ESR detection of optically-induced hyperpolarization of nitrogen vacancy centers in diamond

Min-Gi An; 심정현; 김기웅; Sangwon Oh; 정근홍

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자료유형: 학술저널

저자정보: Min-Gi An 심정현 김기웅 Sangwon Oh 정근홍

저널정보: 한국자기공명학회 Journal of the Korean Magnetic Resonance Society Journal of the Korean Magnetic Resonance Society 제24권 제1호

발행연도: 2020.1

수록면: 9 - 15 (7page)

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Nitrogen vacancy center (NV center) in diamond has recently been appeared as a promising candidate for hyperpolarization applications due to its optical pumping property by laser. Optically Detected Magnetic Resonance (ODMR) has been used as a conventional method to obtain the resonance spectrum of NV centers. ODMR, however, has a shortcoming of sensitivity and a limitation of subjects, such that the degree of hyperpolarization can hardly be estimated, and that the spins other than NV centers are invisible. In contrast, Electron Spin Resonance (ESR) spectroscopy is known to proportionally reflect the degree of spin polarization. In this work, we successfully observed the optically-induced hyperpolarization of NV spins in diamond through CW-ESR spectroscopy with an X-band system. All the NV peaks were identified by calculating the eigenvalues of NV spin Hamiltonian. The intensities of NV peaks were enhanced over 240 times after optical pumping. The enhanced peaks corresponding to the transition from |ms=0> to |ms=-1> revealed inverted phases, while other peaks remained in-phase. The optically-induced hyperpolarization on NV spins can be a useful polarization source, leading to 13C nuclear hyperpolarization in diamond.

참고문헌 (13)

참고문헌 신청

M. Pham / 2012 / Phys. Rev. B 86:121202

정근홍 / 2016 / Minireview on Nuclear Spin Polarization in Optically-Pumped Diamond Nitrogen Vacancy Centers / Journal of the Korean Magnetic Resonance Society 20(4):114~120

Sangwon Oh / 2019 / Mini-review on fabrication of nitrogen vacancy center in diamond and its application to NMR / Journal of the Korean Magnetic Resonance Society 23(3):73~80

이현준 / 2018 / Optically Detected Magnetic Resonance with Nitrogen-Vacancy Spin Ensemble in Diamond / Journal of the Korean Magnetic Resonance Society 22(2):40~45

R. Schirhagl / 2014 / Annu. Rev. Phys. Chem 65:83

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