In this talk, I will present some of our work on using high-resolution magnetic imaging to solve a wide range of technical problems at Sandia. After motivating the design considerations for making an effective magnetic microscope, I will describe how we use magnetically-sensitive nitrogen-vacancy (NV) color centers in diamond to satisfy our required magnetic imaging specifications. Finally, I will describe our ongoing results using NV magnetic microscopy: making magnetic fingerprints for counterfeit protection, imaging the magnetic fields from electric currents in integrated-circuit devices, and characterizing ion chip traps used for quantum computing.

Biography:

Dr. Pauli Kehayias works on magnetic sensing and imaging at Sandia National Labs, with a research focus at the intersection of AMO physics, condensed-matter physics, and engineering. He did his PhD work at UC Berkeley working on nitrogen-vacancy (NV) centers in diamond. After a postdoc appointment at Harvard, where he extended NV magnetic sensing and imaging to geomagnetism and biomagnetism and collaborated with Prof. Victor Acosta at UNM, he came to Sandia as a Truman Fellowship postdoc. He currently works on high-sensitivity magnetometry experiments to solve DOE-related technical problems at Sandia, applying NV magnetometry to new applications.