamics of a quantum system is crucial for quantum technology, but reconstructing the dynamics of a single quantum system from macroscopic data remains a challenging problem. In this study, we use weak measurements with an electron spin as a meter to track a single nuclear carbon spin in a diamond at room temperature. Through theoretical analysis and experiments, we establish the relationship between the statistical properties of the macroscopic readout signal of the electron spin and the quantum dynamics of the nucleus, and successfully reconstruct the quantum correlation using a measurement parameter. We validate our approach using the Leggett-Garg test.
Article
Materials Science, Multidisciplinary
T. Umeda, K. Watanabe, H. Hara, H. Sumiya, S. Onoda, A. Uedono, I Chuprina, P. Siyushev, F. Jelezko, J. Wrachtrup, J. Isoya
Summary: In this study, the existence of the boron-vacancy complex BV- in diamond was experimentally confirmed and its characteristics, such as spin multiplicity and hyperfine interactions, were analyzed. While optically pumped spin polarization of BV- was observed, its photoluminescence and optically detected magnetic resonance have not been confirmed.
