Lock-in Thermography Using Diamond Quantum Sensors

Precise measurement of temperature distribution and thermal behavior in microscopic regions is critical many research fields. We demonstrate lock-in thermography using nitrogen-vacancy centers diamond nanoparticles. successfully visualize diffusion glass coverslip Teflon with micrometer resolution deduce their diffusivity. By spreading nanoparticles over the sample surface, variation can be measured directly without any physical contact, such as lead wires, making it possible to micrometer-scale various materials.