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, 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
Chemistry, Multidisciplinary
Andris Berzins, Hugo Grube, Einars Sprugis, Guntars Vaivars, Ilja Fescenko
Summary: This study investigates the implantation of helium ions into diamonds to create NV layers. By measuring various parameters, it is found that increasing the implantation dose improves the magnetic sensitivity of the sensors. Additionally, subsequent annealing only has a slight impact on sensitivity.
Article
Physics, Applied
P. Raecke, L. Pietzonka, J. Meijer, D. Spemann, R. Wunderlich
Summary: NV centers in diamond were engineered by introducing vacancies locally through argon ion implantation in type Ib diamond with subsequent annealing. The number of NV centers created from vacancies of a single implanted argon ion ranges from 0.04 to 0.79 depending on the ion energy. The diffusion of vacancies during annealing plays a significant role in NV yield behavior.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Hossein T. Dinani, Enrique Munoz, Jeronimo R. Maze
Summary: This theoretical work proposes using the nitrogen-vacancy (NV) center in diamond as a nanosensor to detect electrochemical signals from an electrolyte solution, thus obtaining a concentration sensor. By measuring the inhomogeneous dephasing rate of the electron spin of the NV center, the concentration of ions can be estimated for a range of mean ionic concentrations in the solution.
Article
Instruments & Instrumentation
Pauli Kehayias, Jacob Henshaw, Maziar Saleh Ziabari, Michael Titze, Edward Bielejec, Michael P. Lilly, Andrew M. Mounce
Summary: This method uses numerical simulation and optimization algorithms to automatically generate ion implantation recipes to achieve the desired defect density profile in a solid. By fitting and interpolating, defect density profiles at arbitrary ion energies can be generated. Through calculations and comparisons, the optimal ion implantation recipes are determined.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2021)
Article
Chemistry, Multidisciplinary
Oliver Roman Opaluch, Nimba Oshnik, Richard Nelz, Elke Neu
Summary: The study introduces a planar, omega-shaped microwave antenna based on stripline for spin control of NV color centers in diamond. An optimal antenna design was found through finite integral simulations, and antennas were successfully fabricated on a glass substrate, creating highly uniform microwave fields.
Article
Nanoscience & Nanotechnology
Marie Krecmarova, Michal Gulka, Thijs Vandenryt, Jaroslav Hruby, Ladislav Fekete, Pavel Hubik, Andrew Taylor, Vincent Mortet, Ronald Thoelen, Emilie Bourgeois, Milos Nesladek
Summary: The label-free biosensor concept is based on manipulation of charge state of nitrogen-vacancy (NV) quantum color centers in diamond, combined with an electrochemical microfluidic flow cell sensor. The functionality of the device was demonstrated by optical detection of DNA molecules, using a strongly cationic charged polymer to shift the charge state of NV centers. The developed electrochemical device can also be applied to nuclear magnetic resonance spin sensing.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
S. Kollarics, F. Simon, A. Bojtor, K. Koltai, G. Klujber, M. Szieberth, B. G. Markus, D. Beke, K. Kamaras, A. Gali, D. Amirari, R. Berry, S. Boucher, D. Gavryushkin, G. Jeschke, J. P. Cleveland, S. Takahashi, P. Szirmai, L. Forro, E. Emmanouilidou, R. Singh, K. Holczer
Summary: High concentration of negatively charged nitrogen-vacancy (NV-) centers was successfully created in diamond single crystals containing approximately 100 ppm nitrogen using electron and neutron irradiation and subsequent thermal annealing. The formation process and properties of NV- centers were observed, with about 25% of vacancies forming NVs during the annealing process, and high precision measurement of hyperfine and quadrupole coupling constants was achieved using EPR techniques.
Article
Physics, Applied
Peng Qian, Xue Lin, Feifei Zhou, Runchuan Ye, Yunlan Ji, Bing Chen, Guangjun Xie, Nanyang Xu
Summary: Machine learning method can optimize the precision of light readout and extract information, providing the best data processing model by learning time-resolved fluorescence data, reducing readout errors and optimizing contrast.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Multidisciplinary
He Jian, Jia Yan-Wei, Tu Ju-Ping, Xia Tian, Zhu Xiao-Hua, Huang Ke, An Kang, Liu Jin-Long, Chen Liang-Xian, Wei Jun-Jun, Li Cheng-Ming
Summary: Shallow nitrogen-vacancy centers can be created in diamond through low energy carbon ion implantation and vacuum annealing. The mechanism of transformation of nitrogen-vacancy centers in diamond was studied using Raman spectroscopy, X-ray photoelectron spectroscopy, and positron annihilation analysis.
ACTA PHYSICA SINICA
(2022)
Article
Physics, Applied
Cem Gueney Torun, Philipp-Immanuel Schneider, Martin Hammerschmidt, Sven Burger, Joseph H. D. Munns, Tim Schroeder
Summary: The study focuses on the fiber coupling performance of inverted nanocones for enhancing the light outcoupling of color centers in diamond. Optimized designs show high fiber coupling efficiency at specific wavelengths and promising results for broadband performance at room temperature. The analysis indicates that these nanostructures are robust against imperfections in fabrication.
APPLIED PHYSICS LETTERS
(2021)
Article
Multidisciplinary Sciences
Alexander Savvin, Alexander Dormidonov, Evgeniya Smetanina, Vladimir Mitrokhin, Evgeniy Lipatov, Dmitriy Genin, Sergey Potanin, Alexander Yelisseyev, Viktor Vins
Summary: The authors successfully demonstrated lasing in (NV-) centers in diamond, achieving improved laser efficiency by fine-tuning the pump conditions to reduce photoionization. Investigation into lasing conditions and gain saturation was conducted under high-power laser pulse pumping of diamond crystal.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Applied
Johannes Engel, Kaushalya Jhuria, Debanjan Polley, Tobias Luehmann, Manuel Kuhrke, Wei Liu, Jeffrey Bokor, Thomas Schenkel, Ralf Wunderlich
Summary: A common technique for creating color centers in wideband gap semiconductors is ion implantation followed by thermal annealing. Typically, this annealing process takes place in a vacuum oven. In this study, we utilized annealing based on femtosecond laser pulses. By implanting fluorine ions at 54 keV and chlorine ions at 74 keV into diamond, and performing micrometer precise annealing using focused femtosecond laser pulses (800 nm +/- (30) nm) with varying pulse numbers and repetition rates, we successfully created shallow spots with color centers of different brightness.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Aedan Gardill, Ishita Kemeny, Matthew C. Cambria, Yanfei Li, Hossein T. Dinani, Ariel Norambuena, Jeronimo R. Maze, Vincenzo Lordi, Shimon Kolkowitz
Summary: The control over charge states of color centers in solids is crucial for quantum technologies, but the microscopic charge dynamics of deep defects remain complex and unknown. By utilizing single-shot charge-state readout of an individual nitrogen-vacancy (NV) center, researchers were able to probe the charge dynamics of surrounding defects in diamond and demonstrate the charge conversion ability of optical illumination in capturing holes. This study sheds light on the importance of charge carrier generation, transport, and capture in quantum device design with color centers, offering a novel approach to probe and control charge dynamics in diamond.
Article
Physics, Atomic, Molecular & Chemical
V. Vorobyov, J. Javadzade, M. Joliffe, F. Kaiser, J. Wrachtrup
Summary: This paper compares two methods for addressing weakly coupled nuclei: dynamical decoupling and correlation spectroscopy. The spectral resolution required for two single nuclear spins was achieved using these methods, and a new approach was presented to derive components of their hyperfine coupling tensor.
APPLIED MAGNETIC RESONANCE
(2022)
Article
Chemistry, Physical
Charles Babin, Rainer Stoehr, Naoya Morioka, Tobias Linkewitz, Timo Steidl, Raphael Woernle, Di Liu, Erik Hesselmeier, Vadim Vorobyov, Andrej Denisenko, Mario Hentschel, Christian Gobert, Patrick Berwian, Georgy Astakhov, Wolfgang Knolle, Sridhar Majety, Pranta Saha, Marina Radulaski, Nguyen Tien Son, Jawad Ul-Hassan, Florian Kaiser, Joerg Wrachtrup
Summary: Optically addressable spin defects in silicon carbide (SiC) are a promising platform for quantum information processing, enabling high-fidelity spin qubit operations. However, degradation of spin-optical coherence after integration in nanophotonic structures poses a challenge for scalability towards large-scale quantum networks.
Review
Chemistry, Multidisciplinary
Qing Hua Wang, Amilcar Bedoya-Pinto, Mark Blei, Avalon H. Dismukes, Assaf Hamo, Sarah Jenkins, Maciej Koperski, Yu Liu, Qi-Chao Sun, Evan J. Telford, Hyun Ho Kim, Mathias Augustin, Uri Vool, Jia-Xin Yin, Lu Hua Li, Alexey Falin, Cory R. Dean, Felix Casanova, Richard F. L. Evans, Mairbek Chshiev, Artem Mishchenko, Cedomir Petrovic, Rui He, Liuyan Zhao, Adam W. Tsen, Brian D. Gerardot, Mauro Brotons-Gisbert, Zurab Guguchia, Xavier Roy, Sefaattin Tongay, Ziwei Wang, M. Zahid Hasan, Joerg Wrachtrup, Amir Yacoby, Albert Fert, Stuart Parkin, Kostya S. Novoselov, Pengcheng Dai, Luis Balicas, Elton J. G. Santos
Summary: Research on magnetism in 2D van der Waals materials has shown exciting potential for future applications, although challenges remain. It provides important theoretical foundations and guidance for future applications.
Article
Nanoscience & Nanotechnology
Stefania Castelletto, Alberto Peruzzo, Cristian Bonato, Brett C. Johnson, Marina Radulaski, Haiyan Ou, Florian Kaiser, Joerg Wrachtrup
Summary: In the past two decades, there have been significant advancements in the growth of silicon carbide (SiC) for electronic devices, particularly in high-power and high-frequency applications. Recent research has also uncovered unique optical properties of SiC that can be used for novel photonic devices. The combination of excellent electronic, photonic, and spintronic properties in SiC has prompted research in the development of devices and sensors in the quantum technology domain.
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
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
Federico Chiossi, Eloise Lafitte-Houssat, Kangwei Xia, Fiammetta Sardi, Zhonghan Zhang, Sacha Welinski, Perrine Berger, Loic Morvan, Varvara Foteinou, Alban Ferrier, Diana Serrano, Roman Kolesov, Joerg Wrachtrup, Philippe Goldner
Summary: This study investigates the optical and spin properties of 171Yb3+ ions in lithium niobate materials, revealing narrow optical homogeneous linewidths and long spin relaxation times at low temperatures, which are suitable for various applications in quantum photonics.
Article
Physics, Multidisciplinary
Ning Wang, Chu-Feng Liu, Jing-Wei Fan, Xi Feng, Weng-Hang Leong, Amit Finkler, Andrej Denisenko, Joerg Wrachtrup, Quan Li, Ren-Bao Liu
Summary: The study demonstrates that the relatively strong hyperfine coupling from a first-shell C-13 nuclear spin provides an effective bias field to achieve zero-field magnetometry and suppress charge noises in shallow nitrogen-vacancy centers. The hyperfine bias greatly enhances magnetic sensitivity and allows simultaneous measurement of magnetic noises at two different frequencies, providing spectral information of high-frequency noises.
PHYSICAL REVIEW RESEARCH
(2022)