Note: High sensitivity pulsed electron spin resonance spectroscopy with induction detection

Ygal Twig, Ekaterina Dikarov, Wayne D. Hutchison, Aharon Blank
2011 Review of Scientific Instruments  
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more » ... As/InSb nanowire based field effect transistors Commercial electron spin resonance spectroscopy and imaging systems make use of the so-called "induction" or "Faraday" detection, which is based on a radio frequency coil or a microwave resonator. The sensitivity of induction detection does not exceed ∼3 × 10 8 spins/ √ Hz. Here we show that through the use of a new type of surface loop-gap microresonators (inner size of 20 μm), operating at cryogenic temperatures at a field of 0.5 T, one can improve upon this sensitivity barrier by more than 2 orders of magnitude and reach spin sensitivities of ∼1.5 × 10 6 spins/ √ Hz or ∼2.5 × 10 4 spins for 1 h.
doi:10.1063/1.3611003 pmid:21806239 fatcat:ycmxwpfuk5c4tobwwpies4lhye