January 26
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11:00 AM
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12:00 PM
Laser-enhanced magnetometry (and other quantum sensing) with nitrogen-vacancy (NV) centres in diamond
Abstract:
By integrating NV centres into a laser cavity and combining it with a second gain medium, we have achieved 100% contrast and 16mW of signal power in optically detected magnetic resonance (ODMR) read out via a laser signal instead of fluorescence. This leads to an advantage in shot-noise-limited sensitivity and/or dynamic range (set by the ODMR linewidth) of a factor of 780 compared to the average of existing NV and vapour-cell sensors.
Dr. Jan Jeske
At Fraunhofer IAF in Germany we furthermore perform imaging magnetometry with a NV widefield magnetometry setup (microscale) and a single NV in the tip of an AFM (nanoscale) and apply this to materials research and fatigue, electronics and biosamples.
Bio:
Dr. Jan Jeske has led the Quantum Sensing Group at Fraunhofer IAF in Freiburg Germany since 2018. Previously, he spent 4 years of postdoc in the group of Prof Andrew Greentree, where the idea of laser threshold magnetometry was developed theoretically. Jeske obtained his PhD at the RMIT University in Melbourne, Australia in the group of Prof. Jared Cole. He obtained a master’s in physics from the Karlsruhe Institute of Technology in Germany.
Dr. Jeske’s seminar is hosted by ECE Associate Professor Jennifer Choy.