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Extending coherence time of macro-scale diamond magnetometer by dynamical decoupling with coplanar waveguide resonator

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2018-12-01
JournalReview of Scientific Instruments
AuthorsY. MASUYAMA, Kosuke Mizuno, Hayato Ozawa, Hitoshi Ishiwata, Yuji Hatano
InstitutionsTokyo Institute of Technology, The University of Osaka
Citations31

Abstract

Section titled ā€œAbstractā€

Ultimate sensitivity for quantum magnetometry using nitrogen-vacancy (NV) centers in a diamond is limited by a number of NV centers and coherence time. Microwave irradiation with a high and homogeneous power density for a large detection volume is necessary to achieve a highly sensitive magnetometer. Here, we demonstrate a microwave resonator to enhance the power density of the microwave field and an optical system with a detection volume of 1.4 Ɨ 10āˆ’3 mm3. The strong microwave field enables us to achieve 48 ns Rabi oscillation which is sufficiently faster than the phase relaxation time of NV centers. This system combined with a decoupling pulse sequence, XY16, extends the spin coherence time (T2) up to 27 times longer than that with a spin echo method. Consequently, we obtained an AC magnetic field sensitivity of 10.8 pt/Hz using the dynamical decoupling pulse sequence.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
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  2. 2016 - Optical magnetic detection of single-neuron action potentials using quantum defects in diamond [Crossref]
  3. 2011 - Single-spin magnetometry with multipulse sensing sequences [Crossref]
  4. 2010 - Universal dynamical decoupling of a single solid-state spin from a spin bath [Crossref]
  5. 2009 - Gigahertz dynamics of a strongly driven single quantum spin [Crossref]
  6. 1990 - New, compensated Carr-Purcell sequences [Crossref]
  7. 1993 - Magnetoencephalography-theory, instrumentation, and applications to noninvasive studies of the working human brain [Crossref]
  8. 2016 - Polarization-and frequency-tunable microwave circuit for selective excitation of nitrogen-vacancy spins in diamond [Crossref]
  9. 2017 - Perfectly aligned shallow ensemble nitrogen-vacancy centers in (111) diamond [Crossref]
  10. 2018 - Ultra-broadband coplanar waveguide for optically detected magnetic resonance of nitrogen-vacancy centers in diamond [Crossref]

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