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Nanoscale quantum optics and spectroscopy

Mario Agio

Published Jan 1, 2012• 0 citations
OpenAlex

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Nitrogen vacancy (NV) color centers in diamond are a leading modality for both superresolution optical imaging and nanoscale magnetic field sensing. In this work, we address the key challenge of performing optical magnetic imaging and spectroscopy selectively on multiple NV centers that are located within a diffraction-limited field-of-view. We use spin-RESOLFT microscopy to enable precision nanoscale mapping of magnetic field patterns with resolution down to ~20 nm, while employing a low power optical depletion beam. Moreover, we use a shallow NV to demonstrate the detection of proton nuclear magnetic resonance (NMR) signals exterior to the diamond, with 50 nm lateral imaging resolution and without degrading the proton NMR linewidth.
The confinement of atoms at the nanoscale is of interest for a diverse range of applications, from spatially selective sensing on the submicrometer scale to emerging quantum technologies. This study describes a bespoke method for manufacturing robust vapor cells with arbitrary nanoscale-confinement geometries. The device is designed with versatile, high-NA optical access. Spectroscopy of Rb atoms in purpose-built cells yields important insight into the diffusion and spatial distribution of a thermal vapor confined to a nanochannel. This work offers routes toward engineering solutions for localized control of atom numbers for scalable quantum optical experiments.