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
Physics, Applied
T. Luo, L. Lindner, R. Blinder, M. Capelli, J. Langer, V. Cimalla, F. A. Hahl, X. Vidal, J. Jeske
Summary: Single substitutional nitrogen atoms N-s(0) are necessary to create nitrogen-vacancy (NV) centers in diamonds. A method based on absorption spectroscopy in the UV-Visible range is presented for the determination of N-s(0) concentration. The method allows for rapid and accurate determination of N-s(0) densities, even in samples with varying concentrations. It has been cross-checked with electron paramagnetic resonance and found to be reliable.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Gabriel J. Abrahams, Ethan Ellul, Islay O. Robertson, Asma Khalid, Andrew D. Greentree, Brant C. Gibson, Jean -Philippe Tetienne
Summary: Optically detected magnetic resonance (ODMR) spectroscopy is increasingly used in practical quantum sensing devices. This study presents an ODMR meter that allows contactless monitoring of ODMR in a target object, which can find immediate use in medical and industrial applications. The meter demonstrates accurate temperature monitoring using nitrogen-vacancy (N-V) defects and can be extended to magnetic field measurements.
PHYSICAL REVIEW APPLIED
(2023)
Article
Optics
A. K. Dmitriev, A. K. Vershovskii
Summary: This study investigates the response of the level anticrossing signal to a quasiresonant radio-frequency field in zero magnetic field at nitrogen-vacancy (NV) color centers in diamond. It is demonstrated that the complex structure of this response can be explained by the Autler-Townes splitting. The possibility of controlling the parameters of the level anticrossing signal is considered, and it is shown that the slope of the central resonance recorded in this structure can be 2.3 times higher than the slope of the resonance recorded in the absence of a radio-frequency field. Conclusions are drawn about the nature of the level anticrossing effect in NV color centers in diamond under zero magnetic field.
Article
Materials Science, Multidisciplinary
Sergei Masis, Sergey Hazanov, Nir Alfasi, Oleg Shtempluck, Eyal Buks
Summary: The study uses optical detection of magnetic resonance to investigate dipolar interaction in diamond between nitrogen-vacancy color centers of different crystallographic orientations and substitutional nitrogen defects. Optical measurements of resonant spin flip-flips and flip-flops between different spin ensembles in diamond are demonstrated. The findings could aid in optimizing cross-polarization protocols to enhance the sensitivity of diamond-based detectors.
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
Quantum Science & Technology
Mingcheng Cai, Zhongzhi Guo, Chunxing Li, Simin Li, Fazhan Shi, Mengqi Wang, Hui Li, Pengfei Wang, Jiangfeng Du
Summary: This work presents a parallel optically detected magnetic resonance (ODMR) platform for single NV centers. It enables the measurement of magnetic resonance spectrum, Rabi oscillation, and spin echo of each NV center spot in parallel. The preliminary speedup achieved is approximately 20-fold compared to confocal-based ODMR and has the potential to be further extended to thousands of folds with updated equipment.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Materials Science, Multidisciplinary
Lukas Razinkovas, Marek Maciaszek, Friedemann Reinhard, Marcus W. Doherty, Audrius Alkauskas
Summary: The study conducted ab initio calculations on the photoionization characteristics of the NV center in diamond, revealing the mechanism of spin polarization induced electron state transition. These findings are crucial for interpreting and designing experiments on photoionization of NV centers.
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
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
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
Chemistry, Multidisciplinary
Changhao Li, Rouhollah Soleyman, Mohammad Kohandel, Paola Cappellaro
Summary: A molecular transducer based on NV centers has been proposed to convert SARS-CoV-2 RNA into magnetic noise signal for optical readout. This sensor demonstrates high sensitivity, low false negative rate, and fast detection of the virus.
Article
Chemistry, Multidisciplinary
Nattakarn Suntornwipat, Saman Majdi, Markus Gabrysch, Kiran Kumar Kovi, Viktor Djurberg, Ian Friel, Daniel J. Twitchen, Jan Isberg
Summary: Researchers demonstrate electrostatic control of valley currents in ultrapure single-crystalline diamond, proposing a model to interpret experimental data and paving the way for the development of valleytronic devices.
Article
Nanoscience & Nanotechnology
S. Becker, T. Luehmann, J. Meijer, S. Pezzagna
Summary: The compatibility of photoelectrically detected magnetic resonance with sulfur doping-enhanced nitrogen vacancy (NV) yield has been demonstrated. Different density ensembles of NV centers were generated in undoped, medium doped, and heavily doped areas of a diamond sample. The depths of dopant and nitrogen atom implantation were matched in advance using Monte Carlo simulation. Comparison of pulsed photoelectrically detected magnetic resonance spectra of the NV ensembles also showed a moderate enhancement of signal-to-noise ratio in the doped areas, suggesting a link with the increase of NV- to NV0 ratio observed in optical measurements.
Article
Chemistry, Multidisciplinary
Jeannine Gruene, Vladimir Dyakonov, Andreas Sperlich
Summary: Triplet excited states in organic semiconductor materials and devices are challenging to study, but play crucial roles in OLEDs and OPV devices. The innovative spin-sensitive method of trODMR can distinguish different states and determine their time scales, revealing fundamental differences in electrically and optically induced triplet states.
MATERIALS HORIZONS
(2021)
Article
Multidisciplinary Sciences
P. Kehayias, A. Jarmola, N. Mosavian, I. Fescenko, F. M. Benito, A. Laraoui, J. Smits, L. Bougas, D. Budker, A. Neumann, S. R. J. Brueck, V. M. Acosta
NATURE COMMUNICATIONS
(2017)
Article
Chemistry, Multidisciplinary
Abdelghani Laraoui, Carlos A. Meriles
Article
Physics, Applied
Daniela Pagliero, Abdelghani Laraoui, Jacob D. Henshaw, Carlos A. Meriles
APPLIED PHYSICS LETTERS
(2014)
Article
Chemistry, Multidisciplinary
Matthew E. Trusheim, Luozhou Li, Abdelghani Laraoui, Edward H. Chen, Hassaram Bakhru, Tim Schroeder, Ophir Gaathon, Carlos A. Meriles, Dirk Englund
Article
Physics, Multidisciplinary
J. S. Hodges, L. Li, M. Lu, E. H. Chen, M. E. Trusheim, S. Allegri, X. Yao, O. Gaathon, H. Bakhru, D. Englund
NEW JOURNAL OF PHYSICS
(2012)
Article
Materials Science, Multidisciplinary
O. Gaathon, J. S. Hodges, E. H. Chen, L. Li, S. Bakhru, H. Bakhru, D. Englund, R. M. Osgood
Article
Multidisciplinary Sciences
Abdelghani Laraoui, Florian Dolde, Christian Burk, Friedemann Reinhard, Joerg Wrachtrup, Carlos A. Meriles
NATURE COMMUNICATIONS
(2013)
Article
Multidisciplinary Sciences
Janis Smits, Joshua T. Damron, Pauli Kehayias, Andrew F. McDowell, Nazanin Mosavian, Ilja Fescenko, Nathaniel Ristoff, Abdelghani Laraoui, Andrey Jarmola, Victor M. Acosta
Article
Physics, Applied
Abdelghani Laraoui, Kapildeb Ambal
Summary: This Perspective reviews the applications of nitrogen-vacancy center (NV) based magnetometry to study magnetism in 2D vdW magnets. The topics discussed include the basics, advantages, challenges, and the usage of NV magnetometry.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Adam Erickson, Syed Qamar Abbas Shah, Ather Mahmood, Ilja Fescenko, Rupak Timalsina, Christian Binek, Abdelghani Laraoui
Summary: We directly imaged the boundary magnetization associated with antiferromagnetic domains in magnetoelectric epitaxial Cr2O3 thin films using diamond nitrogen vacancy microscopy. We found a correlation between magnetic domain size and structural grain size, which is related to the domain formation process. Lifting the degeneracy of the two otherwise degenerate 180 degrees domains is achievable with a magnetic field alone.
Article
Chemistry, Multidisciplinary
Suvechhya Lamichhane, Kayleigh A. McElveen, Adam Erickson, Ilja Fescenko, Shuo Sun, Rupak Timalsina, Yinsheng Guo, Sy-Hwang Liou, Rebecca Y. Lai, Abdelghani Laraoui
Summary: [Fe(Htrz)2(trz)](BF4) (Fe-triazole) spin crossover molecules exhibit thermal, electrical, and optical switching between high spin (HS) and low spin (LS) states, making them promising for molecular spintronics. In this study, nitrogen vacancy (NV) based magnetometry is used to investigate the magnetic properties of the Fe-triazole LS state in nanoparticle clusters and individual nanorods. Scanning electron microscopy (SEM) and Raman spectroscopy are employed to determine the size of the nanoparticles/nanorods and confirm their spin states. The results demonstrate the potential of NV quantum sensors for studying the magnetic properties of spin crossover molecules and molecular magnets.
Article
Materials Science, Multidisciplinary
Mohammadjavad Dowran, Andrew Butler, Suvechhya Lamichhane, Adam Erickson, Ufuk Kilic, Sy-Hwang Liou, Christos Argyropoulos, Abdelghani Laraoui
Summary: Hexagonal boron nitride (hBN) is a promising ultrathin host for single photon emitters (SPEs) in integrated quantum photonic networks. However, the low quantum efficiency of these SPEs has been a challenge. This study demonstrates a 200% plasmonic enhancement of SPE properties in hybrid nanophotonic structures composed of ultrathin hBN flakes coupled with plasmonic silver nanocubes (SNCs), offering potential for quantum optical communications and computing.
ADVANCED OPTICAL MATERIALS
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Jean-Yves Bigot, Mircea Vomir, Marie Barthelemy, Michele Albrecht, Abdelghani Laraoui
QUANTUM SENSING AND NANOPHOTONIC DEVICES IX
(2012)