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Resonant two-photon absorption in an ONF vapor system for Rb. The percent transmission of the 776 nm signal through the nanofiber is plotted as a function of its detuning from the upper atomic state. (a) 780 nm power level of 146 nW. (b) 780 nm power level of 726 nW. Reprinted with permission from [79]. Copyright 2010 American Physical Society.
