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Sensitivity and heat penalty in all-optical quantum thermometry with Germanium-vacancy color centers in diamond

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2024-08-26
JournalApplied Physics Letters
AuthorsAjithamithra Dharmasiri, C. Vincent, T. I. Rajib, M. S. Pochechuev, Xinghua Liu
InstitutionsTexas A&M University
Citations4

Abstract

Section titled ā€œAbstractā€

All-optical thermometry based on laser-driven photoluminescence (PL) of germanium-vacancy (GeVāˆ’) centers in diamond is quantified in terms of a trade-off between temperature sensitivity and laser-induced heating. We show that the noise-floor sensitivity Ī·T of the temperature readout from the GeVāˆ’ PL return scales as (pĪ”t)āˆ’1/2 with the laser power p and detection time Ī”t, allowing the temperature uncertainty to be reduced by increasing p and Ī”t. This noise-floor reduction is, however, never penalty-free. Specifically, higher laser powers translate into higher temperatures of the diamond crystal. We demonstrate that the noise-floor as low as Ī·T = 37.5 mK/Hz can be achieved with the laser power set at p = 6.30 mW. We also show that a further reduction of Ī·T is possible at higher p. The experimental setting implemented in this study helps keep the level of heat released in a diamond crystal well below the typical level of microwave-induced heating in nitrogen-vacancy center-based thermometry, thus offering an advantageous approach for diamond-based thermometry in biological systems.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
  1. 2020 - The challenge of intracellular temperature [Crossref]
  2. 2021 - Diamond quantum thermometry: From foundations to applications [Crossref]
  3. 2016 - Fiber-optic electron-spin-resonance thermometry of single laser-activated neurons [Crossref]
  4. 2017 - Thermogenetic neurostimulation with single-cell resolution [Crossref]
  5. 2020 - All-optical brain thermometry in freely moving animals [Crossref]
  6. 2021 - Opportunities for hybrid diamond nanosensors targeting photothermal applications in biological systems [Crossref]
  7. 2020 - Multisite cell-and neural-dynamics-resolving deep brain imaging in freely moving mice with implanted reconnectable fiber bundles [Crossref]
  8. 2015 - Microwave-induced thermogenetic activation of single cells [Crossref]
  9. 2018 - Magnetic criticality enhanced hybrid nanodiamond thermometer under ambient conditions [Crossref]
  10. 2021 - Ultra-sensitive hybrid diamond nanothermometer [Crossref]

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