Dynamical decoupling methods in nanoscale NMR

¹ Department of Physical Chemistry, University of the Basque Country UPV/EHU - Apartado 644, 48080 Bilbao, Spain
² Instituto de Física Fundamental, IFF- CSIC - Calle Serrano 113b, 28006 Madrid, Spain
³ Centre for Theoretical Atomic, Molecular, and Optical Physics, School of Mathematics and Physics, Queen's University - Belfast BT7 1NN, UK
⁴ IKERBASQUE, Basque Foundation for Science - Plaza Euskadi 5, 48009 Bilbao, Spain

^(a) jcasanovamar@gmail.com (corresponding author)

Received: 23 April 2021
Accepted: 25 June 2021

Abstract

Nuclear magnetic resonance (NMR) schemes can be applied to micron-, and nanometer-sized samples by the aid of quantum sensors such as nitrogen vacancy (NV) color centers in diamond. These minute devices allow for magnetometry of nuclear spin ensembles with high spatial and frequency resolution at ambient conditions, thus having a clear impact in different areas such as chemistry, biology, medicine, and material sciences. In practice, NV quantum sensors are driven by microwave (MW) control fields with a twofold objective: On the one hand, MW fields bridge the energy gap between NV and nearby nuclei which enables a coherent and selective coupling among them while, on the other hand, MW fields remove environmental noise on the NV leading to enhanced interrogation time. In this work we review distinct MW radiation patterns, or dynamical decoupling techniques, for nanoscale NMR applications.