Microwave for Quantum Sensors
Tiny defects in a boron nitride crystal act as ultra-sensitive magnetic sensors. But their signal resembles a radio with a mistuned antenna: instead of a clear note, you get a broad, noisy range.
Microwaves in a Diamond Anvil
In a diamond anvil cell, pressure squeezes a material as if it were buried hundreds of kilometers deep inside the Earth. Inside this chamber, tiny diamond sensors, color centers, respond to microwaves and report on the magnetic fields and temperatures around them.