29.2 A Scalable Quantum Magnetometer in 65nm CMOS with Vector-Field Detection Capability
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2019-02-01 |
| Authors | Mohamed I. Ibrahim, Christopher Foy, Dirk Englund, Ruonan Han |
| Institutions | Massachusetts Institute of Technology |
| Citations | 8 |
Abstract
Section titled āAbstractāRoom-temperature control and detection of the nitrogen vacancy (NV) center in diamondās spin-state has enabled magnetic sensing with high sensitivity and spatial resolution [1], [2]. However, current NV sensing apparatuses use bulky off-the-shelf components, which greatly increase the systemās scale. In [3], a compact platform, which attaches nanodiamond particles to a CMOS sensor, shrinks this spin-based magnetometer to chip scale; however, the optically detected magnetic resonance (ODMR) curve it generates carries large fluctuation leading to inferior sensitivity. In this paper, we present a CMOS-NV quantum sensor with (i) a highly-scalable microwave-delivering structure and (ii) a Talbot-effect-based photonic filter with enhanced green-to-red suppression ratio. The former enables coherent driving of an increased number of NV centers, and the latter reduces the shot noise of the photo-detector caused by the input green laser. In addition, the usage of a bulk diamond also enables vector magnetometry, which allows for the tracking of magnetic objects and navigation. The prototype sensor provides a measured vector-field sensitivity of 245nT/Hz <sup xmlns:mml=āhttp://www.w3.org/1998/Math/MathMLā xmlns:xlink=āhttp://www.w3.org/1999/xlinkā>1/2</sup> .
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
Section titled āReferencesā- 2008 - Nanoscale imaging magnetometry with diamondspins under ambient conditions [Crossref]