Yuji Hatano

Current comparator for both AC and DC ratio measurements with 10− 8-level type-a uncertainty

Hidekazu Muramatsu, Yuta Kainuma, Hiromitsu Kato, Norihiko Sakamoto et autres

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 typically rely on distinct technologies-electromagnetic induction for AC and superconducting quantum interference devices for DC. This technological …

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A highly sensitive diamond NV magnetometer using Ramsey interferometry with a short sensor-to-sample distance

Yuta Araki, T. Sekiguchi, Yuji Hatano, Naota Sekiguchi et autres

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 nitrogen-vacancy centers using continuous-wave optically detected magnetic resonance and Ramsey methods typically rely on watt-level lasers to achieve high …

jp (code pays fourni par la source)

A Highly Sensitive Diamond NV Magnetometer Using Ramsey Interferometry with a Short Sensor-to-Sample Distance

Yuta Araki, T. Sekiguchi, Yuji Hatano, Naota Sekiguchi et autres

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 nitrogen-vacancy centers using continuous-wave optically detected magnetic resonance and Ramsey methods typically rely on watt-level lasers to achieve high …

A Highly Sensitive Diamond NV Magnetometer Using Ramsey Interferometry with a Short Sensor-to-Sample Distance

Yuta Araki, T. Sekiguchi, Yuji Hatano, Naota Sekiguchi et autres

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 nitrogen-vacancy centers using continuous-wave optically detected magnetic resonance and Ramsey methods typically rely on watt-level lasers to achieve high …

jp (code pays fourni par la source)

Design Concept of NV-Center-Based Wideband Current Comparators

Yasutaka Amagai, Hidekazu Muramatsu, Yuta Kainuma, Hiromitsu Kato et autres

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Highly Sensitive Magnetometer with Continuous Excitation Ramsey Protocol by Utilizing Long Dephasing Time of Millimeter‐Scale Spin Ensembles in (111) Diamond

Ikuya Fujisaki, Zehan Li, Yuji Hatano, T. Sekiguchi et autres

Abstract We developed a highly sensitive magnetometer with continuous excitation (CE) Ramsey protocol for (111) diamonds. The distinctive feature of the magnetometer is the magnet array and antenna design to realize a uniform bias field and efficient application of quantum manipulation techniques …

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The Principle and Application of Diamond Quantum Sensor

Yuji Hatano, Akimichi Nakazono, Mutsuko Hatano

1．はじめに

Heteroepitaxial (111) Diamond Quantum Sensors with Preferentially Aligned Nitrogen‐Vacancy Centers for an Electric Vehicle Battery Monitor

梶山健一, Kenichi Kajiyama, 春山盛善, Moriyoshi Haruyama et autres

脳磁計測に向けたRamsey法に基づく高感度ダイヤモンド磁力計の開発

Yuta Araki, Yuji Hatano, 宮川 仁, Masashi Miyakawa et autres

Heteroepitaxial (111) Diamond Quantum Sensors with Preferentially Aligned Nitrogen‐Vacancy Centers for an Electric Vehicle Battery Monitor

Moriyoshi Haruyama, Yuji Hatano, Hiromitsu Kato, Masahiko Ogura et autres

Abstract A platform for heteroepitaxial (111) chemical vapor deposition (CVD) diamond quantum sensors with preferentially aligned nitrogen vacancy (NV) centers on a large substrate is developed, and its operation as an electric vehicle (EV) battery monitor is demonstrated. A self‐standing heteroepitaxial CVD …

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Transverse magnetic field effects on diamond quantum sensor for EV battery monitor

Yuji Hatano, Junya Tanigawa, Akimichi Nakazono, T. Sekiguchi et autres

Key implementation points for achieving full accuracy in simultaneous temperature and magnetic field measurement and linearity when applying diamond quantum sensors to electric vehicle (EV) battery monitors were investigated. Both the static and busbar current magnetic field are required to be aligned …

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Inside Front Cover: Compact and Stable Diamond Quantum Sensors for Wide Applications (Adv. Quantum Technol. 9/2024)

Yuta Kainuma, Yuji Hatano, Takayuki Shibata, Naota Sekiguchi et autres

A diamond quantum sensor, based on an ensemble of nitrogen-vacancy (NV) centers in diamond, is depicted being held by the author's hand. This sensor module is compact, highly magnetically sensitive, and stable. It was achieved by mounting a 12C-enriched chemical vapor deposition …