181 citations · 240 across the 19 of their papers we have counts for
24 papers
Robust Diamond Quantum Sensing in Double-Quantum 4-Ramsey Interferometry by Dual-Feedback Scheme
Yuta Araki, Takeharu Sekiguchi, Yuji Hatano +11
We developed a highly sensitive and long-term stable diamond quantum magnetometer by integrating a dual-feedback system that compensates for common- and differential-mode frequency…
Persistence and emergence of quantum defects through pressure-induced phase changes
Alexander J Healey, Alan Salek, Christopher T-K Lew +15
Extreme pressures can transform materials and their properties, but probing these in-situ is made challenging by the small sample volumes and access requirements demanded by diamon…
Vacancy-mediated nitrogen diffusion and aggregation via high-fluence electron beam irradiation in HPHT synthesized diamond crystal
Chikara Shinei, Yuta Masuyama, Jun Chen +5
The negatively charged nitrogen vacancy (NV-) center in diamond is a promising point defect for highly sensitive quantum sensing. The formation of high-density NV- centers is essen…
A robust laser cavity platform for NV-diamond singlet infrared absorption magnetometry
Shao Qi Lim, Alexander A. Wood, Brett C. Johnson +9
The negatively charged nitrogen-vacancy center (NV) in diamond is a versatile platform for quantum magnetometry under ambient conditions. Recently, laser threshold magnetometry…
Quantum electrometry in a silicon carbide power device
Yuichi Yamazaki, Akira Kiyoi, Naoyuki Kawabata +7
For high-bias operation devices such as silicon carbide (SiC) power devices, early detection of failure mechanisms is essential to ensure reliability. This requires a method to map…
A Highly Sensitive Diamond NV Magnetometer Using Ramsey Interferometry with a Short Sensor-to-Sample Distance
Yuta Araki, Takeharu Sekiguchi, Yuji Hatano +11
In this study, we developed a diamond quantum magnetometer based on Ramsey interferometry with a short sensor-to-sample distance. Conventional biomagnetic sensors with ensemble nit…
Ion Concentration and Voltage Imaging with Fluorescent Nanodiamonds
Patrick Voorhoeve, Hiroshi Abe, Takeshi Ohshima +5
The nitrogen-vacancy (NV) center in diamond exists in different charge states with distinct photoluminescence properties, which are sensitive to the nanoscale electrochemical envir…
Spectator-transition crosstalk in a spin-3/2 silicon-vacancy qudit in silicon carbide revealed by broadband Ramsey interferometry
Jun-Jae Choi, Seung-Jae Hwang, Seoyoung Paik +9
Color-center spins in 4H-SiC offer a rare combination of wafer-scale materials maturity with long spin coherence and chip-level photonics, making them promising building blocks for…
Photoelectrical detection and characterization of divacancy and PL5-PL7 spins in silicon carbide
Naoya Morioka, Tetsuri Nishikawa, Hiroshi Abe +2
Photoelectrical detection of magnetic resonance (PDMR) offers a scalable alternative to optical readout of spin defects in semiconductors and is particularly promising for near-inf…
Photoionization current spectroscopy of individual silicon vacancies in silicon carbide
Kazuki Okajima, Tetsuri Nishikawa, Hiroshi Abe +5
Defect charge-state dynamics are central to both spin-photon interfaces and photoelectrical spin readout. Despite the significance of silicon vacancies (V1/V2) in silicon carbide (…
Multichannel highly sensitive diamond quantum magnetometer
Atsumi Yoshimura, Ayumi Kanamoto, Naota Sekiguchi +9
We demonstrate a highly sensitive real-time magnetometry method at two measurement points. This magnetometry method is based on the frequency-division multiplexing of continuous-wa…
Coupling 4H-Silicon Carbide spins to a microwave resonator at milli-Kelvin temperature
Ali Fawaz, Jeremy Bourhill, Stefania Castelletto +6
Coupling microwave cavity modes with spin qubit transitions is crucial for enabling efficient qubit readout and control, long-distance qubit coupling, quantum memory implementation…
Self-assembled fluorescent nanodiamond layers for quantum imaging
Katherine Chea, Erin S. Grant, Kevin J. Rietwyk +6
The nitrogen-vacancy (NV) center in diamond is emerging as a powerful tool for imaging magnetic and electric signals at the microscale and below. However, most imaging demonstratio…
The properties of the nitrogen-vacancy center in milled chemical vapor deposition nanodiamonds
Alessandro Mameli, Giannis Thalassinos, Marco Capelli +14
Fluorescent nanodiamonds (FNDs) containing negatively charged nitrogen-vacancy (NV-) centers are vital for many emerging quantum sensing applications from magnetometry to intracell…
Current comparator for both AC and DC ratio measurements with 10-8-level accuracy
Hidekazu Muramatsu, Yuta Kainuma, Hiromitsu Kato +11
Accurate measurements of alternating current (AC) and direct current(DC) ratios are fundamental to electric power metrology. However, conventional current comparators for AC and DC…
Nitrogen-vacancy centre formation via local femto-second laser annealing of diamond
Davin Yue Ming Peng, Alexander J Healey, Rebecca Griffin +7
Emerging quantum technologies based on the nitrogen-vacancy (NV) centre in diamond require carefully engineered material with controlled defect density, optimised NV formation proc…
Mesoscopic cavity quantum electrodynamics with phase-disordered emitters in a Kerr nonlinear resonator
Daniil M. Lukin, Bennet Windt, Miguel Bello +13
The field of cavity quantum electrodynamics (QED) has seen a recent resurgence of interest in few- and many-body physics owing to the realization that the breaking of symmetries an…
Minute-long quantum coherence enabled by electrical depletion of magnetic noise
Cyrus Zeledon, Benjamin Pingault, Jonathan C. Marcks +13
Integrating solid-state spin defects into classical electronic devices can enable new opportunities for quantum information processing that benefit from existing semiconductor tech…
Performance Evaluation of a Diamond Quantum Magnetometer for Biomagnetic Sensing: A Phantom Study
Naota Sekiguchi, Yuta Kainuma, Motofumi Fushimi +10
We employ a dry-type phantom to evaluate the performance of a diamond quantum magnetometer with a high sensitivity of about from the viewpoint of practica…
Violet to near-infrared optical addressing of spin pairs in hexagonal boron nitride
Priya Singh, Islay O. Robertson, Sam C. Scholten +9
Optically addressable solid-state spins are an important platform for practical quantum technologies. Van der Waals material hexagonal boron nitride (hBN) is a promising host as it…
A Room-Temperature Solid-State Maser Amplifier
Tom Day, Maya Isarov, William J. Pappas +6
Masers once represented the state-of-the-art in low noise microwave amplification technology, but eventually became obsolete due to their need for cryogenic cooling. Masers based o…
Optimisation of electron irradiation for creating spin ensembles in hexagonal boron nitride
Alexander J Healey, Priya Singh, Islay O Robertson +9
Boron vacancy centre () ensembles in hexagonal boron nitride (hBN) have attracted recent interest for their potential as two-dimensional solid-state quantum sensors. I…
Isotopic identification of engineered nitrogen-vacancy spin qubits in ultrapure diamond
T. Yamamoto, S. Onoda, T. Ohshima +15
Nitrogen impurities help to stabilize the negatively-charged-state of NV in diamond, whereas magnetic fluctuations from nitrogen spins lead to decoherence of NV qubits. It…
Extending spin coherence times of diamond qubits by high temperature annealing
T. Yamamoto, T. Umeda, K. Watanabe +14
Spins of negatively charged nitrogen-vacancy (NV) defects in diamond are among the most promising candidates for solid-state qubits. The fabrication of quantum devices containi…