Improving the NV generation efficiency by electron irradiation

Bowen Zhao; Yang Dong; Shaochun Zhang; Xiangdong Chen; Wei Zhu; Fangwen Sun

doi:10.3788/COL202018.080201

Journals >Chinese Optics Letters >Volume 18 >Issue 8 >Page 080201 > Article

Chinese Optics Letters
Vol. 18, Issue 8, 080201 (2020)

Improving the NV generation efficiency by electron irradiation

Bowen Zhao^1、2, Yang Dong^1、2、*, Shaochun Zhang^1、2, Xiangdong Chen^1、2, Wei Zhu³, and Fangwen Sun^1、2

Author Affiliations

¹CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China

²CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China

³Hefei National Laboratory for Physical Science at Microscale, Department of Physics, University of Science and Technology of China, Hefei 230026, China

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DOI: 10.3788/COL202018.080201 Cite this Article Set citation alerts

Bowen Zhao, Yang Dong, Shaochun Zhang, Xiangdong Chen, Wei Zhu, Fangwen Sun. Improving the NV generation efficiency by electron irradiation[J]. Chinese Optics Letters, 2020, 18(8): 080201 Copy Citation Text

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Fig. 1. Magnetic sensing system.

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Fig. 2. PL saturation curves under different electron beam irradiation doses.

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Fig. 3. PL counts with different electron beam irradiation doses and excitation intensities.

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Fig. 4. Spectra of NV color centers with different electron beam irradiation doses.

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Fig. 5. ODMR contrast of the samples with different electron beam irradiation doses.

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Fig. 6. (a) XRD intensity of front side and (b) XRD rocking curves on both sides.

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Electron Dose ( $\times 10^{16} {cm}^{- 2})$	$I_{sat}$ ( $\times 10^{8} s^{- 1})$	$α$	Enhancement
0	2.07(0.07)	0.03(1)	1.00
1	2.94(0.15)	0.11(1)	1.42
2	8.44(0.51)	0.21(1)	4.01
4	18.30(1.43)	0.46(2)	8.84
8	38.06(2.18)	0.80(4)	18.39
16	44.49(3.77)	0.99(6)	21.49

Table 1. PL Saturations of Different Samples

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Electron Dose ( $\times 10^{16} {cm}^{- 2})$	$T_{2}^{*}$ (ns)	$T_{2}$ ( $μ s$ )	$T_{1}$ (ms)
0	—	80(4)	—
1	310(20)	75(2)	2.6(2)
2	458(21)	73(2)	2.5(2)
4	313(53)	125(5)	3.7(4)
8	447(23)	79(3)	3.5(3)
16	377(60)	77(4)	2.3(4)

Table 2. Decoherence Times for Different Samples

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Electron Dose ( $\times 10^{16} {cm}^{- 2}$ )	C(%)	$n$	$η_{dc}$ ( $nT / {Hz}^{1 / 2}$ )	$η_{ac}$ ( $nT / {Hz}^{1 / 2}$ )
0	4.7(1)	49.7(2.5)	—	7.59(36)
1	5.5(1)	94.8(4.7)	38.12(1.91)	3.85(16)
2	4.5(1)	229.8(11.5)	24.61(1.13)	3.06(12)
4	3.3(2)	402.9(20.1)	30.67(2.85)	2.41(14)
8	2.8(1)	822.2(41.1)	21.18(1.02)	2.50(14)
16	1.6(1)	929.9(46.5)	38.67(3.09)	4.25(27)

Table 3. Magnetic Field Measurement Sensitivity for DC and AC Magnetic Fields

Bowen Zhao, Yang Dong, Shaochun Zhang, Xiangdong Chen, Wei Zhu, Fangwen Sun. Improving the NV generation efficiency by electron irradiation[J]. Chinese Optics Letters, 2020, 18(8): 080201

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