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Broadband microwave antenna for uniform manipulation of millimeter-scale volumes of diamond quantum sensors.
- Source :
- Journal of Applied Physics; 12/14/2022, Vol. 132 Issue 22, p1-8, 8p
- Publication Year :
- 2022
-
Abstract
- Quantum sensors based on nitrogen-vacancy (NV) centers in diamond are expected to demonstrate a wide variety of applications. For high-sensitivity quantum sensors with NV center ensembles, uniform manipulation of the electron spins of the NV centers in large volumes is required. In addition, a broad microwave frequency bandwidth for manipulating the NV centers' electron spin is necessary for vector magnetometry and measurement under a finite static magnetic field. Here, we demonstrate a broadband microwave antenna for uniform manipulation of millimeter-scale volumes of diamond quantum sensors. The simulation shows that the current is distributed at both edges of the loop coil of a single copper plate due to the skin effect. The loop coil acts like a Helmholtz coil, which realizes uniformity in the z-direction of the microwave magnetic field (B<subscript>1</subscript>). The plate structure has a higher mechanical stability, durability, and a larger heat capacity than the Helmholtz coil, due to its large volume. The antenna achieves a higher performance than previously reported antennae, with a maximal B<subscript>1</subscript> of 4.5 G, a broad bandwidth of 287 ± 6 MHz, and a peak-to-peak variation of 9.2 % over a 3.1 mm<superscript>3</superscript> cylinder volume. These performances show that the presented antenna is suitable for manipulating solid-state spin ensembles for high-sensitivity quantum sensors. [ABSTRACT FROM AUTHOR]
- Subjects :
- MICROWAVE antennas
ELECTRON spin
DETECTORS
SKIN effect
ANTENNAS (Electronics)
Subjects
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 132
- Issue :
- 22
- Database :
- Complementary Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 160822712
- Full Text :
- https://doi.org/10.1063/5.0128406