Broadband, large-area microwave antenna for optically detected magnetic resonance of nitrogen-vacancy centers in diamond

Sasaki, Kento; Monnai, Yasuaki; Saijo, Soya; Ryushiro, Fujita; Watanabe, Hideyuki; Ishi‐Hayase, Junko; Itoh, Kohei M.; Abe, Eiichi

doi:10.1063/1.4952418

Cited by 132 publications

(107 citation statements)

References 32 publications

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“…In Ref. 62, we made a qualitative argument to view the antenna as a series LC circuit, where the circuit inductance L is proportional to the hole radius r, and the capacitance C is inversely proportional to the gap g and proportional to the gap width R + s − r. Then, the circuit has f res that is proportional to (LC) −1/2 ∝ (g/r(R + s − r)) −1/2 . This suggests that a reasonable strategy to reduce f res is to increase R and s. We performed three-dimensional electromagnetic simulations using CST MICROWAVE STUDIO R software, and identified the values of R and s that provide a desirable f res (Antenna #2 of Table I).…”

Section: Microwave Antennamentioning

confidence: 99%

Construction and operation of a tabletop system for nanoscale magnetometry with single nitrogen-vacancy centers in diamond

et al. 2020

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A single nitrogen-vacancy (NV) center in diamond is a prime candidate for a solid-state quantum magnetometer capable of detecting single nuclear spins with prospective application to nuclear magnetic resonance (NMR) at the nanoscale. Nonetheless, an NV magnetometer is still less accessible to many chemists and biologists, as its experimental setup and operational principle are starkly different from those of conventional NMR. Here, we design, construct, and operate a compact tabletop-sized system for quantum sensing with a single NV center, built primarily from commercially available optical components and electronics. We show that our setup can implement state-of-the-art quantum sensing protocols that enable the detection of single 13 C nuclear spins in diamond and the characterization of their interaction parameters, as well as the detection of a small ensemble of proton nuclear spins on the diamond surface. This article providing extensive discussions on the details of the setup and the experimental procedures, our system will be reproducible by those who have not worked on the NV centers previously.

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Section: Microwave Antennamentioning

confidence: 99%

Construction and operation of a tabletop system for nanoscale magnetometry with single nitrogen-vacancy centers in diamond

et al. 2020

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“…The optical and magnetic properties of the negatively charged nitrogen-vacancy (NV) center in diamond have been extensively investigated because of its potential application to quantum sensing [1], such as magnetic and electric fields [2,3], local temperature in bio-systems [4], and to quantum information technologies [5]. In most cases, near-infrared luminescence upon the excitation by green laser can be controlled by the irradiation of microwave, which tunes the optical transition paths between the excited and ground states [6].…”

Section: Introductionmentioning

confidence: 99%

Giant nonlinear optical effects induced by nitrogen-vacancy centers in diamond crystals

et al. 2019

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We investigate the effect of nitrogen-vacancy (NV) centers in single crystal diamond on nonlinear optical effects using 40 fs femtosecond laser pulses. The near infrared femtosecond pulses allow us to study purely nonlinear optical effects, such as optical Kerr effect (OKE) and two-photon absorption (TPA), relating to unique optical transitions by electronic structures with NV centers. It is found that both the nonlinear optical effects are enhanced by the introduction of NV centers in the N + dose levels of 2.0×10 11 and 1.0×10 12 N + /cm 2 . In particular, our data demonstrate that the OKE signal is strongly enhanced for the heavily implanted type-IIa diamond. We suggest that the strong enhancement of the OKE is possibly originated from cascading OKE, where the high-density NV centers effectively break the inversion symmetry near the surface region of diamond.

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“…The NV centers can be embedded in nanocrystals, which allows the NV centers to interact with local magnetic fields [15]. These properties are prerequisite to realizing a high-performance sensor for magnetic fields.Recently, vector magnetic field sensing by NV centers has become an active area of interest [16][17][18][19][20][21]. The NV center is aligned along one of four different axes due to C 3ν symmetry.…”

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Vector-magnetic-field sensing via multifrequency control of nitrogen-vacancy centers in diamond

et al. 2017

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An ensemble of nitrogen-vacancy (NV) centers in diamond is an attractive device to detect small magnetic fields. In particular, by exploiting the fact that the NV center can be aligned along one of four different axes due to C3ν symmetry, it is possible to extract information concerning vector magnetic fields. However, in the conventional scheme, low readout contrasts of the NV centers significantly decrease the sensitivity of the vector magnetic field sensing. Here, we propose a way to improve the sensitivity of the vector magnetic field sensing of the NV centers using multi-frequency control. Since the Zeeman energy of the NV centers depends on the direction of the axis, we can independently control the four types of NV centers using microwave pulses with different frequencies. This allows us to use every NV center for the vector field detection in parallel, which effectively increases the readout contrast. Our results pave the way to realize a practical diamond-based vector field sensor.The detection of small magnetic fields is important in the field of metrology, because there are many potential applications in biology and medical science. The performance of a magnetic field sensor is characterized by its spatial resolution and sensitivity; therefore, a significant amount of effort has been devoted to creating a device that can measure small magnetic fields in a local region [1][2][3].Nitrogen vacancy (NV) centers in diamond are fascinating candidates with which to construct a magnetic field sensor [4][5][6][7]. The NV center is a spin 1 system, and the frequency of the | ± 1 states can be shifted by magnetic fields. We can use this system as an effective two-level system spanned by |0 and |1 with a frequency selectivity where | − 1 is significantly detuned. We can implement gate operations of the spins in NV centers using microwave pulses [8][9][10][11]. It is possible to detect DC (AC) magnetic fields by implementing a Ramsey interference (spin echo) measurement [4][5][6]. Moreover, NV centers have a long coherence time, e.g., a few milli-seconds at a room temperature and a second at low temperature [12][13][14]. In addition, because the NV centers can be strongly coupled with optical photons, we can read out the state of the NV centers via fluorescence from the optical transitions [9,10]. The NV centers can be embedded in nanocrystals, which allows the NV centers to interact with local magnetic fields [15]. These properties are prerequisite to realizing a high-performance sensor for magnetic fields.Recently, vector magnetic field sensing by NV centers has become an active area of interest [16][17][18][19][20][21]. The NV center is aligned along one of four different axes due to C 3ν symmetry. The Zeeman energies of the NV centers are determined by gµ b B · d j (j = 1, 2, 3, 4) where g denotes the g factor, µ b denotes a Bohr magneton, B denotes the magnetic fields, and d j denotes the direction of the j-th NV axis. By sequentially performing Ramsey interference or spin echo measurements on NV centers with...

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Broadband, large-area microwave antenna for optically detected magnetic resonance of nitrogen-vacancy centers in diamond

Cited by 132 publications

References 32 publications

Construction and operation of a tabletop system for nanoscale magnetometry with single nitrogen-vacancy centers in diamond

Construction and operation of a tabletop system for nanoscale magnetometry with single nitrogen-vacancy centers in diamond

Giant nonlinear optical effects induced by nitrogen-vacancy centers in diamond crystals

Vector-magnetic-field sensing via multifrequency control of nitrogen-vacancy centers in diamond

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