Widefield Microwave Imaging in Alkali Vapor Cells With Sub-100 μm Resolution


We record images of microwave fields with sub-100 μm resolution using a microfabricated alkali vapor cell. The setup can additionally image dc magnetic fields, and can be configured to image microwave electric fields. Our technique could prove transformative in the design, characterisation, and debugging of microwave devices and find applications in medical imaging. These results were published in New Journal of Physics 17, 112002 (2015) as a fast track communication.