Avoiding power broadening in optically detected magnetic resonance of single NV defects for enhanced dc magnetic field sensitivity

By A. Dr'eau, M. Lesik, L. Rondin, P. Spinicelli, O. Arcizet, J. Roch, V. Jacques. 2011

422 citations recorded by the source corpus.

We report a systematic study of the magnetic field sensitivity of a magnetic sensor consisting of a single nitrogen-vacancy (NV) defect in diamond, by using continuous optically detected electron spin resonance (ESR) spectroscopy. We first investigate the behavior of the ESR contrast and linewidth as a function of the microwave and optical pumping power. The experimental results are in good agreement with a simplified model of the NV defect spin dynamics, leading to an optimized sensitivity around $2\phantom{\rule{4pt}{0ex}}\ensuremath{\mu}$T$/\sqrt{\mathrm{Hz}}$ for a single NV defect in a high-purity diamond crystal grown by chemical vapor deposition. We then demonstrate an enhancement of the magnetic sensitivity by one order of magnitude by using a simple pulsed-ESR scheme. This technique is based on repetitive excitation of the NV defect with a resonant microwave $\ensuremath{\pi}$ pulse followed by an optimized readout laser pulse, allowing to fully eliminate power broadening of the ESR linewidth. The achieved sensitivity is similar to that obtained by using Ramsey-type sequences, which is the optimal magnetic field sensitivity for the detection of a dc magnetic field.

Subfields: Atomic and Molecular Physics, and Optics, Geophysics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/a9d08062fe06a3f292d84d82586d09e60eb7511e

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Atomic and Molecular Physics, and Optics

1. M. Turner
2. J. Barry
3. J. Schloss
4. C. Hart
5. L. Pham
6. E. Bauch
7. R. Walsworth
8. Jean‐Philippe Tetienne

In Geophysics

1. M. Turner
2. R. Walsworth
3. J. Schloss
4. J. Barry
5. C. Hart
6. L. Pham
7. E. Bauch

In Materials Chemistry

1. M. Turner
2. R. Walsworth
3. J. Schloss
4. J. Barry
5. C. Hart
6. L. Pham
7. E. Bauch
8. Jean‐Philippe Tetienne

Citations in the corpus

• Sensitivity optimization for NV-diamond magnetometry (2019, methodology): “When the sensing time τπ is set to ≈ T ∗2 , these two broadening mechanisms contribute approximately equally to the resonance linewidth (Dréau et al., 2011).”
• Simultaneous Broadband Vector Magnetometry Using Solid-State Spins (2018, methodology): “The two main contributors to the expected sensitivity enhancement are (i) more effective noise rejection due to modulated pulsed-type protocols encoding magnetic information at higher frequencies than CW-ODMR, and (ii) the combination of enhanced PL contrast and reduced resonance linewidth from avoi”
• Magnetometry with nitrogen-vacancy defects in diamond (2013, background): “(b) Reprinted figure with permission from [52].”