Imaging of high-frequency electromagnetic field by multipulse sensing using nitrogen vacancy centers in diamond

TL;DR

This paper demonstrates high-frequency radio field imaging at 19.23 MHz using nitrogen vacancy centers in diamond, employing multipulse sensing and amplitude-shaped control pulses for high spatial and frequency resolution.

Contribution

It introduces a novel multipulse dynamic decoupling method with amplitude-shaped pulses for high-frequency RF imaging using NV centers in diamond.

Findings

Achieved detection of RF fields at 19.23 MHz.

Enabled high frequency resolution with amplitude-shaped pulses.

Demonstrated potential for μm spatial resolution RF imaging.

Abstract

Near-field enhancement of the microwave field is applied for imaging high frequency radio field using a diamond chip with an $n$-doped isotopically purified diamond layer grown by microwave plasma assisted chemical vapor deposition. A short $\pi$ pulse length enables us to utilize a multipulse dynamic decoupling method for detection of radio frequency field at 19.23 MHz. An extraordinary frequency resolution of the external magnetic field detection is achieved by using amplitude-shaped control pulses. Our method opens up the possibility for high-frequency-resolution RF imaging at $\mu$m spatial resolution using nitrogen vacancy centers in diamond.