상세정보
학술지
Optical Dynamic Nuclear Polarization of 13C Spins in Diamond at a Low Field with Multi-Tone Microwave Irradiation
- 저자
- Vladimir V. Kavtanyuk, 이현준, 오상원, 정근홍, 심정현
- 발행일
- 202203
- 출처
- Molecules, v.27 no.5, pp.1-11
- ISSN
- 1420-3049
- 출판사
- MDPI
- 협약과제
- 22HH3500, [전문연구실] 10pT급 미소자계 기반 중장거리 자기장 통신기술, 조인귀
- 초록
- Majority of dynamic nuclear polarization (DNP) experiments have been requiring helium cryogenics and strong magnetic fields for a high degree of nuclear polarization. In this work, we instead demonstrate an optical hyperpolarization of naturally abundant13C nuclei in a diamond crystal at a low magnetic field and the room temperature. It exploits continuous laser irradiation for polarizing electronic spins of nitrogen vacancy centers and microwave irradiation for transferring the electronic polarization to13C nuclear spins. We have studied the dependence of13C polarization on laser and microwave powers. For the first time, a triplet structure corresponding to the14N hyperfine splitting has been observed in the13C polarization spectrum. By simultaneously exciting three microwave frequencies at the peaks of the triplet, we have achieved13C bulk polarization of 0.113 %, leading to an enhancement of 90,000 over the thermal polarization at 17.6 mT. We believe that the multi-tone irradiation can be extended to further enhance the13C polarization at a low magnetic field.
- KSP 제안 키워드
- Diamond crystal, Dynamic Nuclear Polarization, High degree, Hyperfine splitting, Low magnetic field, Low-field, Magnetic field(MF), Microwave frequencies, Microwave irradiation(MWI), Nuclear spins, Polarization spectrum
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