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NV Ensemble Diamond Device Technologies for Quantum Sensing Applications

睦子 波多野, Mutsuko Hatano

Published Apr 1, 2017• 0 citations
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The nitrogen-vacancy (NV) color center in diamond has emerged as a promising candidate for quantum sensing. In this study, we propose a diamond-embedded metal antenna for magnetic detection utilizing NV center ensembles. Our approach involved employing nanofabrication and microwave plasma chemical vapor deposition techniques to fabricate the metal antenna and diamond epilayer. By directly embedding the antenna into the diamond, we effectively minimize external environmental interference, leading to improved device stability and reusability. Moreover, this integration enhances the device's compactness, making it highly suitable for on-chip quantum sensing applications. The innovative antenna design holds great potential for the development of future integrated quantum sensing devices based on NV centers in diamond.
Ensembles of negatively-charged nitrogen-vacancy (NV-) centres in diamond constitute a promising platform for magnetometry and other sensing applications. However, the sensitivity of present NV-ensemble devices and the need for diamond material with reproducible properties have hindered progress toward many envisioned applications. The work presented here addresses these challenges by optimizing a chemical vapor deposition (CVD) growth process to produce material at scale with improved NV-ensemble properties for both bulk and widefield magnetic sensing modalities.