High-field optically detected nuclear magnetic resonance in GaAs

Poggio, M.; Awschalom, D. D.
May 2005
Applied Physics Letters;5/2/2005, Vol. 86 Issue 18, p182103
Academic Journal
A method for high-field optically detected nuclear magnetic resonance (ODNMR) is developed sensitive to 108 nuclei. Nuclear spin transitions are induced using a radio frequency coil and detected through Faraday rotation spectroscopy. Unlike conventional ODNMR, which is limited to low fields and relies on the measurement of time-averaged luminescence polarization, this technique monitors nuclear polarization through time-resolved measurements of electron spin dynamics. Measurements in a (110) GaAs quantum well reveal 69Ga, 71Ga, and 75As resonances and their quadrupolar splittings while resolving changes in nuclear polarization of 0.02%.


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