Wide‐Field Optical Microscopy of Microwave Fields Using Nitrogen‐Vacancy Centers in Diamonds

Real-time wide-field optical microscopy and spectroscopy of microwave fields is demonstrated using nitrogen-vacancy (NV) centers in diamonds. By monitoring electron spin dependent fluorescence of NV centers under a continuous illumination, a microwave field is imaged with an amplitude sensitivity of ≈45 nT Hz−1/2 and a frequency sensitivity of 2.5 kHz Hz−1/2, across a 200 × 200 μm2 imaging area with submicrometer spatial resolution. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.